Results for "Sounak Sadhukhan"

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A Solution of Degree Constrained Spanning Tree Using Hybrid GAJan 08 2014Jan 13 2014In real life, it is always an urge to reach our goal in minimum effort i.e., it should have a minimum constrained path. The path may be shortest route in practical life, either physical or electronic medium. The scenario is to represents the ambiance ... More
Anomalous Advection-Diffusion Models for Avascular Tumour GrowthMay 14 2019In this study, we model avascular tumour growth in epithelial tissue. This can help us to get a macroscopic view of the interaction between the tumour with its surrounding microenvironment and the physical changes within the tumour spheroid. This understanding ... More
Semiclassical theory for liquid-like behaviour of the frustrated magnet $\mathrm{Ca}_{10}\mathrm{Cr}_{7}\mathrm{O}_{28}$Jul 16 2017Nov 27 2017We identify the low energy effective Hamiltonian that is expected to describe the low temperature properties of the frustrated magnet $\mathrm{Ca}_{10}\mathrm{Cr}_{7}\mathrm{O}_{28}$. Motivated by the fact that this effective Hamiltonian has $S=3/2$ effective ... More
An Alternative Proof of Steinhaus TheoremMar 17 2019Mar 20 2019In measure theory, Steinhaus theorem is a result that deals with a property of the difference between two sets of positive measure. We give a simple elementary proof of the result.
Efficient quantum cluster algorithms for frustrated transverse field Ising antiferromagnets and Ising gauge theoriesDec 13 2018Working within the Stochastic Series Expansion (SSE) framework, we construct efficient quantum cluster algorithms for transverse field Ising antiferromagnets on the pyrochlore lattice and the planar pyrochlore lattice, for the fully frustrated square ... More
An Alternative Proof of Steinhaus TheoremMar 17 2019In measure theory, Steinhaus theorem is a result that deals with a property of the difference between two sets of positive measure. We give a simple elementary proof of the result.
Revisiting Fermat's Factorization for the RSA ModulusOct 21 2009We revisit Fermat's factorization method for a positive integer $n$ that is a product of two primes $p$ and $q$. Such an integer is used as the modulus for both encryption and decryption operations of an RSA cryptosystem. The security of RSA relies on ... More
Singular ferromagnetic susceptibility of the transverse-field Ising antiferromagnet on the triangular latticeMar 21 2016A transverse magnetic field $\Gamma$ is known to induce antiferromagnetic three-sublattice order of the Ising spins $\sigma^z$ in the triangular lattice Ising antiferromagnet at low enough temperature. This low-temperature order is known to melt on heating ... More
Long-Range Repulsion Between Spatially Confined van der Waals DimersOct 28 2016Nov 08 2016It is an undisputed textbook fact that non-retarded van der Waals (vdW) interactions between isotropic dimers are attractive, regardless of the polarizability of the interacting systems or spatial dimensionality. The universality of vdW attraction is ... More
Long-Range Repulsion Between Spatially Confined van der Waals DimersOct 28 2016It is an undisputed textbook fact that non-retarded van der Waals (vdW) interactions between isotropic dimers are attractive, regardless of the polarizability of the interacting systems or spatial dimensionality. The universality of vdW attraction is ... More
Multi-spike strings in $AdS_3$ with mixed three-form fluxesDec 06 2015May 11 2016The string sigma model in $AdS_3\times S^3$ supported by mixed three-form fluxes has recently been proved to be integrable which led to a plethora of work in this background including proposals for S matrix and study of semiclassical string profiles. ... More
Explanation of IceCube spectrum with $ν\rightarrow 3 ν$ neutrino splitting in a $ν$2HDM modelFeb 26 2018Oct 07 2018A single power law flux spectrum of high energy neutrinos does not adequately explain the entire 60 TeV to 10 PeV event spectrum observed at IceCube, specially the excess of PeV events and the lack of Glashow resonance events expected at 6.3 PeV cannot ... More
Configuration averaged spin correlation functions using the generalized recursion in augmented space : application to FeCr, FeMn and FeCo alloysOct 18 2015The focus of this communication is twofold : First, to introduce a methodology which seamlessly combines three approaches : the density functional based linear muffin-tin orbitals for self- consistently obtaining a sparse Hamiltonian; the generalized ... More
Random matrix ensembles with column/row constraints: part ISep 23 2014Aug 27 2015We analyze statistical properties of the complex system with conditions which manifests through specific constraints on the column/row sum of the matrix elements. The presence of additional constraints besides symmetry leads to new correlations among ... More
Identification of Bugs and Vulnerabilities in TLS Implementation for Windows Operating System Using State Machine LearningFeb 20 2019TLS protocol is an essential part of secure Internet communication. In past, many attacks have been identified on the protocol. Most of these attacks are due to flaws in protocol implementation. The flaws are due to improper design and implementation ... More
Criticality in Brownian ensemblesSep 23 2016May 03 2017The local statistical fluctuations in Brownian ensembles, the intermediate state of perturbation of one classical ensemble by another one, are system-size invariant if the perturbation parameter has the same size-dependence as that of the ensemble averaged ... More
Criticality in Brownian ensemblesSep 23 2016Oct 10 2016The local statistical fluctuations in Brownian ensembles, the intermediate state of perturbation of one classical ensemble by another one, are system-size invariant if the perturbation parameter has the same size-dependence as that of the ensemble averaged ... More
Random matrix ensembles with column/row constraints. IIAug 27 2015We numerically analyze the random matrix ensembles of real-symmetric matrices with column/row constraints for many system conditions e.g. disorder type, matrix-size and basis-connectivity. The results reveal a rich behavior hidden beneath the spectral ... More
Re-evaluating the need for Modelling Term-Dependence in Text Classification ProblemsOct 25 2017A substantial amount of research has been carried out in developing machine learning algorithms that account for term dependence in text classification. These algorithms offer acceptable performance in most cases but they are associated with a substantial ... More
Quantum cluster algorithm for frustrated Ising models in a transverse fieldDec 03 2015Working within the stochastic series expansion framework, we introduce and characterize a new quantum cluster algorithm for quantum Monte Carlo simulations of transverse field Ising models with frustrated Ising exchange interactions. As a demonstration ... More
Entanglement entropy of a quantum unbinding transition and entropy of DNAOct 10 2011Mar 30 2012Two significant consequences of quantum fluctuations are entanglement and criticality. Entangled states may not be critical but a critical state shows signatures of universality in entanglement. A surprising result found here is that the entanglement ... More
Classical integrability in the BTZ black holeMay 03 2011May 27 2011Using the fact the BTZ black hole is a quotient of AdS_3 we show that classical string propagation in the BTZ background is integrable. We construct the flat connection and its monodromy matrix which generates the non-local charges. From examining the ... More
Structure constants of $β$ deformed super Yang-MillsJul 15 2013Oct 08 2013We study the structure constants of the ${\cal N}=1$ beta deformed theory perturbatively and at strong coupling. We show that the planar one loop corrections to the structure constants of single trace gauge invariant operators in the scalar sector is ... More
Spinning strings and minimal surfaces in $AdS_3$ with mixed 3-form fluxesMay 12 2014Sep 22 2014Motivated by the recent proposal for the S-matrix in $AdS_3\times S^3$ with mixed three form fluxes, we study classical folded string spinning in $AdS_3$ with both Ramond and Neveu-Schwarz three form fluxes. We solve the equations of motion of these strings ... More
Signature of special behaviours of $1/r^2$ interaction in the quantum entanglement entropyJul 11 2012Oct 04 2012We study the bipartite von Neumann entropy of two particles interacting via a long-range scale-free potential $V(r)\sim -g/r^2$ in three dimensions, close to the unbinding transition. The nature of the quantum phase transition changes from critical ($-3/4<g<1/4$) ... More
Thermodynamics as a nonequilibrium path integralNov 15 2009Apr 21 2010Thermodynamics is a well developed tool to study systems in equilibrium but no such general framework is available for non-equilibrium processes. Only hope for a quantitative description is to fall back upon the equilibrium language as often done in biology. ... More
Non-deterministic Behavior of Ranking-based Metrics when Evaluating EmbeddingsJun 19 2018Feb 20 2019Embedding data into vector spaces is a very popular strategy of pattern recognition methods. When distances between embeddings are quantized, performance metrics become ambiguous. In this paper, we present an analysis of the ambiguity quantized distances ... More
Local Binary Pattern for Word Spotting in Handwritten Historical DocumentApr 20 2016Apr 21 2016Digital libraries store images which can be highly degraded and to index this kind of images we resort to word spot- ting as our information retrieval system. Information retrieval for handwritten document images is more challenging due to the difficulties ... More
Effect of doping on the electronic properties of Graphene and T-graphene : A theoretical approachOct 13 2015May 18 2017In this communication we present together four distinct techniques for the study of electronic structure of solids : the tight-binding linear muffin-tin orbitals (TB-LMTO), the real space and augmented space recursions and the modified exchange-correlation. ... More
Collider constraints on Gauss-Bonnet coupling in warped geometry modelAug 07 2013Aug 17 2013In this paper the requirement of a warp solution in an Einstein-Gauss-Bonnet 5D warped geometry is shown to fix the signature of Gauss-Bonnet coupling ($\alpha_{5}$). Further, imposing the phenomenological constraints, obtained from the recently observed ... More
Non-Standard Neutrino Interactions in a Modified $ν$2HDMApr 16 2018Sep 06 2018In the traditional neutrinophilic two-Higgs doublet model ($\nu$2HDM), there is no non-standard neutrino interaction (NSI) as the interactions between the Standard Model fermions with neutrinos are negligibly small due to the tiny mixing of the two scalar ... More
Extended states with Poisson spectral statisticsJan 09 2017Contrary to prevailing notion we find that the spectrum associated with the extended states in a complex system may belong to the Poisson universality class if the system is subjected to a specific set of constraints. Our results are based on an exact ... More
750 GeV Diphoton excess from Gauged $B-L$ SymmetryJan 05 2016Jun 09 2016We show that the recently observed 750 GeV diphoton excess at LHC can be due to the decay of a $SU(2)_L$ singlet scalar particle having 3 units of charge under gauged $B - L$ symmetry. Such a particle arises as an essential ingredient of recently studied ... More
Renormalization Group Limit Cycle for Three-Stranded DNAAug 16 2012Dec 19 2012We show that there exists an Efimov-like three strand DNA bound state at the duplex melting point and it is described by a renormalization group limit cycle. A nonperturbative RG is used to obtain this result in a model involving short range pairing only. ... More
Elasto-plastic response of reversibly crosslinked biopolymer bundlesMay 19 2014We study the response of F-actin bundles to driving forces through a simple analytical model. We consider two filaments connected by reversibly bound crosslinks and driven by an external force. Two failure modes under load can be defined. \textit{Brittle ... More
Microscopic modeling of mass and charge distributions in the spontaneous fission of 240PuOct 27 2015In this letter, we outline a methodology to calculate microscopically mass and charge distributions of spontaneous fission yields. We combine the multi-dimensional minimization of collective action for fission with stochastic Langevin dynamics to track ... More
Approximation Algorithm for N-distance Minimal Vertex Cover ProblemJun 09 2016Evolution of large scale networks demand for efficient way of communication in the networks. One way to propagate information in the network is to find vertex cover. In this paper we describe a variant of vertex cover problem naming it N-distance Vertex ... More
Status and Prospects of the Two-Higgs-Doublet SU(6)/Sp(6) little-Higgs Model and the Alignment LimitDec 17 2015Aug 01 2016We study in detail the little-Higgs model proposed by Low, Skiba and Smith with an SU(6)/Sp(6) group structure. The effective theory at the TeV scale is a two-Higgs doublet model (2HDM) with additional heavy vector-like fermions and vector-bosons. We ... More
Generating string solutions in BTZNov 22 2012Integrability of classical strings in the BTZ black hole enables the construction and study of classical string propagation in this background. We first apply the dressing method to obtain classical string solutions in the BTZ black hole. We dress time ... More
Stability of Rotating Self-Gravitating Filaments:Stability of Rotating Self-Gravitating Filaments: Effects of Magnetic FieldApr 18 2016We have performed systemmatic local linear stability analysis on a radially stratified infinite self-gravitating cylinder of rotating plasma under the influence of magnetic field. In order to render the system analytically tractable, we have focussed ... More
Efimov like phase of a three stranded DNA (Efimov-DNA) and the renormalization group limit cycleSep 29 2014Apr 10 2015A three-stranded DNA with short range base pairings only is known to exhibit a classical analog of the quantum Efimov effect, viz., a three chain bound state at the two chain melting point where no two are bound. By using a non-perturbative renormalization ... More
Tableau Correspondences and Representation TheoryAug 27 2018Aug 28 2018We deduce decompositions of natural representations of general linear groups and symmetric groups from combinatorial bijections involving tableaux. These include some of Howe's dualities, Gelfand models, the Schur-Weyl decomposition of tensor space, and ... More
A Generalized Performance Evaluation Framework for Parallel Systems with Output SynchronizationDec 16 2016Frameworks, such as MapReduce and Hadoop are abundant nowadays. They seek to reap benefits of parallelization, albeit subject to a synchronization constraint at the output. Fork-Join (FJ) queuing models are used to analyze such systems. Arriving jobs ... More
On the Helium fingers in the intracluster mediumFeb 06 2017Apr 11 2017In this paper we investigate the convection phenomenon in the intracluster medium (the weakly-collisional magnetized inhomogeneous plasma permeating galaxy clusters) where the concentration gradient of the Helium ions is not ignorable. To this end, we ... More
Extra Neutral Scalars with Vector-like Fermions at the LHCApr 05 2015Jan 23 2016Many theories beyond the standard model (BSM) contain new CP-odd and CP-even neutral scalars $\phi = \{A,H\}$, and new vector-like fermions ($\psi_{VL}$). The couplings of the CP-odd scalar $A$ to two standard model (SM) gauge bosons cannot occur from ... More
A Framework for Searching AND/OR Graphs with CyclesMay 01 2003Search in cyclic AND/OR graphs was traditionally known to be an unsolved problem. In the recent past several important studies have been reported in this domain. In this paper, we have taken a fresh look at the problem. First, a new and comprehensive ... More
Effect of disorder on the optical response of NiPt and Ni$_3$Pt alloysMay 18 2017May 20 2017In this communication we present a detailed study of the effect of chemical disorder on the optical response of Ni$_{1-x}$Pt$_x$ (0.1$\leq$ x $\leq$0.75) and Ni$_{3(1-x)/3}$Pt$_x$ (0.1$\leq$ x $\leq$0.3). We shall propose a formalism which will combine ... More
Cutoff of IceCube Neutrino Spectrum due to t-channel Resonant Absorption by C$ν$BAug 03 2018Mar 26 2019The non-observation of neutrinos by the IceCube at the Glashow resonance energy of 6.3 PeV has been a long standing unresolved issue. In this paper we propose a t-channel neutrino absorption by the C$\nu$B, which causes a cutoff at 4.5 PeV neutrino energy, ... More
Effect of doping on the electronic properties of Graphene and T-graphene : A theoretical approachOct 13 2015Jun 07 2016Graphene,a two-dimensional counterpart of three-dimensional graphite, has attracted significant interest, because of its distinctive electrical and mechanical properties, for developing electronic, optoelectronic, and sensor technologies.
Cyber Attack Thread: A Control-flow Based Approach to Deconstruct and Mitigate Cyber ThreatsJun 10 2016Attacks in cyberspace have got attention due to risk at privacy, breach of trust and financial losses for individuals as well as organizations. In recent years, these attacks have become more complex to analyze technically, as well as to detect and prevent ... More
From Extended theories of Gravity to Dark MatterMay 13 2016In this work, we propose different models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of a dark matter (DM) candidate, without ad-hoc additions to the Standard Model (SM). We modify the gravity ... More
Can Dark Matter be an artifact of extended theories of gravity?Dec 27 2015Aug 18 2016In this article, we propose different background models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of genesis of dark matter without affecting the SM particle sector. We modify the gravity ... More
Lepton Portal Limit of Inert Higgs Doublet Dark Matter with Radiative Neutrino MassMar 25 2017We study an extension of the Inert Higgs Doublet Model (IHDM) by three copies of right handed neutrinos and heavy charged leptons such that both the inert Higgs doublet and the heavy fermions are odd under the $Z_2$ symmetry of the model. The neutrino ... More
TYPE II DNA: when the interfacial energy becomes negativeSep 06 2010Dec 26 2012An important step in transcription of a DNA base sequence to a protein is the initiation from the exact starting point, called promoter region. We propose a physical mechanism for identification of the promoter region, which relies on a new classification ... More
A novel undamped gapless plasmon mode in tilted type-II Dirac semimetalApr 23 2019We predict the existence of a novel long-lived gapless plasmon mode in a type-II Dirac semimetal (DSM). This gapless mode arises from the out-of-phase oscillations of the density fluctuations in the electron and the hole pockets of a type-II DSM. It originates ... More
Gravitomagnetism and Pulsar Beam Precession near a Kerr Black HoleNov 11 2017Jan 18 2019A rotating black hole causes the spin-axis of a nearby pulsar to precess due to geodetic and gravitomagnetic frame-dragging effects. The aim of our theoretical work here is to explore how this spin-precession can modify the rate at which pulses are received ... More
Thermal Fluctuations Enhance Order-from-Disorder of Quantum Correlations in Quenched Disordered Spin ModelsDec 29 2014We consider paradigmatic quenched disordered quantum spin models, viz., the XY spin glass and random-field XY models, and show that quenched averaged quantum correlations can exhibit the order-from-disorder phenomenon for finite-size systems as well as ... More
Dynamical phase transition of a periodically driven DNAApr 13 2012Feb 10 2013Replication and transcription are two important processes in living systems. To execute such processes, various proteins work far away from equilibrium in a staggered way. Motivated by this, aspects of hysteresis during unzipping of DNA under a periodic ... More
Probing Inert Doublet Model using jet substructure with multivariate analysisMay 10 2019We explore the challenging but phenomenologically interesting hierarchical mass spectrum of Inert Doublet Model where relatively light dark matter along with much heavier scalar states can fully satisfy the constraints on the relic abundance and also ... More
Fracture of Composites: Simulation by a Spring Network ModelApr 03 2010Composite materials are often stronger than their constituents. We demonstrate this through a spring network model on a square lattice. Two different types of sites (A and B) are distributed randomly on the lattice, representing two different constituents. ... More
Disorder induced lifetime effects in binary disordered systems : a first principles formalism and an application to doped GrapheneJan 12 2017May 18 2017In this work the conducting properties of graphene lattice with a particular concentration of defect (5\% and 10\%) has been studied. The real space block recursion method introduced by Haydock et al. has been used in presence of the random distribution ... More
Similarities between the structure functions of thermal convection and hydrodynamic turbulenceMar 03 2019In this paper, we analyze the scaling of velocity structure functions of turbulent thermal convection. Using high-resolution numerical simulations, we show that the structure functions scale similar to those of hydrodynamic turbulence, with the scaling ... More
Quantum-Mechanical Relation between Atomic Dipole Polarizability and the van der Waals RadiusMar 30 2018Sep 04 2018The atomic dipole polarizability, $\alpha$, and the van der Waals (vdW) radius, $R_{\rm vdW}$, are two key quantities to describe vdW interactions between atoms in molecules and materials. Until now, they have been determined independently and separately ... More
Effect of Composition Gradient on Magnetothermal Instability Modified by Shear and RotationOct 27 2017We model the intracluster medium as a weakly collisional plasma that is a binary mixture of the hydrogen and the helium ions, along with free electrons. When, owing to the helium sedimentation, the gradient of the mean molecular weight (or equivalently, ... More
Doodle to Search: Practical Zero-Shot Sketch-based Image RetrievalApr 06 2019In this paper, we investigate the problem of zero-shot sketch-based image retrieval (ZS-SBIR), where human sketches are used as queries to conduct retrieval of photos from unseen categories. We importantly advance prior arts by proposing a novel ZS-SBIR ... More
Learning Cross-Modal Deep Embeddings for Multi-Object Image Retrieval using Text and SketchApr 28 2018In this work we introduce a cross modal image retrieval system that allows both text and sketch as input modalities for the query. A cross-modal deep network architecture is formulated to jointly model the sketch and text input modalities as well as the ... More
SigNet: Convolutional Siamese Network for Writer Independent Offline Signature VerificationJul 07 2017Sep 30 2017Offline signature verification is one of the most challenging tasks in biometrics and document forensics. Unlike other verification problems, it needs to model minute but critical details between genuine and forged signatures, because a skilled falsification ... More
Configuration and Self-averaging in disordered systemsApr 27 2014Sep 24 2015The main aim of this work is to present two different methodologies for configuration averaging in disordered systems. The Recursion method is suitable for the calculation of spatial or self-averaging, while the Augmented space formalism averages over ... More
Desiccation of a clay film: Cracking versus peelingMay 19 2008Cracking and peeling of a layer of clay on desiccation has been simulated using a spring model. A vertical section through the layer with finite thickness is represented by a rectangular array of nodes connected by linear springs on a square lattice. ... More
Static and dynamical quantum correlations in phases of an alternating field XY modelMay 24 2016Jan 09 2017We investigate the static and dynamical patterns of entanglement in an anisotropic XY model with an alternating transverse magnetic field, which is equivalent to a two-component one-dimensional Fermi gas on a lattice, a system realizable with current ... More
Spontaneous fission lifetimes from the minimization of self-consistent collective actionOct 08 2013The spontaneous fission lifetime of 264Fm has been studied within nuclear density functional theory by minimizing the collective action integral for fission in a two-dimensional quadrupole collective space representing elongation and triaxiality. The ... More
Multipartite Entanglement Accumulation in Quantum States: Localizable Generalized Geometric MeasureNov 12 2015Multiparty quantum states are useful for a variety of quantum information and computation protocols. We define a multiparty entanglement measure based on local measurements on the multiparty quantum state, and an entanglement measure averaged on the post-measurement ... More
Response of entanglement to annealed vis-à-vis quenched disorder in quantum spin modelsDec 14 2017We investigate bipartite entanglement in random quantum $XY$ models at equilibrium. Depending on the intrinsic time scales associated with equilibration of the random parameters and measurements associated with observation of the system, we consider two ... More
A dynamical model calculation to reconcile the nuclear fission lifetime from different measurement techniquesJun 20 2018The pre-scission particle multiplicities suggest a lifetime of 10 20 s for the nuclear fission to occur which is in contrast to the fission lifetime 10 18 s as predicted by atomic probe. This long standing ambiguity, arising due to the orders of magnitude ... More
Cluster radioactivity of $^{294}_{118}$Og$_{176}$Dec 16 2018According to theory, cluster radioactivity becomes an important decay mode in superheavy nuclei. In this work, we predict that the strongly-asymmetric fission, or cluster emission, is in fact the dominant fission channel for $^{294}_{118}$Og$_{176}$, ... More
Band-gap tuning and optical response of two-dimensional Si$_x$C$_{1-x}$: A first-principles real space study of disordered 2D materialsDec 22 2016Sep 08 2017We present a real-space formulation for calculating the electronic structure and optical conductivity of such random alloys based on the Kubo-Greenwood formalism interfaced with the augmented space recursion (ASR) [A. Mookerjee, J. Phys. C: Solid State ... More
Enhancement of Quantum Correlation Length in Quenched Disordered Spin ChainsMar 16 2015Classical correlations of ground states typically decay exponentially and polynomially, respectively for gapped and gapless short-ranged quantum spin systems. In such systems, entanglement decays exponentially even at the quantum critical points. However, ... More
Statistics of leading digits leads to unification of quantum correlationsSep 30 2015Jul 26 2016We show that the frequency distribution of the first significant digits of the numbers in the data sets generated from a large class of measures of quantum correlations, which are either entanglement measures, or belong to the information-theoretic paradigm, ... More
Pairing-induced speedup of nuclear spontaneous fissionOct 06 2014Collective inertia is strongly influenced at the level crossing at which quantum system changes diabatically its microscopic configuration. Pairing correlations tend to make the large-amplitude nuclear collective motion more adiabatic by reducing the ... More
Scale-invariant freezing of entanglementOct 03 2016We show that bipartite entanglement can be frozen over time with a proper choice of the many-body substrate, which is in contact with one, or more than one environments via a repetitive interaction. Choosing the one-dimensional anisotropic XY model in ... More
Phase boundaries in alternating field quantum XY model with Dzyaloshinskii-Moriya interaction: Sustainable entanglement in dynamicsOct 30 2017Feb 26 2019We report all phases and corresponding critical lines of the quantum anisotropic transverse XY model with Dzyaloshinskii-Moriya (DM) interaction along with uniform and alternating transverse magnetic fields (ATXY) by using appropriately chosen order parameters. ... More
Static and dynamical quantum correlations in phases of an alternating field XY modelMay 24 2016We investigate the static and dynamical patterns of entanglement in an anisotropic XY model with an alternating transverse magnetic field, which is equivalent to a two-component one-dimensional Fermi gas on a lattice, a system realizable with current ... More
Constraining wrong-sign $hbb$ couplings with $h \rightarrow Υ γ$Jul 26 2016The rare decay $h \rightarrow \Upsilon \gamma$ has a very small rate in the Standard Model, due to a strong cancellation between the direct and indirect diagrams. Models with a changed $hbb$ coupling can thus lead to a great increase in this decay. Current ... More
Scale-invariant freezing of entanglementOct 03 2016Aug 19 2018We show that bipartite entanglement in a one-dimensional quantum spin model undergoing time-evolution under local Markovian environments can be frozen over time. We demonstrate this by using a number of paradigmatic quantum spin models in one dimension, ... More
Cluster radioactivity of $^{294}_{118}$Og$_{176}$Dec 16 2018May 03 2019According to theory, cluster radioactivity becomes an important decay mode in superheavy nuclei. In this work, we predict that the strongly-asymmetric fission, or cluster emission, is in fact the dominant fission channel for $^{294}_{118}$Og$_{176}$, ... More
Quantum discord and its allies: a reviewMar 30 2017We review concepts and methods associated with quantum discord and related topics. We also describe their possible connections with other aspects of quantum information and beyond, including quantum communication, quantum computation, many-body physics, ... More
Skin disease identification from dermoscopy images using deep convolutional neural networkJul 24 2018In this paper, a deep neural network based ensemble method is experimented for automatic identification of skin disease from dermoscopic images. The developed algorithm is applied on the task3 of the ISIC 2018 challenge dataset (Skin Lesion Analysis Towards ... More
A New Semantic Web Approach for Constructing, Searching and Modifying Ontology DynamicallyJan 30 2011Semantic web is the next generation web, which concerns the meaning of web documents It has the immense power to pull out the most relevant information from the web pages, which is also meaningful to any user, using software agents. In today's world, ... More
Thermodynamic relations for DNA phase transitionsJan 21 2014Apr 22 2014The force induced unzipping transition of a double stranded DNA is considered from a purely thermodynamic point of view. This analysis provides us with a set of relations that can be used to test microscopic theories and experiments. The thermodynamic ... More
Dirac cone in a non-honeycomb surface alloyDec 16 2018We demonstrate unexpected occurrence of linear bands resembling Dirac cone at the zone-center of Au$_2$Sn surface alloy with $\left( \begin{smallmatrix} 2&1\\ 1&3 \end{smallmatrix} \right)$ surface structure formed by deposition of about 0.9 ML Sn on ... More
Evaluation of the Effect of Improper Segmentation on Word SpottingApr 21 2016Word spotting is an important recognition task in historical document analysis. In most cases methods are developed and evaluated assuming perfect word segmentations. In this paper we propose an experimental framework to quantify the effect of goodness ... More
Influence of anti-site disorder and electron-electron correlations on the electronic structure of CeMnNi$_4$Oct 04 2018CeMnNi$_4$ exhibits an unusually large spin polarization, but its origin has baffled researchers for more than a decade. We use bulk sensitive hard x-ray photoelectron spectroscopy (HAXPES) and density functional theory based on the Green's function technique ... More
Quasiperiodic Sn layerApr 22 2017Quasicrystalline materials exhibit aperiodic long range order and forbidden rotational symmetries, but show sharp diffraction spots. Although quasicrystals were discovered more than 30 years ago, elemental quasicrystals have remained elusive so far. Here, ... More
First observation of the competing fission modes in the neutron-deficient sub-lead regionApr 05 2018Dec 21 2018Fragment mass distributions from fission of excited compound nucleus $^{178}$Pt have been deduced from the measured fragment velocities. The $^{178}$Pt nucleus was created at the JAEA tandem facility in a complete fusion reaction $^{36}$Ar + $^{142}$Nd, ... More
Direct Evidence of Washing out of Nuclear Shell EffectsApr 17 2015Constraining excitation energy at which nuclear shell effect washes out has important implications on the production of super heavy elements and many other fields of nuclear physics research. We report the fission fragment mass distribution in alpha induced ... More
Energy and enstrophy spectra and fluxes for the inertial-dissipation range of two-dimensional turbulenceFeb 10 2019n this paper, using Pao's conjecture [Y.-H. Pao, Phys. Fluids 11, 1371 (1968)], we derive expressions for the spectra and fluxes of kinetic energy and enstrophy for two-dimensional (2D) forced turbulence that extend beyond the inertial range. In these ... More
Beating no-go theorems by engineering defects in quantum spin modelsJun 27 2014There exist diverse no-go theorems, ranging from no-cloning to monogamies of quantum correlations and Bell inequality violations, which restrict the processing of information in the quantum world. In a multipartite scenario, monogamy of Bell inequality ... More
Warped Extra Dimensional Benchmarks for Snowmass 2013Sep 30 2013The framework of a warped extra dimension with the Standard Model (SM) fields propagating in it is a very well-motivated extension of the SM since it can address both the Planck-weak and flavor hierarchy problems of the SM. We consider signals at the ... More
Emergence of entanglement with temperature and time in factorization-surface statesMay 27 2017Jun 08 2018There exist zero-temperature states in quantum many-body systems that are fully factorized, thereby possessing vanishing entanglement, and hence being of no use as resource in quantum information processing tasks. Such states can become useful for quantum ... More
Multipartite Entanglement Accumulation in Quantum States: Localizable Generalized Geometric MeasureNov 12 2015Feb 13 2017Multiparty quantum states are useful for a variety of quantum information and computation protocols. We define a multiparty entanglement measure based on local measurements on a multiparty quantum state, and an entanglement measure averaged on the post-measurement ... More