Latest in cond-mat.other

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Transport and Phonon Damping in $^{\bf 4}$HeMay 12 2019The dynamic structure function $S(k,\omega)$ informs about the dispersion and damping of excitations. We have recently (Phys. Rev. B {\bf 97}, 184520 (2018)) compared experimental results for $S(k,\omega)$ from high-precision neutron scattering experiment ... More
Optical heterodyne imaging of magnons in 1D magnonic crystalsMay 12 2019Periodic modulation of magnetic permeability by artificial structures called magnonic crystals results in modifying the band structures of magnetostatic modes. Magnonic crystal could be leveraged to manipulate propagation and localization of magnons in ... More
Polaronic inter-acceptor hopping transport in intrinsically doped nickel oxideMay 09 2019In this work, we revisit the issue of the nature of electronic transport in nickel oxide (NiO) and show that the widely used model of free small polaron hopping, initially raised to characterize transport in high-purity samples, is not appropriate for ... More
Non-equilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membraneMay 09 2019Recently, a novel kind of hybrid atom-optomechanical system, consisting of atoms in a lattice coupled to a membrane, has been experimentally realized [Vochezer {\it et al.,} Phys. Rev. Lett. \textbf{120}, 073602 (2018)], which promises a viable contender ... More
Non-linear Fluctuating Hydrodynamics with many conserved fields: the case of a 3D anharmonic chainMay 08 2019We propose a model for a chain vibrating in 3 dimensions (3D), with first neighbors anharmonic interatomic potential which depends on their distance, and subjected to an external tension. In the framework of the non-linear fluctuating hydrodynamic theory ... More
Demonstration of full tensor current density imaging using ultra-low field MRIMay 08 2019Direct imaging of impressed dc currents inside the head can provide valuable conductivity information, possibly improving electro-magnetic neuroimaging. Ultra-low field magnetic resonance imaging (ULF MRI) at $\mu$T Larmor fields can be utilized for current ... More
Principles of Information Storage in Small-Molecule MixturesMay 06 2019Molecular data systems have the potential to store information at dramatically higher density than existing electronic media. Some of the first experimental demonstrations of this idea have used DNA, but nature also uses a wide diversity of smaller non-polymeric ... More
Assisted distillation of Gaussian resourcesMay 06 2019In spite of their outstanding experimental relevance, Gaussian operations in continuous-variable quantum systems are subjected to fundamental limitations, as it is known that general resources cannot be distilled within the Gaussian paradigm. We show ... More
Expectation value of $p^6$ in continuous two-piece symmetric potential wellsMay 06 2019Earlier, potentials like square well and several other half-potential wells with discontinuous jump have been found to have the expectation value $<\! p^6 \!>$ to be divergent for all bound states. Here, we consider two-piece symmetric potential wells ... More
Phonon wind and drag of excitons in monolayer semiconductorsMay 05 2019We study theoretically the non-equilibrium exciton transport in monolayer transition metal dichalcogenides. We consider the situation where excitons interact with non-equilibrium phonons, e.g., under the conditions of localized excitation where a ``hot ... More
Plasticity induced superclimb in solid Helium-4: Direct and inverse effectsMay 04 2019During the last decade experimental evidence is building that the mass supertransport through solid Helium-4 as well as the anomalously large matter accumulation in the bulk -- the giant isochoric compressibility (aka the syringe effect) -- are both supported ... More
Plasticity induced superclimb in solid Helium-4: Direct and inverse effectsMay 04 2019May 10 2019During the last decade experimental evidence is building that the mass supertransport through solid Helium-4 as well as the anomalously large matter accumulation in the bulk -- the giant isochoric compressibility (aka the syringe effect) -- are both supported ... More
Exotic pairing state in quasicrystalline superconductors under magnetic fieldMay 04 2019We theoretically study the effect of a magnetic field on quasicrystalline superconductors, by modelling them as the attractive Hubbard model on the Penrose-tiling structure. We find that at low temperatures and under a high magnetic field there appears ... More
Optimization and learning of quantum programsMay 03 2019A programmable quantum processor is a fundamental model of quantum computation. In this model, any quantum channel can be approximated by applying a fixed universal quantum operation onto an input state and a quantum `program' state, whose role is to ... More
Convex optimization of programmable quantum computersMay 03 2019A fundamental model of quantum computation is the programmable quantum gate array. This is a quantum processor which is fed by a program state that induces a corresponding quantum operation on input states. While being programmable, any finite-dimensional ... More
First Principles Study of Electronic Structure and Fermi Surface in Rare-earth Filled Skutterudites RPt4Ge12May 01 2019Experiments on rare-earth filled skutterudites demonstrate an intriguing array of thermodynamic, transport and superconducting properties, and bring to fore theoretical challenges posed by f-electron systems. First principle calculations based density ... More
Ultrathin complex oxide nanomechanical resonatorsApr 30 2019Complex oxide thin films and heterostructures exhibit a profusion of exotic phenomena, often resulting from the intricate interplay between film and substrate. Recently it has become possible to isolate epitaxially grown single-crystalline layers of these ... More
Quantum Evaporation of Classical BreathersApr 29 2019We apply the recently discovered classical-quantum correspondence (CQC) to study the quantum evaporation of breathers in an extended sine-Gordon model. We present numerical results for the decay rate of the breather as a function of the coupling strength ... More
Certified Quantum Measurement of Majorana FermionsApr 27 2019We present a quantum self-testing protocol to certify measurements of fermion parity involving Majorana fermion modes. We show that observing a set of ideal measurement statistics implies anti-commutativity of the implemented Majorana fermion parity operators, ... More
Experimental demonstration of asymmetric diffraction based on a passive parity-time-symmetric acoustic gratingApr 26 2019Passive parity-time-symmetric medium provides a feasible scheme to investigate non-Hermitian systems experimentally. Here, we design a passive PT-symmetric acoustic grating with a period equal to exact PT-symmetric medium. This treatment enhances the ... More
Galactic dynamics and long-range quantum gravityApr 26 2019We explore in a systematic way the possibility that long-range quantum gravity effects could play a role at galactic scales and could be responsible for the phenomenology commonly attributed to dark matter. We argue that the presence of baryonic matter ... More
Galactic dynamics and long-range quantum gravityApr 26 2019May 06 2019We explore in a systematic way the possibility that long-range quantum gravity effects could play a role at galactic scales and could be responsible for the phenomenology commonly attributed to dark matter. We argue that the presence of baryonic matter ... More
Fractonic Chern-Simons and BF theoriesApr 25 2019Fracton order is an intriguing new type of order which shares many common features with topological order, such as topology-dependent ground state degeneracies, and excitations with mutual statistics. However, it also has several distinctive geometrical ... More
On asymptotic behaviour in truncated conformal space approachApr 21 2019The Truncated conformal space approach (TCSA) is a numerical technique for finding finite size spectrum of Hamiltonians in quantum field theory described as perturbations of conformal field theories. The truncation errors of the method have been systematically ... More
Sub-terahertz ferrimagnetic spin-transfer torque oscillatorApr 19 2019A theory of magnetization dynamics in ferrimagnetic materials with antiparallel aligned spin sub-lattices under action of spin-transfer torques (STT) is developed. We consider magnetization dynamics in GdFeCo layers in two cases of magnetic anisotropy: ... More
Spatial dispersion of the high-frequency conductivity of two-dimensional electron gas subjected to a high electric field: collisionless caseApr 18 2019We present the analysis of high-frequency (dynamic) conductivity with the spatial dispersion, $\sigma (\omega, {\bf q})$, of two-dimensional electron gas subjected to a high electric field. We found that at finite wavevector, ${\bf q}$, and at high fields, ... More
Magnonic Analogue Black/White Hole Horizon in Superfluid $^3$He-B: experimentApr 18 2019We provide experimental details of the first experiment made in zero temperature limit ($\sim$ 600\,$\mu$K) studying the magnonic black/white hole horizon analogue using absolutely pure physical system based on the spin superfluidity in superfluid $^3$He-B. ... More
A Weyl geometric model for thermo-mechanics of solids with metrical defectsApr 15 2019We seek a rational route to large-deformation, thermo-mechanical modeling of solids with metrical defects. It assumes the reference and deformed geometries to be of the Weyl type and introduces the Weyl one-form -- an additional set of degrees of freedom ... More
Mode I and II Interlaminar Fracture in Laminated Composites: A Size Effect StudyApr 15 2019This work investigates the mode I and II interlaminar fracturing behavior of laminated composites and the related size effects. Fracture tests on geometrically scaled Double Cantilever Beam (DCB) and End Notch Flexure (ENF) specimens were conducted to ... More
Vortex Lattice in a Rotating Holographic SuperfluidApr 14 2019By utilizing the AdS/CFT correspondence, we explore the dynamics of strongly coupled superfluid vortices in a disk with a constant angular velocity. Each vortex in the vortex lattice is quantized with vorticity one from direct inspection of its phase. ... More
Vortex Lattice in a Rotating Holographic SuperfluidApr 14 2019May 03 2019By utilizing the AdS/CFT correspondence, we explore the dynamics of strongly coupled superfluid vortices in a disk with constant angular velocity. Each vortex in the vortex lattice is quantized with vorticity one from the direct inspection of their phases. ... More
Coarse-grained Hydrodynamics of turbulent superfluids: HVBK vs HST. Comment to discussion section of INT 2019-1a programApr 14 2019Apr 17 2019In the comment I develop a critical analysis of the use of the HVBK method for the study of three-dimensional turbulent flows of superfluids. The conception of the vortex bundles forming the structure of quantum turbulence is controversial and does not ... More
Aharonov-Bohm rings in de Sitter expanding universeApr 14 2019Apr 17 2019The $(1+3)$-dimensional Dirac equation of the fermions moving in ideal Aharonov-Bohm rings in the de Sitter expanding universe is used for deriving the exact expressions of the general relativistic partial currents and corresponding energies. In the de ... More
Aharonov-Bohm rings in de Sitter expanding universeApr 14 2019The $(1+3)$-dimensional Dirac equation of the fermions moving in ideal Aharonov-Bohm rings in the de Sitter expanding universe is used for deriving the exact expressions of the general relativistic partial currents and corresponding energies. In the de ... More
Radiofrequency driving of coherent electron spin dynamics in $n$-GaAs detected by Faraday rotationApr 10 2019We suggest a new pump-probe method for studying semiconductor spin dynamics based on pumping of carrier spins by a pulse of oscillating radiofrequency (RF) magnetic field and probing by measuring the Faraday rotation of a short laser pulse. We demonstrate ... More
Radiofrequency driving of coherent electron spin dynamics in $n$-GaAs detected by Faraday rotationApr 10 2019Apr 24 2019We suggest a new pump-probe method for studying semiconductor spin dynamics based on pumping of carrier spins by a pulse of oscillating radiofrequency (rf) magnetic field and probing by measuring the Faraday rotation of a short laser pulse. We demonstrate ... More
Two-photon Rabi-Hubbard and Jaynes-Cummings-Hubbard models: photon pair superradiance, Mott insulator and normal phasesApr 10 2019Apr 13 2019We study the ground state phase diagrams of two-photon Dicke, the one-dimensional Jaynes-Cummings-Hubbard (JCH), and Rabi-Hubbard (RH) models using mean field, perturbation, quantum Monte Carlo (QMC), and density matrix renormalization group (DMRG) methods. ... More
Two-photon Rabi-Hubbard and Jaynes-Cummings-Hubbard models: photon pair superradiance, Mott insulator and normal phasesApr 10 2019We study the ground state phase diagrams of two-photon Dicke, the one-dimensional Jaynes-Cummings-Hubbard (JCH), and Rabi-Hubbard (RH) models using mean field, perturbation, quantum Monte Carlo (QMC), and density matrix renormalization group (DMRG) methods. ... More
The Quantum Cocktail Party ProblemApr 10 2019Apr 16 2019The cocktail party problem refers to the famous selective attention problem of how to find out the signal of each individual sources from signals of a number of detectors. In the classical cocktail party problem, the signal of each source is a sequence ... More
Modeling tumorspheres reveals cancer stem cell niche building and plasticityApr 09 2019Cancer stem cells have been shown to be critical to the development of a variety of solid cancers. The precise interplay mechanisms between cancer stem cells and the rest of a tissue are still not elucidated. To shed light on the interactions between ... More
Modeling tumorspheres reveals cancer stem cell niche building and plasticityApr 09 2019May 14 2019Cancer stem cells have been shown to be critical to the development of a variety of solid cancers. The precise interplay mechanisms between cancer stem cells and the rest of a tissue are still not elucidated. To shed light on the interactions between ... More
Angular momentum compensation manipulation to room temperature of the ferrimagnet Ho$_{3-x}$Dy$_x$Fe$_5$O$_{12}$ detected by the Barnett effectApr 09 2019We demonstrate that the angular momentum compensation temperature $T_A$, at which the net angular momentum in the sample disappears, can be controlled in Ho$_3$Fe$_5$O$_{12}$ by partially substituting Dy for Ho. The $T_A$ can be detected using the Barnett ... More
Bound states in the Brillouin zone continuumApr 08 2019Systems with space-periodic Hamiltonians have unique scattering properties. The discrete translational symmetry associated with periodicity of the Hamiltonian creates scattering channels that govern the scattering process. We consider a two-dimensional ... More
Raman stimulated neutrino pair emissionApr 08 2019A new scheme using macroscopic coherence is proposed from a theoretical point to experimentally determine the neutrino mass matrix, in particular the absolute value of neutrino masses, and the mass type, Majorana or Dirac. The proposed process is a collective, ... More
The Field Theory of Specific HeatApr 07 2019Finite temperature quantum field theory in the heat kernel method is used to study the heat capacity of condensed matter. The lattice heat is treated a la P. Debye as energy of the elastic (sound) waves. The dimensionless functional of free energy is ... More
Floquet-engineering counterdiabatic protocols in quantum many-body systemsApr 05 2019Counterdiabatic (CD) driving presents a way of generating adiabatic dynamics at arbitrary pace, where excitations due to non-adiabaticity are exactly compensated by adding an auxiliary driving term to the Hamiltonian. While this CD term is theoretically ... More
Extendibility of bosonic Gaussian statesApr 04 2019Extendibility of bosonic Gaussian states is a key issue in continuous-variable quantum information. We show that a bosonic Gaussian state is $k$-extendible if and only if it has a Gaussian $k$-extension, and we derive a simple semidefinite program, whose ... More
Intervalley Polaron in Atomically Thin Transition Metal DichalcogenidesApr 04 2019We study theoretically intervalley coupling in transition-metal dichalcogenide monolayers due to electron interaction with short-wavelength phonons. We demonstrate that this intervalley polaron coupling results in (i) a renormalization of the conduction ... More
Second layer crystalline phase of helium films on graphiteApr 03 2019We investigate theoretically the existence at low temperature of a commensurate (4/7) crystalline phase of a layer of either He isotope on top of a He-4 layer adsorbed on graphite. We make use of a recently developed, systematically improvable variational ... More
Universal physics of bound states of a few charged particlesApr 01 2019We study few-body systems of charged particles subject to attractive short-range plus repulsive Coulomb interparticle forces. First, we focus on attractive potentials with a vanishing range. We discuss properties of the corresponding bound states, in ... More
Formula for the Number of Nambu-Goldstone ModesApr 01 2019When global continuous symmetries are spontaneously broken, there appear gapless collective excitations called Nambu-Goldstone modes (NGMs) that govern the low-energy property of the system. The application of this famous theorem ranges from high-energy, ... More
Mechanism of Electron Spin Relaxation in Spiral Magnetic StructuresApr 01 2019Spin dynamics in spiral magnetic structures has been investigated. It has been shown that the internal spatially dependent magnetic field in such structures produces a new mechanism of spin relaxation.
Vacuum fluctuation effects due to an Abelian gauge field in 2+1 dimensions, in the presence of moving mirrorsMar 31 2019We study the Dynamical Casimir Effect (DCE) due to an Abelian gauge field in 2+1 dimensions, in the presence of semitransparent, zero-width mirrors, which may move or deform in a time-dependent way. We obtain general expressions for the probability of ... More
$\mathcal{PT}$-symmetric tight-binding model with asymmetric couplingsMar 29 2019We study spectral and transport properties of one-dimensional tight-binding $\mathcal{PT}$-symmetric chains with alternating couplings. Based on the transfer matrix method, we have analytically developed the expressions for the transmission and reflection ... More
Externally Controlled Lotka-Volterra Dynamics in a Linearly Polarized Polariton FluidMar 29 2019Spontaneous formation of transverse patterns is ubiquitous in nonlinear dynamical systems of all kinds. An aspect of particular interest is the active control of such patterns. In nonlinear optical systems this can be used for all-optical switching with ... More
Dark vertical conductance of cavity-embedded semiconductor heterostructuresMar 27 2019We present a linear-response nonlocal theory of the electronic conductance along the vertical (growth) direction of a generic doped semiconductor heterostructure embedded in a single-mode cavity electromagnetic resonator in the absence of illumination. ... More
Photoswitchable Single-Walled Carbon Nanotubes for Super-Resolution Microscopy in the Near-InfraredMar 26 2019The design of single-molecule photoswitchable emitters was the first milestone toward the advent of single-molecule localization microscopy that sets a new paradigm in the field of optical imaging. Several photoswitchable emitters have been developed ... More
Delocalization of edge states in topological phasesMar 26 2019The presence of a topologically non-trivial discrete invariants implies the existence of gapless modes in finite samples, but it does not necessarily imply their localization. The disappearance of the indirect energy gap in the bulk generically leads ... More
Active topolectrical circuitsMar 25 2019We develop design principles for active topolectrical circuits (ATCs) by exploiting a mathematical correspondence between active mechanical metamaterials and nonlinear electronic circuits. Building on a generic nonlinear oscillator representation of active ... More
Detection of radiation torque exerted on an alkali-metal vapor cellMar 25 2019We have developed a torsion balance to detect the rotation of a cell containing spin-polarized gaseous atoms to study angular momentum transfer from gaseous atoms to solid. A cesium vapor cell was hung from a thin wire in a vacuum chamber, and irradiated ... More
Quantized alternate current on curved grapheneMar 23 2019Apr 12 2019Based on the numerical solution of the quantum lattice Boltzmann method in curved space, we predict the onset of a quantized alternating current on curved graphene sheets. Such numerical prediction is verified analytically via a set of semi-classical ... More
Quantized alternate current on curved grapheneMar 23 2019Based on the numerical solution of the quantum lattice Boltzmann method in curved space, we predict the onset of a quantized alternating current on curved graphene sheets. Such numerical prediction is verified analytically via a set of semi-classical ... More
Exceptional points in classical spin dynamicsMar 22 2019Non-conservative physical systems admit a special kind of spectral degeneracy, known as exceptional point (EP), at which eigenvalues and eigenvectors of the corresponding non-Hermitian Hamiltonian coalesce. Dynamical parametric encircling of the EP can ... More
Dense coding capacity of a quantum channelMar 21 2019We consider the fundamental protocol of dense coding of classical information assuming that noise affects both the forward and backward communication lines between Alice and Bob. Assuming that this noise is described by the same quantum channel, we define ... More
A Bipartite Kronig-Penney Model with Dirac Potential ScatterersMar 21 2019May 13 2019Here we present a simple extension to the age-old Kronig-Penney model, which is made to be bipartite by varying either the scatterer separations or the potential heights. In doing so, chiral (sublattice) symmetry can be introduced. When such a symmetry ... More
A Bipartite Kronig-Penny Model with Dirac Potential ScatterersMar 21 2019Mar 25 2019Here we present a simple extension to the age-old Kronig-Penny model through dimerisation of the system by varying the scatterer separations or potential heights. In doing so, the system is made to be bipartite and thus the potential for chiral (sublattice) ... More
Attraction Induced by Mutual Quantum Measurements of VelocityMar 21 2019We define the notion of mutual quantum measurements of two macroscopic objects and investigate the effect of these measurements on the velocities of the objects. We show that multiple mutual quantum measurements can lead to an effective force emerging ... More
Tracking the ultrafast motion of an antiferromagnetic order parameterMar 20 2019The unique functionalities of antiferromagnets offer promising routes to advance information technology. Their compensated magnetic order leads to spin resonances in the THz-regime, which suggest the possibility to coherently control antiferromagnetic ... More
Extended Falicov-Kimball model: Exact solution for finite temperaturesMar 19 2019The extended Falicov-Kimball model (EFKM) is analyzed exactly for finite temperatures in the limit of large dimensions. The onsite, as well as the intersite density-density interactions represented by the coupling constants $U$ and $V$, respectively, ... More
Landau level broadening, hyperuniformity, and discrete scale invarianceMar 19 2019We study the energy spectrum of a two-dimensional electron in the presence of both a perpendicular magnetic field and a potential. In the limit where the potential is small compared to the Landau level spacing, we show that the broadening of Landau levels ... More
Recycling knowledge to explore materials: a connector theory approachMar 19 2019Computational materials design often profits from the fact that a part of the complicated interaction contributions is not calculated for the real material, but replaced by results of models such as the homogeneous electron gas. We turn this approximation ... More
Probing Weyl Physics with One-dimensional Sonic CrystalsMar 19 2019Recently, intense efforts have been devoted to realizing classical analogues of various topological phases of matter. In this Letter, we explore the intriguing Weyl physics by a simple one-dimensional sonic crystal, in which two extra structural parameters ... More
A bandmixing treatment for multiband-coupled systems via nonlinear-eigenvalue scenarioMar 18 2019We present a numeric-computational procedure to deal with the intricate bandmixing phenomenology in the framework of the quadratic eigenvalue problem (QEP), which is derived from a physical system described by N-coupled components Sturm-Liouville matrix ... More
A quantum cellular automaton for one-dimensional QEDMar 17 2019We propose a discrete spacetime formulation of quantum electrodynamics in one-dimension (a.k.a the Schwinger model) in terms of quantum cellular automata, i.e. translationally invariant circuits of local quantum gates. These have exact gauge covariance ... More
A note on the parity anomaly from the Hamiltonian point of viewMar 15 2019We review the parity anomaly of the massless Dirac fermion in $2+1$ dimensions from the Hamiltonian, as opposed to the path integral, point of view. We have two main goals for this note. First, we hope to make the parity anomaly more accessible to condensed ... More
The Krein-Schrödinger Formalism of Bosonic BdG and Certain Classical Systems and Their Topological ClassificationMar 15 2019To understand recent works on classical and quantum spin equations and their topological classification, we develop a unified mathematical framework for bosonic BdG systems and associated classical wave equations; it applies not just to equations that ... More
One-dimensional scattering of fermions on $δ$-impuritiesMar 13 2019We study the spectrum of the 1D Dirac Hamiltonian encompassing the bound and scattering states of a fermion distorted by a static background built from $\delta$-function potentials. We distinguish between "mass-spike" and "electrostatic" $\delta$-potentials. ... More
One-dimensional scattering of fermions on $δ$-impuritiesMar 13 2019Mar 24 2019We study the spectrum of the 1D Dirac Hamiltonian encompassing the bound and scattering states of a fermion distorted by a static background built from $\delta$-function potentials. We distinguish between "mass-spike" and "electrostatic" $\delta$-potentials. ... More
Two-dimensional Wigner crystals of classical Lennard-Jones particlesMar 13 2019The ground-state of two-dimensional (2D) systems of classical particles interacting pairwisely by the generalized Lennard-Jones potential is studied. Taking the surface area per particle $A$ as a free parameter and restricting oneself to periodic Bravais ... More
Unconventional Scaling of the Superfluid Density with the Critical Temperature in Transition Metal DichalcogenidesMar 13 2019Mar 18 2019We report on muon spin rotation experiments probing the temperature-dependent magnetic penetration depth in 2H-NbSe_2 under high-pressure (p_max = 2.1 GPa) and in 4H-NbSe_2 at ambient pressure. The current results for ambient pressure along with our earlier ... More
Unconventional Scaling of the Superfluid Density with the Critical Temperature in Transition Metal DichalcogenidesMar 13 2019We report on muon spin rotation experiments probing the temperature-dependent magnetic penetration depth in 2H-NbSe_2 under high-pressure (p_max = 2.1 GPa) and in 4H-NbSe_2 at ambient pressure. The current results for ambient pressure along with our earlier ... More
Long-lived and transient supersolid behaviors in dipolar quantum gasesMar 11 2019By combining theory and experiments, we demonstrate that dipolar quantum gases of both $^{166}$Er and $^{164}$Dy support a state with supersolid properties, where a spontaneous density modulation and a global phase coherence coexist. This paradoxical ... More
Floquet Systems with Hall Effect: Topological Properties and Phase TransitionsMar 09 2019We study the quantum topological properties of Floquet (time-periodic) systems exhibiting Hall effects due to perpendicular magnetic and electric fields. The systems are charged particles periodically kicked by a one-dimensional cosine potential in the ... More
Two roads to antispacetime in polar distorted B phase: Kibble wall and half-quantum vortexMar 06 2019We consider the emergent tetrad gravity and the analog of antispacetime realized in the recent experiments ( J.T. Makinen, et al., Nat. Comm. 10, 237 (2019)) on the composite defects in superfluid $^3$He: the Kibble walls bounded by strings (the half ... More
Two roads to antispacetime in polar distorted B phase: Kibble wall and half-quantum vortexMar 06 2019Mar 22 2019We consider the emergent tetrad gravity and the analog of antispacetime realized in the recent experiments ( J.T. Makinen, et al., Nat. Comm. 10, 237 (2019)) on the composite defects in superfluid $^3$He: the Kibble walls bounded by strings (the half ... More
Two roads to antispacetime in polar distorted B phase: Kibble wall and half-quantum vortexMar 06 2019Mar 07 2019We consider the emergent tetrad gravity and the analog of antispacetime realized in the recent experiments ( J.T. Makinen, et al., Nat. Comm. 10, 237 (2019)) on the composite defects in superfluid $^3$He: the Kibble walls bounded by strings (the half ... More
Nano-NMR based flow meterMar 06 2019Microfludic channels are now a well established platform for many purposes, including bio-medical research and Lab on a Chip applications. However, the nature of flow within these channels is still unclear. There is evidence that the mean drift velocity ... More
Microwave excitations and magnetization dynamics of strip domain filmsMar 02 2019FeNi films with the stripe domain pattern are prepared by electrodeposition and sputtering methods. The composition, thickness, phase structure, magnetic domain, static magnetic parameters, and quality factor, as well as dynamic properties of the two ... More
Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2Mar 01 2019Bulk-surface correspondence in Weyl semimetals assures the formation of topological "Fermi-arc" surface bands whose existence is guaranteed by bulk Weyl nodes. By investigating three distinct surface terminations of the ferromagnetic semimetal Co3Sn2S2 ... More
Frequency dependent ab initio resonance Raman spectroscopyMar 01 2019We present a new method to compute resonance Raman spectra based on ab initio level calculations using the frequency dependent Placzek approximation. We illustrate the efficiency of our hybrid quantum-classical method by calculating the Raman spectra ... More
Frequency-dependent ab initio Resonance Raman SpectroscopyMar 01 2019Apr 08 2019We present a new method to compute resonance Raman spectra based on ab initio level calculations using the frequency-dependent Placzek approximation. We illustrate the efficiency of our hybrid quantum-classical method by calculating the Raman spectra ... More
Learning to measure resistance noise demystifies the ubiquitous 1/f excess noiseFeb 27 2019To study resistance noise (DeltaR) by a spectrum analyzer we must convert this noise into a noise voltage (DeltaV) at the reach of such generalized voltmeter. Whenever a current Iconv is set in a resistor to convert its resistance noise into noise voltage ... More
Variational quantum Monte Carlo with neural network ansatz for open quantum systemsFeb 25 2019The possibility to simulate the properties of many-body open quantum systems with a large number of degrees of freedom is the premise to the solution of several outstanding problems in quantum science and quantum information. The challenge posed by this ... More
Kohn-Sham theory with paramagnetic currents: compatibility and functional differentiabilityFeb 25 2019Recent work has established Moreau-Yosida regularization as a mathematical tool to achieve rigorous functional differentiability in density-functional theory. In this article, we extend this tool to paramagnetic current-density-functional theory, the ... More
New Frontiers in Multidimensional Self-Trapping of Nonlinear Fields and MatterFeb 23 2019We review the state of the art and recently obtained theoretical and experimental results for two- and three-dimensional (2D and 3D) solitons and related states, such as quantum droplets, in optical systems, atomic Bose-Einstein condensates (BECs), and ... More
Perspective: Nonequilibrium glassy dynamics in dense systems of active particlesFeb 22 2019Despite the diversity of materials designated as active matter, virtually all active systems undergo a form of dynamic arrest when crowding and activity compete, reminiscent of the dynamic arrest observed in colloidal and molecular fluids undergoing a ... More
Unusual broadening of wave packets on latticesFeb 21 2019The broadening of one-dimensional Gaussian wave packets is presented in all textbooks on quantum mechanics. It is used to elucidate Heisenberg's uncertainty relation. The behaviour on a lattice is drastically different if the amplitude and/or phase of ... More
Negative temperature in CPT-symmetic UniverseFeb 20 2019In Ref.1 (L. Boyle, K. Finn and N. Turok, CPT-Symmetric Universe, Phys. Rev. Lett. {\bf 121}, 251301 (2018)) the antispacetime Universe was suggested as the analytic continuation of our Universe across the Big Bang singularity. We extended this analytic ... More
Difficulties in operator-based formulation of the bulk quadrupole momentFeb 20 2019The electric multipole moments are the most fundamental properties of insulating materials. However, the general formulation of bulk multipoles has been a long standing problem. The solution for the electric dipole moment was provided decades ago by King-Smith, ... More
Non-Hermitian Boundary ModesFeb 19 2019Apr 18 2019We consider conditions for the existence of boundary modes in non-Hermitian systems with edges of arbitrary co-dimension. Through a universal formulation of formation criteria for boundary modes in terms of local Green functions, we outline a generic ... More