total 136016took 0.11s

Zero-bias Anomaly of Tunneling into the Edge of a 2D Electron SystemJun 30 1995We investigate the electron tunneling into the edge of a clean weakly interacting two-dimensional electron gas. It is shown that the corresponding differential conductance $G(V)$ has a cusp at zero bias, and is characterized by a universal slope $|dG/dV|$ ... More

Kondo effect induced by a magnetic fieldFeb 26 2001Mar 29 2001We study peculiarities of transport through a Coulomb blockade system tuned to the vicinity of the spin transition in its ground state. Such transitions can be induced in practice by application of a magnetic field. Tunneling of electrons between the ... More

Mesoscopic fluctuations of tunneling through double quantum dotsOct 20 1998We study fluctuations of conductance of two connected in series dots in the Coulomb blockade regime. The pattern of the fluctuations turns out to be extremely sensitive to a magnetic field. These conductance fluctuations also provide information about ... More

Dynamics of a one-dimensional spinor Bose liquid: a phenomenological approachAug 04 2008May 29 2009The ground state of a spinor Bose liquid is ferromagnetic, while the softest excitation above the ground state is the magnon mode. The dispersion relation of the magnon in a one-dimensional liquid is periodic in the wavenumber q with the period 2\pi n, ... More

Statistics of Coulomb blockade peak spacings for a partially open dotNov 16 1999We show that randomness of the electron wave functions in a quantum dot contributes to the fluctuations of the positions of the conductance peaks. This contribution grows with the conductance of the junctions connecting the dot to the leads. It becomes ... More

Kondo effect in real quantum dotsMay 08 2001Oct 23 2001Exchange interaction within a quantum dot strongly affects the transport through it in the Kondo regime. In a striking difference with the results of the conventional model, where this interaction is neglected, here the temperature and magnetic field ... More

Electron energy relaxation in the presence of magnetic impuritiesOct 24 2000Feb 27 2001We study inelastic electron-electron scattering mediated by the exchange interaction of electrons with magnetic impurities, and find the kernel of the corresponding two-particle collision integral. In a wide region of parameters, the kernel K is proportional ... More

Kondo effect in quantum dotsJan 26 2004Mar 26 2004We review mechanisms of low-temperature electronic transport through a quantum dot weakly coupled to two conducting leads. Transport in this case is dominated by electron-electron interaction. At temperatures moderately lower than the charging energy ... More

Conduction through a quantum dot near a singlet-triplet transitionMay 24 2000Sep 07 2000Kondo effect in the vicinity of a singlet-triplet transition in a vertical quantum dot is considered. This system is shown to map onto a special version of the two-impurity Kondo model. At any value of the control parameter, the system has a Fermi-liquid ... More

Low-temperature transport through a quantum dotJan 02 2005Oct 10 2005Contents: (1) Model of a lateral quantum dot system (2) Thermally-activated conduction: onset of the Coulomb blockade oscillations and Coulomb blockade peaks at low temperature (3) Activationless transport through a blockaded quantum dot: inelastic and ... More

Coulomb blockade and Kondo effect in quantum dotsFeb 08 2003Feb 20 2003We review the mechanisms of low-temperature electron transport across a quantum dot weakly coupled to two conducting leads. Conduction in this case is controlled by the interaction between electrons. At temperatures moderately lower than the single-electron ... More

Mesoscopic Fluctuations of Elastic CotunnelingMay 06 1996We study mesoscopic fluctuations of the conductance through a quantum dot at the wings of the Coulomb blokade peaks. At low temperatures, the main mechanism of conduction is the elastic cotunneling. The conductance strongly fluctuates with an applied ... More

Quantum Coulomb Blockade in Chaotic SystemsDec 14 1996We study the Coulomb blockade in a chaotic cavity connected to a lead by a perfectly transmitting quantum channel. In contrast to the previous theories, we show that the quantum fluctuations of charge, resulting from the perfect transmission, do not destroy ... More

Novel Edge Excitations of Two-dimensional Electron Liquid in a Magnetic FieldDec 16 1993We investigate the low-energy spectrum of excitations of a compressible electron liquid in a strong magnetic field. These excitations are localized at the periphery of the system. The analysis of a realistic model of a smooth edge yields new branches ... More

Mesoscopic charge quantizationOct 19 1997We study the Coulomb blockade in a chaotic quantum dot connected to a lead by a single channel at nearly perfect transmission. We take into account quantum fluctuations of the dot charge and a finite level spacing for electron states within the dot. Mesoscopic ... More

Two - Dimensional Electron Liquid in a Weak Magnetic FieldMay 08 1995We present an effective theory describing the low-energy properties of an interacting 2D electron gas at large non-integer filling factors $\nu\gg 1$. Assuming that the interaction is sufficiently weak, $r_s < 1$, we integrate out all the fast degrees ... More

New quantum phases in a one-dimensional Josephson arrayMay 16 1997We examine the phase diagram of an ordered one-dimensional Josephson array of small grains. The average grain charge in such a system can be tuned by means of gate voltage. At small grain-to-grain conductance, this system is strongly correlated because ... More

Generating dark solitons by single photonsOct 15 2007We show that dark solitons in 1D bose systems may be excited by resonant absorption of single quanta of an external ac field. The energy of the quantum $\hbar\omega$ should be slightly blue-detuned from the energy of a soliton with momentum $\hbar q$, ... More

Nonlinear magnetoconductance of a classical ballistic systemAug 28 2006We study nonlinear transport through a classical ballistic system accounting for the Coulomb interaction between electrons. The joint effect of the applied bias $V$ and magnetic field $H$ on the electron trajectories results in a component of the non-linear ... More

Transport spectroscopy of Kondo quantum dots coupled by RKKY interactionApr 15 2004May 30 2005We develop the theory of conductance of a quantum dot which carries a spin and is coupled via RKKY interaction to another spin-carrying quantum dot. The found dependence of the differential conductance on bias and magnetic field at fixed RKKY interaction ... More

Photo-Solitonic EffectJul 15 2008We show that dark solitons in 1D Bose liquids may be created by absorption of a single quanta of an external ac field, in a close analogy with the Einstein's photoelectric effect. Similarly to the von Lenard's experiment with photoexcited electrons, the ... More

Conductance of Mesoscopic Systems with Magnetic ImpuritiesOct 22 2002We investigate the combined effects of magnetic impurities and applied magnetic field on the interference contribution to the conductance of disordered metals. We show that in a metal with weak spin-orbit interaction, the polarization of impurity spins ... More

Resonant tunneling of interacting electrons in a one-dimensional wireSep 04 2002Feb 10 2003We consider the conductance of a one-dimensional wire interrupted by a double-barrier structure allowing for a resonant level. Using the electron-electron interaction strength as a small parameter, we are able to build a non-perturbative analytical theory ... More

Negative hopping magnetoresistance of two-dimensional electron gas in a smooth random potentialMay 04 1995We show that the tunnel coupling between semiclassical states localized in different minima of a smooth random potential increases when magnetic field is applied. This increase originates from the difference in gauge factors which electron wave functions ... More

Kinetics of quasiparticle trapping in a Cooper-pair boxNov 28 2006May 22 2007We study the kinetics of the quasiparticle capture and emission process in a small superconducting island (Cooper-pair box) connected by a tunnel junction to a massive superconducting lead. At low temperatures, the charge on the box fluctuates between ... More

Singlet-triplet transition in a lateral quantum dotApr 30 2003Aug 28 2003We study transport through a lateral quantum dot in the vicinity of the singlet-triplet transition in its ground state. This transition, being sharp in an isolated dot, is broadened to a crossover by the exchange interaction of the dot electrons with ... More

Energy relaxation of superconducting charge qubit via Andreev processesJun 04 2007Aug 21 2007We study fundamental limitations on the energy relaxation rate of a superconducting charge qubit with a large-gap Cooper-pair box, $\Delta_b > \Delta_r$. At a sufficiently large mismatch between the gap energies in the box $\Delta_b$ and in the reservoir ... More

Current fluctuations in a spin filter with paramagnetic impuritiesOct 30 2005Mar 25 2006We analyze the frequency dependence of shot noise in a spin filter consisting of a normal grain and ferromagnetic electrodes separated by tunnel barriers. The source of frequency-dependent noise is random spin-flip electron scattering that results from ... More

Quantum Fluctuations in the Equilibrium State of a Thin Superconducting LoopNov 12 1996We study the oscillatory flux dependence of the supercurrent in a thin superconducting loop, closed by a Josephson junction. Quantum fluctuations of the order parameter in the loop affect the shape and renormalize the amplitude of the supercurrent oscillations. ... More

Strong tunneling and charge quantization in S-I-N Coulomb blockade structuresJun 06 1998We study the charge of a small normal island connected by a tunnel junction to a superconducting lead. Unlike the N-I-N case, the steps of the Coulomb staircase remain sharp even if the conductance of the tunneling barrier exceeds e^2/h. One can observe ... More

Non-linear Resistivity of a Two-Dimensional Electron Gas in a Magnetic FieldNov 06 2006We develop a theory of nonlinear response to an electric field of a two-dimensional electron gas (2DEG) placed in a classically strong magnetic field. The latter leads to a non-linear current-voltage characteristic at a relatively weak electric field. ... More

Interaction-induced oscillations of the tunneling density of states in a non-quantizing magnetic fieldNov 15 1996We study tunneling into interacting disordered two-dimensional electron gas in a non-quantizing magnetic field, which does not cause the standard de Haas-- van Alphen oscillations. Interaction induces a new type of oscillations in the tunneling density ... More

Density of states of a two-dimensional electron gas in a non-quantizing magnetic fieldMay 17 1998We study local density of electron states of a two-dimentional conductor with a smooth disorder potential in a non-quantizing magnetic field, which does not cause the standart de Haas-van Alphen oscillations. It is found, that despite the influence of ... More

Theory of Andreev reflection in a junction with a strongly disordered semiconductorJan 23 1996We study the conduction of a {\sl N~-~Sm~-~S} junction, where {\sl Sm} is a strongly disordered semiconductor. The differential conductance $dI/dV$ of this {\sl N~-~Sm~-~S} structure is predicted to have a sharp peak at $V=0$. Unlike the case of a weakly ... More

Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic FieldAug 10 1994We study the spectral density function of a two-dimensional electron liquid in a weak magnetic field, the filling factor $\nu\gg 1$. A hydrodynamic model for low-energy excitations of the liquid is developed. It is found that even at $\nu\gg 1$ the density ... More

Quantum Effects in Coulomb BlockadeMar 01 2001Oct 24 2001We review the quantum interference effects in a system of interacting electrons confined to a quantum dot. The review starts with a description of an isolated quantum dot. We discuss the status of the Random Matrix theory (RMT) of the one-electron states ... More

Mesoscopic charge fluctuations in the Coulomb blockade regimeFeb 14 1998We study mesoscopic fluctuations of the differential capacitance of a dot connected to a lead by a single-mode quantum channel with adjustable conductance G. We show that the amplitude of the fluctuations reaches maximum at a partially opened channel, ... More

Tunneling ``zero-bias'' anomaly in the quasi-ballistic regimeMar 17 1996For the first time, we study the tunneling density of states (DOS) of the interacting electron gas beyond the diffusive limit. A strong correction to the DOS persists even at electron energies exceeding the inverse transport relaxation time, which could ... More

The g-factors of discrete levels in nanoparticlesJan 29 2000Spin-orbit scattering suppresses Zeeman splitting of individual energy levels in small metal particles. This suppression becomes significant when the spin-orbit scattering rate \tau_{so}^{-1} is comparable with the quantum level spacing \delta. The g-factor ... More

Electron transport and energy relaxation in dilute magnetic alloysMay 11 2003We consider the effect of the RKKY interaction between magnetic impurities on the electron relaxation rates in a normal metal. The interplay between the RKKY interaction and the Kondo effect may result in a non-monotonic temperature dependence of the ... More

Quantum phase transition in a two-channel-Kondo quantum dot deviceSep 29 2003Mar 18 2004We develop a theory of electron transport in a double quantum dot device recently proposed for the observation of the two-channel Kondo effect. Our theory provides a strategy for tuning the device to the non-Fermi-liquid fixed point, which is a quantum ... More

Two-electron state in a disordered 2D island: pairing caused by the Coulomb repulsionDec 18 1995We show the existence of bound two-electron states in an almost depleted two-dimensional island. These two-electron states are carried by special compact configurations of four single-electron levels. The existence of these states does not require phonon ... More

Spin-charge separation and Kondo effect in an open quantum dotMar 11 1999We study a quantum dot connected to the bulk by single-mode junctions at almost perfect conductance. Although the average charge $e\langle N \rangle$ of the dot is not discrete, its spin remains quantized: $s=1/2$ or $s=0$, depending (periodically) on ... More

Kinetics of the superconducting charge qubit in the presence of a quasiparticleMar 24 2006Aug 19 2006We investigate the energy and phase relaxation of a superconducting qubit caused by a single quasiparticle. In our model, the qubit is an isolated system consisting of a small island (Cooper-pair box) and a larger superconductor (reservoir) connected ... More

Persistent current in superconducting nanoringsJul 11 2002The superconductivity in very thin rings is suppressed by quantum phase slips. As a result the amplitude of the persistent current oscillations with flux becomes exponentially small, and their shape changes from sawtooth to a sinusoidal one. We reduce ... More

Fermi Edge Singularities and Backscattering in a Weakly Interacting 1D Electron GasNov 09 1993The photon-absorption edge in a weakly interacting one-dimensional electron gas is studied, treating backscattering of conduction electrons from the core hole exactly. Close to threshold, there is a power-law singularity in the absorption, $I(\epsilon) ... More

Tunneling of correlated electrons in ultra high magnetic fieldMar 02 2002Effects of the electron-electron interaction on tunneling into a metal in ultra-high magnetic field (ultra-quantum limit) are studied. The range of the interaction is found to have a decisive effect both on the nature of the field-induced instability ... More

Fermi-Luttinger liquid: Spectral function of interacting one-dimensional fermionsFeb 21 2007Sep 28 2007We evaluate the spectral function of interacting fermions in one dimension. Contrary to the Tomonaga-Luttinger model, our treatment accounts for the nonlinearity of the free fermion spectrum. In a striking departure from the Luttinger liquid theory, the ... More

Plasmon attenuation and optical conductivity of a two-dimensional electron gasDec 29 2003Apr 23 2004In a ballistic two-dimensional electron gas, the Landau damping does not lead to plasmon attenuation in a broad interval of wave vectors q << k_F. Similarly, it does not contribute to the optical conductivity \sigma (\omega, q) in a wide domain of its ... More

Dynamics of excitations in a one-dimensional Bose liquidMay 14 2007Sep 14 2007We show that the dynamic structure factor of a one-dimensional Bose liquid has a power-law singularity defining the main mode of collective excitations. Using the Lieb-Liniger model, we evaluate the corresponding exponent as a function of the wave vector ... More

Dynamic response of one-dimensional interacting fermionsMar 17 2006May 17 2006We evaluate the dynamic structure factor $S(q,\omega)$ of interacting one-dimensional spinless fermions with a nonlinear dispersion relation. The combined effect of the nonlinear dispersion and of the interactions leads to new universal features of $S(q,\omega)$. ... More

Linear conductance in Coulomb-blockade quantum dots in the presence of interactions and spinDec 03 2002We discuss the calculation of the linear conductance through a Coulomb-blockade quantum dot in the presence of interactions beyond the charging energy. In the limit where the temperature is large compared with a typical tunneling width, we use a rate-equations ... More

Aharonov-Bohm effect as a probe of interaction between magnetic impuritiesJun 30 2004We study the effects of the RKKY interaction between magnetic impurities on the mesoscopic conductance fluctuations of a metal ring with dilute magnetic impurities. At sufficiently low temperatures and strong magnetic fields, the loss of electron coherence ... More

Effect of Quasiparticles Injection on the AC Response of a SuperconductorJul 08 2010We calculate the AC linear response of a superconductor in a nonequilibrium electronic state. The nonequilibrium state is produced by injecting quasiparticles into the superconductor from normal leads through asymmetric tunnel contacts. The dissipative ... More

Universality of the Kondo Effect in a Quantum Dot out of EquilibriumMar 22 2000We study the Kondo effect in a quantum dot driven out of equilibrium by an external ac field. The Kondo effect can be probed by measuring the dc current induced by an auxiliary dc bias $V_{dc}$ applied across the dot. In the absence of ac perturbation, ... More

Asymmetric Zero-Bias Anomaly for Strongly Interacting Electrons in One DimensionMay 11 2006We study a system of one-dimensional electrons in the regime of strong repulsive interactions, where the spin exchange coupling J is small compared with the Fermi energy, and the conventional Tomonaga-Luttinger theory does not apply. We show that the ... More

Andreev Spectroscopy of Josephson CouplingNov 17 1994It is shown that the low energy spectrum of mesoscopic superconductors coupled by Josephson interaction can be probed by two-electron tunneling from a normal electrode. The Andreev reflection in the NS junction of a normal-superconductor-superconductor ... More

Surface impedance of superconductors with weak magnetic impuritiesOct 06 2011Dec 29 2011Magnetic impurities affect the spectrum of excitations of a superconductor and thus influence its impedance. We concentrate on the dissipative part of the surface impedance. We investigate its dependence on frequency, the density and strength of magnetic ... More

Critical conductance of a one-dimensional doped Mott insulatorAug 03 2007Jan 23 2008We consider the two-terminal conductance of a one-dimensional Mott insulator undergoing the commensurate-incommensurate quantum phase transition to a conducting state. We treat the leads as Luttinger liquids. At a specific value of compressibility of ... More

TUNNELING SPECTROSCOPY OF QUANTUM CHARGE FLUCTUATIONS IN THE COULOMB BLOCKADEApr 25 1995We present a theory of Coulomb blockade oscillations in tunneling through a pair of quantum dots connected by a tunable tunneling junction. The positions and amplitudes of peaks in the linear conductance are directly related, respectively, to the ground ... More

Suppression of Kondo effect in a quantum dot by external irradiationMar 30 1999We demonstrate that the external irradiation brings decoherence in the spin states of the quantum dot. This effect cuts off the Kondo anomaly in conductance even at zero temperature. We evaluate the dependence of the DC conductance in the Kondo regime ... More

Spin-charge separation in one-dimensional fermion systems beyond the Luttinger liquid theorySep 23 2010Dec 14 2010We develop a nonperturbative zero-temperature theory for the dynamic response functions of interacting one-dimensional spin-1/2 fermions. In contrast to the conventional Luttinger liquid theory, we take into account the nonlinearity of the fermion dispersion ... More

Theory of preparation and relaxation of a p-orbital atomic Mott insulatorJan 23 2009May 07 2009We develop a theoretical framework to understand the preparation and relaxation of a metastable Mott insulator state within the first excited band of a 1D optical lattice. The state is loaded by "lifting" atoms from the ground to the first excited band ... More

Frequency-dependent admittance of a short superconducting weak linkMar 12 2013We consider the linear and non-linear electromagnetic responses of a nanowire connecting two bulk superconductors. Andreev states appearing at a finite phase bias substantially affect the finite-frequency admittance of such a wire junction. Electron transitions ... More

Bosonization of strongly interacting electronsAug 01 2007Strong repulsive interactions in a one-dimensional electron system suppress the exchange coupling J of electron spins to a value much smaller than the Fermi energy E_F. The conventional theoretical description of such systems based on the bosonization ... More

Conductance of a proximitized nanowire in the Coulomb blockade regimeMar 27 2016Jun 27 2016We identify the leading processes of electron transport across finite-length segments of proximitized nanowires and build a quantitative theory of their two-terminal conductance. In the presence of spin-orbit interaction, a nanowire can be tuned across ... More

Weak Localization in Metallic Granular MediaApr 12 2005Jan 30 2006We investigate the interference correction to the conductivity of a medium consisting of metallic grains connected by tunnel junctions. Tunneling conductance between the grains, $e^2g_{\rm T}/\pi\hbar$, is assumed to be large, $g_{\rm T}\gg 1$. We demonstrate ... More

Quantum criticality in a Mott pn-junction in an armchair carbon nanotubeFeb 27 2011In an armchair carbon nanotube pn junction the p- and n- regions are separated by a region of a Mott insulator, which can backscatter electrons only in pairs. We predict a quantum-critical behavior in such a pn junction. Depending on the junction's built-in ... More

Zeeman splitting of zero-bias anomaly in Luttinger liquidsNov 15 2002Tunnelling density of states (DoS) in Luttinger liquid has a dip at zero energy, commonly known as the zero-bias anomaly (ZBA). In the presence of a magnetic field, in addition to the zero-bias anomaly, the DoS develops two peaks separated from the origin ... More

Interactions and Interference in Quantum Dots: Kinks in Coulomb Blockade Peak PositionsJul 09 1999Jul 19 1999We investigate the spin of the ground state of a geometrically confined many-electron system. For atoms, shell structure simplifies this problem-- the spin is prescribed by the well-known Hund's rule. In contrast, quantum dots provide a controllable setting ... More

Tunneling in One-Dimensional non-Luttinger Electron LiquidJun 18 1993The conductance of a weakly interacting electron gas in the presense of a single scatterer is found at arbitrary strength of the scattering potential. At weak interaction, a simple renormalization group approach can be used instead of the standard bosonization ... More

One-Dimensional Quantum Liquids: Beyond the Luttinger Liquid ParadigmOct 06 2011Sep 17 2012For many years, the Luttinger liquid theory has served as a useful paradigm for the description of one-dimensional (1D) quantum fluids in the limit of low energies. This theory is based on a linearization of the dispersion relation of the particles constituting ... More

The fate of 1D spin-charge separation away from Fermi pointsDec 02 2009Mar 27 2010We consider the dynamic response functions of interacting one dimensional spin-1/2 fermions at arbitrary momenta. We build a non-perturbative zero-temperature theory of the threshold singularities using mobile impurity Hamiltonians. The interaction induced ... More

Charging effects in the inductively shunted Josephson junctionFeb 17 2009Oct 20 2009The choice of impedance used to shunt a Josephson junction determines if the charge transferred through the circuit is quantized: a capacitive shunt renders the charge discrete, whereas an inductive shunt leads to continuous charge. This discrepancy leads ... More

Zero-bias anomaly in disordered wiresJun 21 2001Nov 17 2001We calculate the low-energy tunneling density of states $\nu(\epsilon, T)$ of an $N$-channel disordered wire, taking into account the electron-electron interaction non-perturbatively. The finite scattering rate $1/\tau$ results in a crossover from the ... More

Electron energy and phase relaxation on magnetic impuritiesNov 19 2002We discuss the effect of magnetic impurities on the inelastic scattering and dephasing of electrons. Magnetic impurities mediate the energy exchange between electrons. This mechanism is especially effective at small energy transfers $E$ in the absence ... More

Coulomb Blockade of Tunneling Through a Double Quantum DotDec 11 1995We study the Coulomb blockade of tunneling through a double quantum dot. The temperature dependence of the linear conductance is strongly affected by the inter-dot tunneling. As the tunneling grows, a crossover from temperature-independent peak conductance ... More

Theory of hopping magnetoresistance induced by Zeeman splittingJan 08 1995We present a study of hopping conductivity for a system of sites which can be occupied by more than one electron. At a moderate on-site Coulomb repulsion, the coexistence of sites with occupation numbers 0, 1, and 2 results in an exponential dependence ... More

Electronic Aharonov-Bohm Effect Induced by Quantum VibrationsJun 16 2006Mechanical displacements of a nanoelectromechanical system (NEMS) shift the electron trajectories and hence perturb phase coherent charge transport through the device. We show theoretically that in the presence of a magnetic feld such quantum-coherent ... More

Effect of disorder on a graphene p-n junctionOct 11 2007Jan 28 2008We propose the theory of transport in a gate-tunable graphene p-n junction, in which the gradient of the carrier density is controlled by the gate voltage. Depending on this gradient and on the density of charged impurities, the junction resistance is ... More

Exact exponents of edge singularities in dynamic correlation functions of 1D Bose gasNov 16 2007Sep 04 2008The spectral function and dynamic structure factor of bosons interacting by contact repulsion and confined to one dimension exhibit power-law singularities along the dispersion curves of the collective modes. We find the corresponding exponents exactly, ... More

Deterministic phase slips in mesoscopic superconducting ringsJan 11 2016Oct 30 2016The properties of one-dimensional superconductors are strongly influenced by topological fluctuations of the order parameter, known as phase slips, which cause the decay of persistent current in superconducting rings and the appearance of resistance in ... More

Energy-resolved inelastic electron scattering off a magnetic impurityJul 19 2005Feb 09 2006We study inelastic scattering of energetic electrons off a Kondo impurity. If the energy E of the incoming electron (measured from the Fermi level) exceeds significantly the Kondo temperature T_K, then the differential inelastic cross-section \sigma (E,w), ... More

Measurement of the winding number instability in mesoscopic superconducting ringsJan 11 2016We present measurements of the equilibrium current in superconducting mesoscopic rings threaded by a magnetic flux. As the flux is varied, the smooth evolution of the rings' current is interrupted by abrupt transitions. These transitions correspond to ... More

Phase transition in a chain of quantum vorticesSep 07 1998We consider interacting vortices in a quasi-one-dimensional array of Josephson junctions with small capacitance. If the charging energy of a junction is of the order of the Josephson energy, the fluctuations of the superconducting order parameter in the ... More

Magnetic-field-induced Luttinger liquidJun 26 2000Jul 05 2000It is shown that a strong magnetic field applied to a bulk metal induces a Luttinger-liquid phase. This phase is characterized by the zero-bias anomaly in tunneling: the tunneling conductance scales as a power-law of voltage or temperature. The tunneling ... More

Interacting fermions in two dimensions: beyond the perturbation theoryJan 03 2005We consider a system of 2D fermions with short-range interaction. A straightforward perturbation theory is shown to be ill-defined even for an infinitesimally weak interaction, as the perturbative series for the self-energy diverges near the mass shell. ... More

Singular perturbation theory for interacting fermions in two dimensionsDec 10 2004We consider a system of interacting fermions in two dimensions beyond the second-order perturbation theory in the interaction. It is shown that the mass-shell singularities in the self-energy, arising already at the second order of the perturbation theory, ... More

Tunable Kondo screening in a quantum dot deviceSep 26 2005Sep 27 2005We consider electron transport along a single-mode channel which is in contact, via tunnel junctions in its walls, with two quantum dots. Electron tunneling to and from the dots contributes to the electron backscattering, and thus modifies the channel ... More

Signatures of spin-charge separation in scanning probe microscopyJul 01 2004Nov 04 2004We analyze the effect of an auxiliary scatterer, such as the potential of a scanning tip, on the conductance of an interacting one-dimensional electron system. We find that the differential conductance for tunneling into the end of a semi-infinite quantum ... More

Microwave spectroscopy of a weakly-pinned charge density wave in a superinductorJan 06 2019A chain of small Josephson junctions (aka superinductor) emerged recently as a high-inductance, low-loss element of superconducting quantum devices. We notice that the intrinsic parameters of a typical superinductor in fact place it into the Bose glass ... More

Phenomenology of One-Dimensional Quantum Liquids Beyond the Low-Energy LimitDec 04 2008Mar 27 2009We consider zero temperature behavior of dynamic response functions of 1D systems near edges of support in momentum-energy plane $(k, \omega).$ The description of the singularities of dynamic response functions near an edge $\epsilon(k)$ is given by the ... More

Magnetic field-induced Kondo effects in Coulomb blockade systemsOct 22 2000We review the peculiarities of transport through a quantum dot caused by the spin transition in its ground state. Such transitions can be induced by a magnetic field. Tunneling of electrons between the dot and leads mixes the states belonging to the ground ... More

Gapped Phases of Quantum WiresNov 18 1999We investigate possible nontrivial phases of a two-subband quantum wire. It is found that inter- and intra-subband interactions may drive the electron system of the wire into a gapped state. If the nominal electron densities in the two subbands are sufficiently ... More

Universal theory of nonlinear Luttinger liquidsJun 29 2008Jan 09 2009One-dimensional quantum fluids are conventionally described by using an effective hydrodynamic approach known as Luttinger liquid theory. As the principal simplification, a generic spectrum of the constituent particles is replaced by a linear one, which ... More

Quasiparticle relaxation of superconducting qubits in the presence of fluxJan 07 2011Jan 21 2011Quasiparticle tunneling across a Josephson junction sets a limit for the lifetime of a superconducting qubit state. We develop a general theory of the corresponding decay rate in a qubit controlled by a magnetic flux. The flux affects quasiparticles tunneling ... More

Quantum Charge Fluctuations in a Superconducting GrainFeb 28 2005We consider charge quantization in a small superconducting grain that is contacted by a normal-metal electrode and is controlled by a capacitively coupled gate. At zero temperature and zero conductance $G$ between the grain and the electrode, the charge ... More

Thermodynamics of a Fermi liquid beyond the low-energy limitFeb 23 2005We consider the non-analytic temperature dependences of the specific heat coefficient, C(T)/T, and spin susceptibility, \chi_{s} (T), of 2D interacting fermions beyond the weak-coupling limit. We demonstrate within the Luttinger-Ward formalism that the ... More

Inelastic electron backscattering in a generic helical edge channelDec 31 2011May 04 2012We evaluate the low-temperature conductance of a weakly interacting one-dimensional helical liquid without axial spin symmetry. The lack of that symmetry allows for inelastic backscattering of a single electron, accompanied by forward-scattering of another. ... More

Decay of a plasmon into neutral modes in a carbon nanotubeJun 10 2010We evaluate the rate of energy loss of a plasmon in a disorder-free carbon nanotube. The plasmon decays into neutral bosonic excitations of the electron liquid. The process is mediated either by phonon-assisted backscattering of a single electron, or ... More