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View article: Floquet Non-Bloch Formalism for a Non-Hermitian Ladder: From Theoretical Framework to Topolectrical Circuits
Floquet Non-Bloch Formalism for a Non-Hermitian Ladder: From Theoretical Framework to Topolectrical Circuits Open
Periodically driven systems intertwined with non-Hermiticity opens a rich arena for topological phases that transcend conventional Hermitian limits. The physical significance of these phases hinges on obtaining the topological invariants t…
View article: Gap Anisotropy in Layered Superconductors Due to Rashba and Dresselhaus Spin-Orbit Interactions
Gap Anisotropy in Layered Superconductors Due to Rashba and Dresselhaus Spin-Orbit Interactions Open
The theory of layered superconductors is extended in the presence of Rashba and Dresselhaus spin-orbit interactions (SOIs). Using the intralayer BCS-like pairing interaction and employing the Gor'kov formalism, we obtain analytical express…
View article: Anomalous Lifetime of Quasiparticles in Fermi Liquids as a Precursor of the Density-Wave Instability
Anomalous Lifetime of Quasiparticles in Fermi Liquids as a Precursor of the Density-Wave Instability Open
We analytically study the inelastic lifetime of quasiparticles due to particle-particle interactions in a three-dimensional Fermi liquid approaching a density-wave instability. Using the G$_0$W approximation, we find that the softening of …
View article: Mutual dipolar drag in a bilayer Fermi gas
Mutual dipolar drag in a bilayer Fermi gas Open
We consider two-dimensional spin-polarized dipolar Fermi gases confined in a\ndouble-layer system and calculate the momentum transfer between the layers as a\nfunction of temperature to investigate the transport properties of the system.\n…
View article: Defining a critical temperature of a crossover from BEC to the normal phase
Defining a critical temperature of a crossover from BEC to the normal phase Open
We address the problem of identifying the critical temperature in a crossover from the Bose–Einstein condensed (BEC) phase to the normal phase. For this purpose we study the temperature dependence of magnetization of spin-gapped quantum ma…
View article: Defining a critical temperature of a crossover from BEC to the normal phase in anisotropic quantum magnets
Defining a critical temperature of a crossover from BEC to the normal phase in anisotropic quantum magnets Open
We address the problem of identifying the critical temperature in a crossover from the Bose-Einstein condensed (BEC) phase to the normal phase. For this purpose we study the temperature dependence of magnetization of spin-gapped quantum ma…
View article: Density and pseudo-spin rotons in a bilayer of soft-core bosons
Density and pseudo-spin rotons in a bilayer of soft-core bosons Open
We study the dynamics of a bilayer system of bosons with repulsive soft-core Rydberg-dressed interactions within the mean-field Bogoliubov-de Gennes approximation. We find roton minima in both symmetric and asymmetric collective density mo…
View article: Effects of exchange and weak Dzyaloshinsky–Moriya anisotropies on thermodynamic characteristics of spin-gapped magnets
Effects of exchange and weak Dzyaloshinsky–Moriya anisotropies on thermodynamic characteristics of spin-gapped magnets Open
We study the modification of low-temperature properties of quantum magnets such as magnetization, heat capacity, energy spectrum and densities of condensed and noncondensed quasiparticles (triplons) due to anisotropies in the framework of …
View article: Critical behavior of Tan’s contact for bosonic systems with a fixed chemical potential
Critical behavior of Tan’s contact for bosonic systems with a fixed chemical potential Open
The temperature dependence of Tan’s contact parameter C and its derivatives for spin gapped quantum magnets are investigated. We use the paradigm of Bose–Einstein condensation (BEC) to describe the low temperature properties of quasipartic…
View article: Metal-insulator transitions in bilayer electron-hole systems in transition metal dicalcogenides
Metal-insulator transitions in bilayer electron-hole systems in transition metal dicalcogenides Open
We investigated metal-insulator transitions for double layer two-dimensional electron hole systems in transition metal dicalcogenides (TMDC) stacked on opposite sides of thin layers of boron nitride (BN). The interparticle interaction is c…
View article: Rydberg-dressed Fermi liquid: Correlations and signatures of droplet crystallization
Rydberg-dressed Fermi liquid: Correlations and signatures of droplet crystallization Open
We investigate the effects of many-body correlations on the ground-state properties of a single-component ultracold Rydberg-dressed Fermi liquid with purely repulsive interparticle interactions in both three and two spatial dimensions. We …
View article: Reentrant Localization Transition in a Quasiperiodic Chain
Reentrant Localization Transition in a Quasiperiodic Chain Open
Systems with quasiperiodic disorder are known to exhibit a localization transition in low dimensions. After a critical strength of disorder, all the states of the system become localized, thereby ceasing the particle motion in the system. …
View article: Counterflow in Bose gas bilayers: Collective modes and dissipationless drag
Counterflow in Bose gas bilayers: Collective modes and dissipationless drag Open
We investigate the collective density oscillations and dissipationless drag effect in bilayer structures of ultra-cold bosons in the presence of counterflow. We consider different types of inter-particle interactions and obtain the drag co…
View article: Quantum turnstile regime of nanoelectromechanical systems
Quantum turnstile regime of nanoelectromechanical systems Open
The effects of a turnstile operation on the current-induced vibron dynamics in nanoelectromechanical systems (NEMS) are analyzed in the framework of the generalized master equation. In our simulations each turnstile cycle allows the pumpin…
View article: Many-body effects due to the electron–electron interaction in silicene under an applied exchange field: The case of valley–spin coupling
Many-body effects due to the electron–electron interaction in silicene under an applied exchange field: The case of valley–spin coupling Open
We investigate the many-body effects induced by the electron–electron interaction in a valley–spin-polarized silicene under a perpendicularly applied exchange field. We calculate the real and imaginary parts of the self-energy within the l…
View article: Rotons and Bose condensation in Rydberg-dressed Bose gases
Rotons and Bose condensation in Rydberg-dressed Bose gases Open
We investigate the ground-state properties and excitations of Rydberg-dressed bosons in both three and two dimensions, using the hypernetted-chain Euler-Lagrange approximation, which accounts for correlations and thus goes beyond the mean-…
View article: Superfluid weight and polarization amplitude in the one-dimensional bosonic Hubbard model
Superfluid weight and polarization amplitude in the one-dimensional bosonic Hubbard model Open
We calculate the superfluid weight and the polarization amplitude for the one-dimensional bosonic Hubbard model with focus on the strong-coupling regime via variational, exact diagonalization, and strong coupling calculations. Our variatio…
View article: Spin-gapped magnets with weak anisotropies II: Effects of exchange and Dzyaloshinsky-Moriya anisotropies on thermodynamic characteristics
Spin-gapped magnets with weak anisotropies II: Effects of exchange and Dzyaloshinsky-Moriya anisotropies on thermodynamic characteristics Open
We study the modification of physical observables due to anisotropies in the framework of our mean-field based approach proposed previously. We have shown that, in contrast to exchange anisotropy (EA) interaction, the Dzyaloshinsky-Moriya …
View article: Effects of exchange and weak Dzyaloshinsky-Moriya anisotropies on thermodynamic characteristics of spin-gapped magnets
Effects of exchange and weak Dzyaloshinsky-Moriya anisotropies on thermodynamic characteristics of spin-gapped magnets Open
We study the modification of low temperature properties of quantum magnets such as magnetization, heat capacity, energy spectrum, and densities of condensed and noncondensed quasiparticles (triplons) due to anisotropies in the framework of…
View article: Generalized Aubry-André-Harper model with modulated hopping and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>p</mml:mi></mml:math>-wave pairing
Generalized Aubry-André-Harper model with modulated hopping and -wave pairing Open
We study an extended Aubry-André-Harper model with simultaneous modulation of hopping on-site potential and p-wave superconducting pairing. For the case of commensurate modulation of β=1/2 it is shown that the model hosts four different ty…
View article: Composite quasiparticles in strongly correlated dipolar Fermi liquids
Composite quasiparticles in strongly correlated dipolar Fermi liquids Open
Strong particle-plasmon interaction in electronic systems can lead to composite hole-plasmon excitations. We investigate the emergence of similar composite quasiparticles in ultracold dipolar Fermi liquids originating from the long-range d…
View article: Plasmon-phonon coupling in a valley-spin-polarized two-dimensional electron system: A theoretical study on monolayer silicene
Plasmon-phonon coupling in a valley-spin-polarized two-dimensional electron system: A theoretical study on monolayer silicene Open
We study the hybrid excitations due to the coupling between surface optical phonons of a polar insulator substrate and plasmons in the valley-spin-polarized metal phase of silicene under an exchange field. We perform the calculations withi…
View article: Density-wave instability and collective modes in a bilayer system of antiparallel dipoles
Density-wave instability and collective modes in a bilayer system of antiparallel dipoles Open
We consider a bilayer of dipolar particles in which the polarization of dipoles is perpendicular to the
\nplanes, in the antiparallel configuration. Using accurate static structure factor S q( ) data from
\nhypernetted-chain (HNC) and Ferm…
View article: Phase diagram and dynamics of Rydberg-dressed fermions in two dimensions
Phase diagram and dynamics of Rydberg-dressed fermions in two dimensions Open
We investigate the ground-state properties and the collective modes of a\ntwo-dimensional two-component Rydberg-dressed Fermi liquid in the\ndipole-blockade regime. We find instability of the homogeneous system toward\nphase separated and …
View article: Variational Monte Carlo method for the Baeriswyl wave function: Application to the one-dimensional bosonic Hubbard model
Variational Monte Carlo method for the Baeriswyl wave function: Application to the one-dimensional bosonic Hubbard model Open
A variational Monte Carlo method for bosonic lattice models is introduced. The method is based on the Baeriswyl projected wave function. The Baeriswyl wave function consists of a kinetic energy based projection applied to the wave function…
View article: Light-hole exciton mixing and dynamics in Mn-doped quantum dots
Light-hole exciton mixing and dynamics in Mn-doped quantum dots Open
We investigate theoretically the spectral and dynamical effects of the short-range exchange interaction between a single manganese (Mn) atom hosted by cylindrical CdTe quantum dots and its light-hole excitons or biexcitons. Our approach is…
View article: Heat transfer through dipolar coupling: Sympathetic cooling without contact
Heat transfer through dipolar coupling: Sympathetic cooling without contact Open
We consider two parallel layers of dipolar ultracold Fermi gases at different temperatures and calculate the heat transfer between them. The effective interactions describing screening and correlation effects between the dipoles in a singl…