Article
Physics, Multidisciplinary
Ji-Guo Wang, Yu-Han Gan, Jin-Cui Zhao
Summary: This study investigates the quantum phase coherence and atomic distribution of two-component spin-orbit coupled bosons in a disordered double-well potential. Different behaviors of quantum phase coherence were observed under different intraspecies interactions, either showing single, double, or triple periodic oscillations. The resonance feature of quantum phase coherence becomes significant when intraspecies and interspecies interactions are comparable.
Article
Physics, Fluids & Plasmas
Jun-Cheng Liang, Yan-Chao Zhang, Chen Jiao, Ai-Xia Zhang, Ju-Kui Xue
Summary: We theoretically investigate the ground-state phases and superfluidity of tunable spin-orbit-coupled Bose-Einstein condensates under the periodic driving of Raman coupling. By adjusting the external driving, the boundary of ground-state phases can be controlled, leading to three different phase transitions. In the stripe phase, the contrast of the stripe density can be enhanced by the periodic driving. Additionally, dynamical instability and sound velocity of the ground-state and superfluidity state can be effectively controlled by tuning the periodic driving strength of Raman coupling.
Article
Materials Science, Multidisciplinary
Daisuke Iizasa, Asuka Aoki, Takahito Saito, Junsaku Nitta, Gian Salis, Makoto Kohda
Summary: This study investigates the spatiotemporal spin dynamics under spin-orbit interaction in a (001) GaAs two-dimensional electron gas using magneto-optical Kerr rotation microscopy. It was found that the induction of spin precession frequency nonlinearly depends on the diffusion velocity near the cancellation between spin-orbit field and external magnetic field, contrary to conventional expectations. This unexpected behavior is attributed to the enhancement of spin relaxation anisotropy by the electron velocity perpendicular to the diffused direction.
Article
Physics, Multidisciplinary
Kevin T. Geier, Giovanni I. Martone, Philipp Hauke, Wolfgang Ketterle, Sandro Stringari
Summary: In this study, the nonrigidity and dynamic behavior of density stripes in a spin-orbit-coupled Bose-Einstein condensate with supersolidity are explored. Both analytical and numerical analysis demonstrate that spin waves induce crystal wave-like oscillations in the density profile, affecting the periodicity and orientation of the fringes. These findings highlight the paradigmatic nature of this system as a supersolid with a fully dynamic crystalline structure.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Jie Wang, Jun-Cheng Liang, Zi-Fa Yu, An-Qing Zhang, Ai-Xia Zhang, Ju-Kui Xue
Summary: We study the ground state phases of quasi-one-dimensional spin-orbit coupled spin-1 Bose-Einstein condensates trapped in a harmonic potential. Based on variational analysis, we obtain the conditions for phase transition between magnetized and unmagnetized phases analytically for the first time, and reveal the physical mechanism of inducing phase transition. We discuss the competition relationship among spin-independent interaction, spin-dependent interaction, spin-orbit (SO) coupling, and the harmonic potential for generating phase transition systematically.
Article
Chemistry, Multidisciplinary
Michael Berger, Dominik Schulz, Jamal Berakdar
Summary: Quantum scars refer to enhanced localization of probability density of states in spectral regions with high energy levels. The study showed that spin-dependent scarring occurs in spin-coupled electronic systems, which can be detected through transport measurements or spin-polarized scanning tunneling spectroscopy.
Article
Physics, Multidisciplinary
Xuan Xu, Chao Gao, Ji Lin, Hui-jun Li
Summary: In this study, we investigate the effects of spin-orbit coupling, external potential, and rotation frequency/direction on the profile and stability of a striped state in a two-dimensional Bose-Einstein condensate. We find that the number of stripes in both spinor components increases with the strength of spin-orbit coupling, while the difference in striped numbers remains one. The addition of a rotation term changes the profiles of the spinor components qualitatively and alters the regulation of the striped numbers, but the difference in striped numbers remains one. Furthermore, the rotation direction only causes an exchange between the striped states of the two spinor components, and the rotation frequency leads to a transition from the striped state to a mixture of striped and vortex states.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Optics
Pardeep Kaur, Sandeep Gautam, S. K. Adhikari
Summary: We studied the emergence of supersolid-like crystalline structures in a quasi-two-dimensional spin-orbit coupled spin-2 condensate. Different strengths of spin-orbit coupling and interatomic interactions led to a variety of nontrivial density patterns in the solutions.
Article
Multidisciplinary Sciences
A. Valdes-Curiel, D. Trypogeorgos, Q. -Y. Liang, R. P. Anderson, I. B. Spielman
Summary: In this study, researchers explore the topology in spin-orbit coupled 87Rb atoms using time domain spectroscopy and quantum state tomography. They measure the full quantum state to extract the Berry phase of the system and demonstrate signatures of a half-integer Chern index.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Applied
Qiang Zhao
Summary: In this paper, the spin dynamics of spin-2 Bose-Einstein condensates with spin-orbit coupling and dipole-dipole interaction are studied. The results show that the periodic oscillation of spin dynamics is broken in the presence of dipole-dipole interaction, and the thermalization time decreases with increasing magnetization.
MODERN PHYSICS LETTERS B
(2022)
Article
Physics, Multidisciplinary
Juan-juan Qi, Dun Zhao, Wu-Ming Liu
Summary: We analytically investigate the effects of spin-orbit coupling (SOC) on soliton collisions in spin-1 Bose-Einstein condensates (BECs). By using the non-standard Hirota's bilinear method, we derive exact soliton solutions for a 1D spin-orbit coupled spin-1 BEC, revealing how SOC can manipulate the dynamics of solitons in spinor BECs. We discuss in detail the soliton collisions of different types under SOC, including ferromagnetic-polar, ferromagnetic-ferromagnetic, and polar-polar collisions. Comparisons between systems with and without SOC show a remarkable phenomenon: SOC can cause the splitting of a soliton.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Computer Science, Interdisciplinary Applications
Pardeep Kaur, Arko Roy, Sandeep Gautam
Summary: This article introduces a numerical scheme to study the static and dynamic properties of spin-1 Bose-Einstein condensates with spin-orbit coupling, providing codes and numerical results for comparison and analysis. Several conclusions about ferromagnetic and antiferromagnetic spin-1 BECs are drawn based on the results.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Kevin T. Geier, Giovanni Martone, Philipp Hauke, Sandro Stringari
Summary: This study proposes observable features for detecting supersolidity in harmonically trapped spin-orbit-coupled Bose-Einstein condensates, and provides signatures of Goldstone modes associated with supersolidity. The system behavior undergoes drastic changes at the critical Raman coupling, with distinctive axial breathing oscillations observed above the transition.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Yuanyuan Chen, Hao Lyu, Yong Xu, Yongping Zhang
Summary: This study investigates the elementary excitations of a spin-orbit-coupled spin-1 Bose-Einstein condensate in different phases, and finds that these excitations depend on the spin-orbit coupling parameters.
NEW JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hiroshi Hayasaka
Summary: This study investigates the quantum correction effect on electrical conductivity in a two-dimensional Wolff Hamiltonian, which models the spin-orbit coupling lattice system. The nonadiabatic transition processes in impurity scattering suppress the weak antilocalization effect, with a strong dependence on the spin relaxation length in the SOC lattice system. The spin relaxation length in Bi thin film is discussed in detail.
Article
Physics, Particles & Fields
Tigran A. Sedrakyan, Hrachya M. Babujian
Summary: In this study, a set of non-stationary quantum models are considered. It is shown that their dynamics can be studied by linking them to Knizhnik-Zamolodchikov (KZ) equations for correlation functions in conformal field theories. The boundary Wess-Zumino-Novikov-Witten model is specifically explored, where equations for correlators of primary fields are defined by an extension of KZ equations, revealing the connections to dynamical systems. As an example, an exact solution to a dynamical system that is a specific multi-level generalization of the two-level Landau-Zenner system, known as the Demkov-Osherov model, is provided to demonstrate the feasibility of the proposed method. The method can be used to study the nonequilibrium dynamics in various multi-level systems from the solution of the corresponding KZ equations.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Rui Wang, Tigran A. Sedrakyan, Baigeng Wang, Lingjie Du, Rui-Rui Du
Summary: Correlation and frustration are important in physics, leading to new quantum phases. In this study, we observe the moat-band phenomena in shallowly inverted InAs/GaSb quantum wells, where we find an unconventional time-reversal-symmetry breaking excitonic ground state. We demonstrate the evolution from helical-like to chiral-like edge transport and explain our experimental observations using a moat band for excitons that results from density imbalance.
Article
Materials Science, Multidisciplinary
Rui Wang, Z. Y. Xie, Baigeng Wang, Tigran Sedrakyan
Summary: Topological phase transitions involving intrinsic topological orders cannot be described by conventional mean-field theories, but lattice Chern-Simons theory shows that traditional concepts can still play a crucial role in certain cases, while simplifying the transitions to effective mean-field theories based on fermionic degrees of freedom.
Article
Materials Science, Multidisciplinary
Ke Wang, T. A. Sedrakyan
Summary: Perpendicular magnetic field introduces an anomalous interaction correction to the static conductivity of doped graphene, leading to a proportional relationship between magnetoresistance and inverse temperature. This behavior originates from field-induced breaking of symmetry.
Article
Materials Science, Multidisciplinary
Ke Wang, M. E. Raikh, T. A. Sedrakyan
Summary: The presence of a weak perpendicular magnetic field in graphene breaks the chiral symmetry of each valley in the electron spectrum, leading to anomalous dependencies in the electron-electron interaction lifetime and magnetic field corrections to the thermodynamic characteristics. Experiments are discussed to explore the effects predicted by this symmetry breaking.
Article
Materials Science, Multidisciplinary
Ke Wang, M. E. Raikh, T. A. Sedrakyan
Summary: The study shows that the opposite chiralities of Dirac electrons in graphene significantly modify the Friedel oscillations, with a weak uniform magnetic field having an anomalous effect on the oscillations. This field-dependent contribution in a large spatial interval does not decay with distance, originating from a spin-dependent magnetic phase accumulated by the electron propagator.
Article
Optics
Chenan Wei, Tigran A. Sedrakyan
Summary: The SYK model's tractability at the large N limit allows for theoretical study of its chaotic behavior and holographic duality properties. The proposed setup provides a platform to realize the SYK model and investigate its exotic behavior using released fermion velocity distribution and many-body Loschmidt echo scheme.
Article
Materials Science, Multidisciplinary
Tigran A. Sedrakyan, Konstantin B. Efetov
Article
Materials Science, Multidisciplinary
Tigran Sedrakyan, Roderich Moessner, Alex Kamenev
Article
Materials Science, Multidisciplinary
Ke Wang, T. A. Sedrakyan
Article
Materials Science, Multidisciplinary
Saurabh Maiti, Tigran A. Sedrakyan
Article
Materials Science, Multidisciplinary
Saurabh Maiti, Tigran Sedrakyan
Article
Materials Science, Multidisciplinary
Rui Wang, Baigeng Wang, Tigran A. Sedrakyan
Article
Materials Science, Multidisciplinary
Tigran A. Sedrakyan, Konstantin B. Efetov
Article
Materials Science, Multidisciplinary
Tigran A. Sedrakyan, Victor M. Galitski, Alex Kamenev
