Article
Physics, Multidisciplinary
Jun Hui See Toh, Katherine C. McCormick, Xinxin Tang, Ying Su, Xi-Wang Luo, Chuanwei Zhang, Subhadeep Gupta
Summary: In this study, the evolution of dynamically localized states in an interacting one-dimensional ultracold gas periodically kicked by a pulsed optical lattice was experimentally studied. The interaction was found to lead to the emergence of dynamical delocalization and many-body quantum chaos.
Article
Optics
Ovidiu Patu
Summary: The study demonstrates that the momentum distribution of a gas released from a trap asymptotically approaches that of a noninteracting Fermi gas in the initial trap, a phenomenon known as dynamical fermionization. This behavior has been experimentally confirmed in certain cases. Additionally, removal of axial confinement in a strongly interacting Bose-Fermi mixture also leads to dynamical fermionization, with the momentum distribution of each component resembling its density profile at the initial time. The dynamics of both fermionic and bosonic momentum distributions exhibit characteristics similar to single component bosons under a sudden change in trap frequency.
Article
Optics
Liang Mao, Yajiang Hao, Lei Pan
Summary: In this paper, the non-Hermitian skin effect (NHSE) is extended from noninteracting systems to interacting many-body systems by studying an exactly solvable non-Hermitian model, the Lieb-Liniger Bose gas with imaginary vector potential. The NHSE is characterized quantitatively through solving the Bethe ansatz equations and calculating the model's density profiles and momentum distributions. It is found that the NHSE is enhanced for bound-state solutions on the attractive side, while it shows a nonmonotonic behavior for the scattering state. This work provides an example of NHSE in exactly solvable many-body systems and suggests its extension to other non-Hermitian many-body systems, particularly integrable models.
Article
Mathematics, Applied
Argha Debnath, Ayan Khan, Boris Malomed
Summary: This study investigates the static and dynamical properties of one-dimensional quantum droplets under the influence of local potentials in the form of narrow wells and barriers. The dynamics of the droplets are described by the one-dimensional Gross-Pitaevskii equation, including meanfield and beyond-mean-field terms. Stable solutions for localized states pinned to the well are found, and approximations for the well and the collision of the droplet with the barrier are developed. Simulations analyze the collisions of droplets with the wells and barriers, identifying outcomes such as fission and rebound effects.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Optics
Yabo Li, Dominik Schneble, Tzu-Chieh Wei
Summary: We investigate dynamically coupled one-dimensional Bose-Hubbard models and solve for the wave functions and energies of two-particle eigenstates. Our study reveals the existence of four different continua and three doublon dispersions in the two-particle spectrum of a system with generic interactions. The presence of doublons and their energies depend on the coupling strength between two species of bosons and the interaction strengths. We provide details on the spectrum and properties of two-particle states, and analyze the difference in time evolution under different coupling strengths and the relation between the long-time behavior of the system and the doublon dispersion. These dynamics can be observed in cold atoms and potentially simulated by digital quantum computers.
Article
Optics
Maciej Lebek, Andrzej Syrwid, Piotr T. Grochowski, Kazimierz Rzazewski
Summary: We analyze the dynamics of one-dimensional quantum gases with strongly attractive contact interactions and find that attractive forces can effectively act as strongly repulsive ones. Our findings extend the theoretical results on the super-Tonks-Girardeau gas and have implications for the domain stability in a two-component Fermi gas. We also discuss the effects of finite-range interactions and analyze the universality of the presented results. Moreover, our conclusions support the existence of metastable quantum droplets in the regime of strongly attractive contact and attractive dipolar interactions.
Article
Physics, Multidisciplinary
Martin Bonkhoff, Kevin Jaegering, Sebastian Eggert, Axel Pelster, Michael Thorwart, Thore Posske
Summary: Research shows that anyons with arbitrary exchange phases exist on 1D lattices and can be derived from interacting bosons in continuum theories. This theory maintains the exchange phase periodicity similar to 2D anyons and predicts different velocities for left- and right-moving collective excitations.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jing Yang, Adolfo del Campo
Summary: The exchange operator formalism is used to describe many-body integrable systems in terms of phase-space variables. We establish an equivalence between models described by this formalism and the infinite family of parent Hamiltonians describing quantum many-body models with Jastrow form ground states. This allows us to identify the invariants of motion and establish integrability for any model in the family.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Allan D. C. Tosta, Ernesto F. Galvao, Daniel J. Brod
Summary: This study focuses on the dynamics of bosonic and fermionic anyons defined on a one-dimensional lattice under the influence of Gaussian Hamiltonians. It explores the effects of anyonic exchange phase on their bunching behaviors and demonstrates the potential to generate cat states for quantum information processing. Additionally, it shows the possibility of building a deterministic, entangling two-qubit gate using the inherent Aharonov-Bohm effect exhibited by these particles, proving quantum computational universality in these systems.
Article
Materials Science, Multidisciplinary
Wei Tang, Jutho Haegeman
Summary: This paper investigates the microscopic construction of Kac-Moody algebra in continuous systems and validates it through bosonization and Bethe ansatz methods. The computation of Kac-Moody generators is also tested using continuous matrix product state simulations.
Article
Physics, Multidisciplinary
Chao Zhang, Barbara Capogrosso-Sansone, Massimo Boninsegni, Nikolay V. Prokofev, Boris V. Svistunov
Summary: We present results of numerically exact simulations of the Bose one-component plasma, i.e., a Bose gas with pairwise Coulomb interactions among particles and a uniform neutralizing background. We compute the superconducting transition temperature for a wide range of densities, in two and three dimensions, for both continuous and lattice versions of the model. The Coulomb potential causes the weakly interacting limit to be approached at high density, but gives rise to no qualitatively different behavior, vis-à-vis the superfluid transition, with respect to short-ranged interactions. Our results are of direct relevance to quantitative studies of bipolaron mechanisms of (high-temperature) superconductivity.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Tobias Ilg, Hans Peter Buechler
Summary: We study the behavior of the excitation spectrum across the quantum phase transition from a superfluid to a supersolid phase of a dipolar Bose gas in one dimension. Using an effective Hamiltonian that includes beyond-mean-field effects, we analyze the system based on Bogoliubov theory with multiple order parameters. Our results show that the supersolid phase exhibits a stable excitation spectrum with Goldstone modes and an amplitude mode in the low-energy regime, and the transition into the supersolid phase is driven by the roton instability in a parameter regime achievable for dysprosium atoms.
Article
Physics, Fluids & Plasmas
Romain Daviet, Nicolas Dupuis
Summary: The one-dimensional disordered Bose fluid in the Bose-glass phase exhibits chaotic behavior with extreme sensitivity to external parameters. Statistical correlations between two slightly different copies of the system are suppressed at certain length scales, leading to chaotic phenomena.
Article
Physics, Multidisciplinary
H. A. J. Middleton-Spencer, N. G. Parker, L. Galantucci, C. F. Barenghi
Summary: A method to detect the presence and depth of dark solitons in repulsive one-dimensional harmonically trapped Bose-Einstein condensates is presented. The shift of density in Fourier space directly maps onto the depth of the soliton in single soliton systems, and combining spectral methods with imaging techniques allows for determination of soliton characteristics in multi-soliton systems. The detection of solitons by spectral shift is verified to work in the presence of waves induced by density engineering methods, with implications discussed for vortex detection in three-dimensional Bose-Einstein condensates.
Article
Optics
Wei Qi, He-Xiu Zhao, Liang-Wei Dong, Xiao-Fei Zhang
Summary: This study investigates the dynamics of soliton in one-dimensional Bose gas with strong two-body losses, which render the system non-conservative. By employing the perturbed variational approximation, the authors analytically obtain the dynamic equations governing the soliton dynamics in this open system. The results demonstrate that the strong two-body loss rate significantly affects the existence, amplitude, and width of solitons, in contrast to conservative systems without two-body loss.
Article
Physics, Particles & Fields
Kristof Hodsagi, Marton Kormosa, Gabor Takacs
JOURNAL OF HIGH ENERGY PHYSICS
(2019)
Article
Mechanics
Gianluca Lagnese, Federica Maria Surace, Marton Kormos, Pasquale Calabrese
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2020)
Article
Physics, Multidisciplinary
Kristof Hodsagi, Marton Kormos
Article
Physics, Multidisciplinary
Haiyuan Zou, Yi Cui, Xiao Wang, Z. Zhang, J. Yang, G. Xu, A. Okutani, M. Hagiwara, M. Matsuda, G. Wang, Giuseppe Mussardo, K. Hodsagi, M. Kormos, Zhangzhen He, S. Kimura, Rong Yu, Weiqiang Yu, Jie Ma, Jianda Wu
Summary: The study presents V-51 NMR and inelastic neutron scattering (INS) measurements on the quasi-1D antiferromagnet BaCo2V2O8 under transverse field. It reveals a 1D quantum critical point (QCP) at H-c(1D) approximately 4.7 T and provides an unambiguous experimental realization of the massive E-8 phase in the compound. The results offer a new experimental route for exploring the dynamics of quantum integrable systems and physics beyond integrability.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Gianluca Lagnese, Federica Maria Surace, Marton Kormos, Pasquale Calabrese
Summary: We investigated the quantum quench dynamics of a Heisenberg-Ising spin ladder model and observed that the confinement caused by internal interactions has a significant impact on the correlation function's light cone structure, allowing for measurements of the velocities and masses of the mesons.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Materials Science, Multidisciplinary
M. Kormos, D. Voros, G. Zarand
Summary: In this study, we investigate the dynamics of nonintegrable systems belonging to the sine-Gordon family at finite temperature and obtain universal results for the long-time behavior of dynamical correlation functions and the full counting statistics of the topological current.
Article
Materials Science, Multidisciplinary
Jiahao Yang, Weishi Yuan, Takashi Imai, Qimiao Si, Jianda Wu, Marton Kormos
Summary: Considerable recent progress has been made in identifying candidate materials for the transverse-field Ising chain (TFIC), a paradigmatic model for quantum criticality. In this study, we investigate the local spin dynamical structure factor of different spin components in the quantum disordered region of the TFIC. Our findings reveal surprising temperature dependencies in the low-frequency local dynamics of spins in the Ising and transverse-field directions.
Article
Materials Science, Multidisciplinary
Andras Grabarits, Marton Kormos, Izabella Lovas, Gergely Zarand
Summary: In this study, we investigated the typical distribution of quantum work at finite temperature. We found that for small work, the distribution follows a Gaussian distribution and the variance is proportional to the average work. However, at low temperature or for large work, a non-Gaussian distribution with superdiffusive work fluctuations is observed. Additionally, the time dependence of the probability of adiabaticity transitions from an exponential to a stretched exponential behavior. For large average work, the distribution becomes universal, dependent only on temperature and mean work. Our findings suggest that work statistics can be described by a Markovian energy-space diffusion process, starting from a thermal initial state. The validity of our results can be verified through measurements on nanoscale circuits or single qubit interferometry.
Article
Materials Science, Multidisciplinary
Gianluca Lagnese, Federica Maria Surace, Marton Kormos, Pasquale Calabrese
Summary: False vacuum decay, an important topic in physics, can be studied using current optical experiments to simulate particle confinement and understand the rapid evolution of false vacuum. Research shows that the decay rate of false vacuum decreases exponentially as the longitudinal field changes.
Article
Materials Science, Multidisciplinary
Xiao Wang, Haiyuan Zou, Kristof Hodsagi, Marton Kormos, Gabor Takacs, Jianda Wu
Summary: By studying the perturbed quantum critical Ising chain, it is found that two-particle channels exhibit edge singularities at the total mass threshold, while particles with equal masses do not show this singularity. As a result, the dynamic structure factor displays distinct singular features in the continuum region.
Article
Physics, Multidisciplinary
Izabella Lovas, Andras Grabarits, Marton Kormos, Gergely Zarand
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Miklos Antal Werner, Catalin Pasu Moca, Ors Legeza, Marton Kormos, Gergely Zarand
Article
Optics
D. X. Horvath, I Lovas, M. Kormos, G. Takacs, G. Zarand
Article
Materials Science, Multidisciplinary
Bruno Bertini, Lorenzo Piroli, Marton Kormos
Article
Optics
M. Collura, M. Kormos, G. Takacs