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
Multidisciplinary Sciences
Pedro M. T. Vianez, Yiqing Jin, Maria Moreno, Ankita S. Anirban, Anne Anthore, Wooi Kiat Tan, Jonathan P. Griffiths, Ian Farrer, David A. Ritchie, Andrew J. Schofield, Oleksandr Tsyplyatyev, Christopher J. B. Ford
Summary: This study investigates many-body modes in gated one-dimensional wires and observes two parabolic dispersions associated with spin and charge excitations at high energies. It also discovers two additional one-dimensional replica modes that strengthen with decreasing wire length.
Article
Optics
Yuta Sekino, Yusuke Nishida
Summary: The study focuses on local quantum field theories for one-dimensional Bose and Fermi gases, connected by Girardeau's Bose-Fermi mapping. It is found that while bosons require only a two-body interaction term, fermions need a marginally relevant three-body interaction. The presence of this three-body interaction leads to the appearance of a three-body contact in the energy relation for fermions, impacting momentum distribution and sum rules. Additionally, universal large-energy and momentum asymptotics for dynamic structure factor and single-particle spectral density are derived using the operator product expansion, applicable to any 1D scattering length at any temperature. Discussions also include the behavior of Tonks-Girardeau gas with hardcore repulsion and the Bose-Fermi correspondence in the presence of three-body attractions.
Article
Physics, Multidisciplinary
Tomohiro Tanaka, Yusuke Nishida
Summary: The study shows that one-dimensional Bose and Fermi gases exhibit weak-strong duality under contact interactions, extending beyond thermodynamics to the frequency-dependent complex bulk viscosity.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics, Interdisciplinary Applications
Xiuye Liu, Jianhua Zeng
Summary: In this study, the formation, properties, and dynamics of matter-wave structures in one-dimensional LHY quantum fluids are analyzed and numerically simulated. The findings are significant for quantum-gas experiments, providing new insights into low-dimensional LHY physics.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Optics
Andrzej Syrwid
Summary: The tutorial discusses the application of solitons in the quantum world and introduces the Lieb-Liniger and Yang-Gaudin models in ultracold Bose and Fermi systems. These models are exactly solvable using the Bethe ansatz technique, aiding in the exploration of the quantum nature of solitonic excitations.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Clemens Kuhlenkamp, Michael Knap, Marcel Wagner, Richard Schmidt, Atac Imamoglu
Summary: In this paper, we theoretically analyze a solid-state analog of Feshbach resonances in two-dimensional semiconductor heterostructures. By tuning the applied electric field, the scattering of excitons and electrons occupying different layers can be resonantly enhanced, leading to the formation of an interlayer Feshbach molecule. This discovery has potential implications for the realization of correlated Bose-Fermi mixtures in bilayer semiconductors.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Li Yang, Shah Saad Alam, Han Pu
Summary: This article reviews some work on strongly interacting 1D spinor quantum gas, discussing a generalized Bose-Fermi mapping and constructing an ansatz wavefunction for the strongly interacting system.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
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
Mathematics, Interdisciplinary Applications
Abdelaali Boudjemaa, Khelifa Mohammed Elhadj
Summary: We investigate the behavior of discrete quantum droplets in one-dimensional binary Bose mixtures. By solving the generalized discrete Gross-Pitaevskii equation, we obtain analytical expressions for various properties of small droplets. Our results show that the stationary state of small droplets remains intact for weak lattice coupling, while irregular dynamics and flat-top plateau are observed for relatively strong coupling. Additionally, we find that the interaction between two droplets is weak and they cannot form a bound-state due to the interplay of discreteness and quantum fluctuations.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Optics
Kai Yen Jee, Erich Mueller
Summary: Using kinetic theory, we modeled the dynamics of a small Bose condensed cloud of heavy particles moving through a larger degenerate Fermi gas of light particles. By varying the Bose-Fermi interaction, we observed a transition between bulk- and surface-dominated regimes. Our calculations of the dipole mode in a harmonic trap showed excellent agreement with experimental studies of Cs-Li mixtures, confirming the accuracy of our stochastic model.
Article
Physics, Multidisciplinary
I Bouchoule, J. Dubail
Summary: This study reveals that the Tan relation breaks down in the one-dimensional Bose gas with contact repulsion for a peculiar class of stationary states. These states, characterized by a rapidity distribution that decreases as 1/|p|^4, exist due to the infinite number of conserved quantities in the system. The rapidity tail in the momentum distribution adds to the usual Tan contact term, and is produced by atom losses leading to ghost singularities in the wave function.
PHYSICAL REVIEW LETTERS
(2021)
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
Multidisciplinary Sciences
Ruwan Senaratne, Danyel Cavazos-Cavazos, Sheng Wang, Feng He, Ya-Ting Chang, Aashish Kafle, Han Pu, Xi-Wen Guan, Randall G. Hulet
Summary: Confining ultracold atoms to periodic potentials is a powerful method for simulating complex many-body systems. In this study, we confined fermions to one dimension to realize the Tomonaga-Luttinger liquid model and observed a velocity shift of spin and charge excitations in opposite directions, indicating the existence of spin-charge separation.
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)