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
Ivan Morera, Rafal Oldziejewski, Grigori E. Astrakharchik, Bruno Julia-Diaz
Summary: We propose a mechanism for liquid formation in strongly correlated lattice systems by studying dipolar bosons in one-dimensional optical lattices as an example. We present a perturbative theory and validate it through simulations for the energetic and structural properties of the system's phases. We analyze the nonequilibrium properties and calculate the dynamic structure factor.
PHYSICAL REVIEW LETTERS
(2023)
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
Chemistry, Multidisciplinary
Quanzhen Zhang, Yu Zhang, Yanhui Hou, Runzhang Xu, Liangguang Jia, Zeping Huang, Xiaoyu Hao, Jiadong Zhou, Teng Zhang, Liwei Liu, Yong Xu, Hong-Jun Gao, Yeliang Wang
Summary: In this study, the authors demonstrate the precise tuning of one-dimensional confined potential at a homojunction of two single-layer 1T-NbSe2 islands using an in situ manipulation technique. The potential is found to be structurally sensitive and shows a nonmonotonic function of their interspacing. The electronic properties also change from a correlated insulator to a generalized one-dimensional Wigner crystallization with increasing confinement.
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
Clement Duval, Nicolas Cherroret
Summary: We theoretically study the non-equilibrium dynamics of a two-dimensional uniform Bose superfluid after a sudden quantum change, from its short-term coherent dynamics to long-term thermalization. By using a quantum hydrodynamic description and a Keldysh field formalism, we derive quantum kinetic equations for the low-energy phononic excitations of the system and characterize their normal and anomalous momentum distributions. We apply this framework to the interaction change of a 2D Bose gas and investigate the subsequent dynamics of its quantum structure factor and coherence function, both of which have recently been measured experimentally. Our results indicate that, in two dimensions, an independent quasiparticle description quickly becomes inaccurate and should be questioned when dealing with non-equilibrium scenarios.
Article
Physics, Applied
Angang Liang, Shuyu Zhou, Yu Xie, Mingshan Huang, Xinping Xu, Su Fang, Dijun Chen, Tang Li, Bin Wang, Weibiao Chen, Liang Liu
Summary: We experimentally verified our prior theoretical work by using matter-wave interference to measure the ultranarrow momentum width of an optically trapped Bose-Einstein condensate (BEC) in situ. The observed interference fringes exhibited slight deviations from our simplified theory. We found that the discrepancy was caused by the combined effects of the mean-field interaction and spatial density modulation of BEC.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Physical
Miaomiao Song, Yongfeng Huang, Ruixian Hao, Junhao Dong, Wensheng Wu, Zhuang Fu, Baisheng Sa, Jiajie Pei, Jingying Zheng, Hongbing Zhan
Summary: In this study, Ca2CuO3 nanosheets were used to explore the nonlinear optical performance and ultrafast carrier dynamics. The results showed that these nanosheets exhibited convertible nonlinear optical behavior and ultrashort relaxation time, indicating the excellent performance of one-dimensional strongly correlated cuprates.
APPLIED SURFACE SCIENCE
(2022)
Article
Multidisciplinary Sciences
Lennart Sobirey, Niclas Luick, Markus Bohlen, Hauke Biss, Henning Moritz, Thomas Lompe
Summary: This study demonstrates the presence of superfluidity in an ultracold 2D Fermi gas by observing no dissipation below a critical velocity v(c) when moving a periodic potential through the system. The researchers found a maximum in the crossover regime between bosonic and fermionic superfluidity as they measured v(c) as a function of interaction strength. The measurements enable systematic studies of the influence of reduced dimensionality on fermionic superfluidity.
Article
Optics
Jian-Song Pan
Summary: In this study, the superradiant phase transitions of one-dimensional correlated Fermi gases in a transversely driven optical cavity were investigated using bosonization and renormalization group techniques. It was found that the superradiant phase transition can be mapped to the Kosterlitz-Thouless phase transition of an all-to-all sine-Gordon model. Additionally, the nesting effect suggests that the superradiant phase transition can be triggered by an extremely small atom-cavity coupling strength for any nonattractive local interactions.
Article
Physics, Multidisciplinary
Ronan Gautier, Hepeng Yao, Laurent Sanchez-Palencia
Summary: The study reveals a superfluid-to-Bose glass transition in two-dimensional correlated bosons under an eightfold quasicrystal potential, and shows that strong interactions stabilize Mott insulator phases with broken eightfold symmetry.
PHYSICAL REVIEW LETTERS
(2021)
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
Optics
G. Bougas, S. I. Mistakidis, P. Giannakeas, P. Schmelcher
Summary: A scheme is proposed to dynamically excite distinct eigenstate superpositions in three-body Bose-Fermi mixtures, which can be achieved in current experiments by adjusting the scattering lengths to span from weak to strong interactions.
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, 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
Physics, Multidisciplinary
F. Hummel, P. Schmelcher, H. Ott, H. R. Sadeghpour
NEW JOURNAL OF PHYSICS
(2020)
Article
Physics, Multidisciplinary
Jorge Mellado Munoz, Xi Wang, Thomas Hewitt, Anna U. Kowalczyk, Rahul Sawant, Giovanni Barontini
PHYSICAL REVIEW LETTERS
(2020)
Article
Neurosciences
Anna U. Kowalczyk, Yulia Bezsudnova, Ole Jensen, Giovanni Barontini
Summary: Optically Pumped Magnetometers (OPMs) are considered the future of human magnetoencephalography due to their flexibility and adaptability. This study detected auditory evoked brain fields using an OPM based on the nonlinear magneto-optical rotation (NMOR) technique, showcasing excellent performance in non-zero magnetic field environments. Our results demonstrate promising progress towards resilient OPM-based magnetoencephalography systems.
Article
Chemistry, Multidisciplinary
Rahul Sawant, Anna Maffei, Giovanni Barontini
Summary: The study shows that by interacting with a thermal bath of ultracold atoms, a trapped single atom can reach thermal equilibrium and be cooled. Monte Carlo simulations demonstrate the feasibility of using this method within experimental limitations to achieve cooling of the trapped atom.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Philipp Geppert, Max Althoen, Daniel Fichtner, Herwig Ott
Summary: Exploring the dynamics of inelastic and reactive collisions on the quantum level is a fundamental goal in quantum chemistry. Such collisions are of particular importance in connection with Rydberg atoms in dense environments since they may considerably influence both the lifetime and the quantum state of the scattered Rydberg atoms. The authors report on the study of state-changing collisions between Rydberg atoms and ground state atoms, finding that the outcome of such collisions is not limited to a single hydrogenic manifold, and observing a redistribution of population over a wide range of final states. They also find that even the decay to states with the same angular momentum quantum number as the initial state, but different principal quantum number is possible.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Carsten Lippe, Tanita Klas, Jana Bender, Patrick Mischke, Thomas Niederprum, Herwig Ott
Summary: Three-dimensional spin models with random hopping disorder are relevant to a wide range of physical systems. In an experimental realization in a Rydberg system with dipole-dipole coupling, the authors showed signatures of a localization-delocalization transition. The study suggests that even small imperfections can significantly alter the transport properties of a system.
NATURE COMMUNICATIONS
(2021)
Article
Quantum Science & Technology
G. Barontini, L. Blackburn, V. Boyer, F. Butuc-Mayer, X. Calmet, J. R. Crespo Lopez-Urrutia, E. A. Curtis, B. Darquie, J. Dunningham, N. J. Fitch, E. M. Forgan, K. Georgiou, P. Gill, R. M. Godun, J. Goldwin, V. Guarrera, A. C. Harwood, I. R. Hill, R. J. Hendricks, M. Jeong, M. Y. H. Johnson, M. Keller, L. P. Kozhiparambil Sajith, F. Kuipers, H. S. Margolis, C. Mayo, P. Newman, A. O. Parsons, L. Prokhorov, B. I. Robertson, J. Rodewald, M. S. Safronova, B. E. Sauer, M. Schioppo, N. Sherrill, Y. V. Stadnik, K. Szymaniec, M. R. Tarbutt, R. C. Thompson, A. Tofful, J. Tunesi, A. Vecchio, Y. Wang, S. Worm
Summary: This article discusses how a network of atomic and molecular clocks can be used to detect variations in fundamental constants, with a focus on the QSNET project. The authors describe the goals and expected performance of QSNET, and highlight its potential to discover new physics and shed light on the nature of dark matter and dark energy.
EPJ QUANTUM TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
J. Benary, C. Baals, E. Bernhart, J. Jiang, M. Roehrle, H. Ott
Summary: In this work, we study a multi-mode system of driven nonlinear optical resonator using an ultracold bosonic quantum gas. We measure the effective Liouvillian gap of the system and provide evidence for a first order dissipative phase transition. The multi-mode nature of the system allows us to identify a non-equilibrium condensation process.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jian Jiang, Erik Bernhart, Marvin Roehrle, Jens Benary, Marvin Beck, Christian Baals, Herwig Ott
Summary: We report the experimental realization of a Kapitza trap for ultracold atoms. This is achieved by using time-periodic attractive and repulsive Gaussian potentials, creating an effective trap with a time average potential of zero. The analysis includes the impact of experimental imperfections, stability of the trapped atomic cloud, and magnitude of the effective potential. The results show good agreement with the high-frequency expansion of the underlying system dynamics. This experimental approach opens up new opportunities to study Floquet systems of neutral atoms.
PHYSICAL REVIEW LETTERS
(2023)
Article
Optics
Guobin Liu, Vera Guarrera, Sihong Gu, Shougang Zhang
Summary: The dynamics of a comagnetometer based on an alkali-metal-noble-gas hybrid tri-spin system were studied. Results showed a linear increasing response of the comagnetometer signal under certain parameters satisfying an overdamping condition. The inherent dynamics of the hybrid tri-spin system impose an upper limit for the signal amplitude of the comagnetometer, with results consistent with current experimental data and providing guidance for future experiments.
Article
Physics, Multidisciplinary
Aaron Smith, Thomas Easton, Vera Guarrera, Giovanni Barontini
Summary: The research team utilized a superluminescent diode to realize and characterize optical potentials for ultracold atoms, finding that it significantly reduces interference effects while maintaining high intensity and good beam focusing compared to lasers. They demonstrated that these optical potentials can be used to arrange atoms in arbitrary structures and manipulate them dynamically.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Multidisciplinary
V Guarrera, R. Gartman, G. Bevilacqua, W. Chalupczak
Summary: Researchers have successfully applied a nonstandard analysis method of spin-noise spectroscopy to study noise squeezing in out-of-equilibrium nonlinear atomic systems. They discovered asymmetry in the noise distribution of atomic signal quadratures, investigated the mechanism behind its generation and evolution, and identified a structure in the spectrum that helps to understand the characteristics of the noise process.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Christian Baals, Alexandre Gil Moreno, Jian Jiang, Jens Benary, Herwig Ott
Summary: The study focuses on the stability and attractor dynamics of an elongated Bose-Einstein condensate with dark or gray kink solitons in the presence of localized dissipation. It was found that there is a threshold value for the stabilization of the dark soliton, and above this threshold, attractor dynamics towards the dark soliton are observed. Additionally, the dark soliton was identified as the unique steady-state of the system for all initial conditions.
Article
Optics
Jorge Mellado Munoz, Rahul Sawant, Anna Maffei, Xi Wang, Giovanni Barontini
