Article
Physics, Fluids & Plasmas
Karin Wittmann W, E. R. Castro, Angela Foerster, Lea F. Santos
Summary: The onset of quantum chaos in triple-well potential systems of interacting bosons is investigated. Even in its chaotic regime, the system exhibits features reminiscent of integrability.
Article
Physics, Fluids & Plasmas
Wouter Buijsman, Talia L. M. Lezama, Tamar Leiser, Lea F. Santos
Summary: This article studies the applications of extreme-value distributions in various contexts, with a focus on the ground-state energy distribution of disordered many-body quantum systems. An analytical expression is derived that accurately describes the ground-state energy distribution of the systems, reproducing Tracy-Widom distribution for some models but showing discrepancies for others. The analytical expression captures all of these distributions, playing a similar role as the Brody distribution does for the bulk of the spectrum.
Article
Optics
Manuele Tettamanti, Alberto Parola
Summary: The study investigates the existence and stability of solitonic states in one-dimensional repulsive Bose-Einstein condensates by considering the limit of infinite repulsion. A class of stationary, shape-invariant states propagating at constant velocity are found and compared to the known solution of the Gross-Pitaevskii equation. The results show that typical nonlinear features can be recovered in a purely linear theory when the full many-body physics is correctly taken into account.
Article
Physics, Multidisciplinary
Hyunsoo Ha, Alan Morningstar, David A. Huse
Summary: Many-body localized (MBL) systems cannot reach thermal equilibrium under their own dynamics, even though they are interacting, nonintegrable, and in an extensively excited state. One instability toward thermalization of MBL systems is the avalanche, where a locally thermalizing rare region is able to spread thermalization through the full system. We find a detailed connection between many-body resonances and avalanches in MBL systems.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
C. J. Turner, J-Y Desaules, K. Bull, Z. Papic
Summary: The text explains key concepts and findings in the theory of quantum scarring, demonstrating that quasimodes arise from previously established periodic orbits when quantum fluctuations are restored. The results shed light on the role of the TDVP classical system in Rydberg atom chains and its impact on the system.
Article
Physics, Multidisciplinary
Francesca Pietracaprina, Fabien Alet
Summary: The study suggests the presence of a many-body localization transition in a disordered quantum dimer model on the honeycomb lattice, with conclusions drawn through numerical methods. The results indicate the existence of localization transition within the scale of the system.
Article
Materials Science, Multidisciplinary
S. A. Nikolaev, I. Solovyev, S. Streltsov
Summary: The study unveils the microscopic origin of magnetism in Mo3O8 quantum systems and analyzes the ground state structures and magnetic properties of different compounds under different interaction limits.
NPJ QUANTUM MATERIALS
(2021)
Article
Physics, Multidisciplinary
P. Karpov, F. Piazza
Summary: Multimode optical cavities can be utilized to implement highly tunable interatomic interactions. In an optical lattice with bosonic atoms, quantum self-bound droplets dominate the ground state phase diagram, where their size and density emerge from the competition between local repulsion and finite-range cavity-mediated attraction. Two different regimes in the phase diagram are identified, one resembling the standard Bose-Hubbard model in an external potential, while the other showing direct first order transitions and pronounced metastability between incompressible phases. The leaking cavity field can be measured to distinguish between different types of droplets.
PHYSICAL REVIEW LETTERS
(2022)
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
Multidisciplinary Sciences
Wenhui Li, Xuanlin Zhang, Jia Yang, Song Zhou, Chuangye Song, Peng Cheng, Yi-Qi Zhang, Baojie Feng, Zhenxing Wang, Yunhao Lu, Kehui Wu, Lan Chen
Summary: This study demonstrates room-temperature ferroelectricity in van der Waals layered GaSe down to monolayer with mirror symmetric structures, attributing it to the intralayer sliding of the Se atomic sublayers. The discovery offers great opportunities for novel nonvolatile memory devices and optoelectronics applications.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Pawel Kaniewski, Janusz Romanik, Edward Golan, Krzysztof Zubel
Summary: This paper introduces the concept of the Radio Environment Map (REM) and its construction techniques, presents field test results for the UHF range with different numbers of sensors, and selects the most promising interpolation techniques.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Michael Iversen, N. S. Srivatsa, Anne E. B. Nielsen
Summary: In this study, a weak violation of MBL due to a special state embedded in a spectrum of MBL states is presented. The special state shows logarithmic scaling of the entanglement entropy and bipartite fluctuations of particle number with subsystem size, unlike the MBL states in the bulk of the spectrum. This transition is established by studying the entropy as a function of disorder strength and observing the change in level spacing statistics from Wigner-Dyson to Poisson statistics with increasing disorder strength.
Review
Physics, Multidisciplinary
Natalie Klco, Alessandro Roggero, Martin J. Savage
Summary: Advances in isolating, controlling, and entangling quantum systems have enabled disruptive scientific and technological progress. This article summarizes the thoughts of three domain science theorists on the interface between entanglement, complexity, and quantum simulation, providing a contextualization of recent progress with the scientific objectives of nuclear and high-energy physics.
REPORTS ON PROGRESS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Niklas Boelter, Stefan Kehrein
Summary: The tripartite information is a measure for the scattering and non-localization of information. It can be used as an indicator to distinguish between many-body localized and delocalized states. In the many-body localized regime, the tripartite information signal spreads within a light cone that grows logarithmically in time, similar to entanglement entropy. The tripartite information eventually reaches a plateau with an asymptotic value that is suppressed by strong disorder.
Article
Materials Science, Multidisciplinary
Adith Sai Aramthottil, Mateusz Lacki, Luis Santos, Jakub Zakrzewski
Summary: Intersite dipolar interactions induce nonergodic dynamics for dipolar bosons in an optical lattice, even without disorder. The neglected inherent dipole-induced density-dependent tunneling plays a crucial role in this dynamics. Delocalization is strengthened with increasing dipolar strength, in contrast to the case of hard-core bosons. Interaction-induced hopping should play a crucial role in future experiments on the dynamics of polar lattice gases.
Article
Physics, Multidisciplinary
Dmytro Lotnyk, Anna Eyal, Nikolay Zhelev, Abhilash Sebastian, Yefan Tian, Aldo Chavez, Eric Smith, John Saunders, Erich Mueller, Jeevak Parpia
Summary: The study reveals path-dependent transitions in the He-3 A to B transition, which do not align with the standard B-phase nucleation mechanisms in the literature. This symmetry breaking transition may serve as a potential simulator for first order transitions in the early Universe.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Shovan Dutta, Anton Buyskikh, Andrew J. Daley, Erich J. Mueller
Summary: We introduce a framework for applying matrix product state techniques to continuous quantum systems, which allows for accurate calculations of ground-state wave functions, spatial correlations, and spatial entanglement entropy in the continuum. Our approach combines spatial segmentation and continuous basis functions with numerical density matrix renormalization group techniques. We demonstrate faster convergence than standard grid-based discretization in a mesoscopic system of strongly interacting bosons and showcase the power of our approach by studying a superfluid-insulator transition in an external potential.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Y. Tian, D. Lotnyk, A. Eyal, K. Zhang, N. Zhelev, T. S. Abhilash, A. Chavez, E. N. Smith, M. Hindmarsh, J. Saunders, E. Mueller, J. M. Parpia
Summary: Due to its extreme purity, lack of disorder, and complex order parameter, the first-order superfluid He-3 A-B transition is considered as a leading model system for first order transitions in the early universe. In this study, the path dependence of the supercooling of the A phase is reported over a wide range of pressures below 29.3 bar at nearly zero magnetic field. It is found that the metastability of the A phase is enhanced by transiting through regions where the A phase is more stable, resulting in additional supercooling due to the elimination of B phase nucleation precursors formed upon passage through the superfluid transition.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Thomas G. Kiely, Erich J. Mueller
Summary: This article explores the use of matrix product state approximations for wave functions with spontaneously broken symmetries or criticality. Symmetries and their associated conservation laws result in block-sparse matrix product states, which offer faster numerical calculations and reduced memory requirements. However, in symmetry-broken and critical phases, the block-sparse ansatz leads to less accurate energy estimates. The article aims to characterize the role of conservation laws in matrix product states and determine the circumstances in which they are beneficial.
Article
Optics
Darren Pereira, Erich J. Mueller
Summary: Motivated by cold-atom experiments and a desire to understand far-from-equilibrium quantum transport, this study analytically investigates the dynamics of spin helices in the one-dimensional XX model. The authors find a separation of timescales between in-plane and out-of-plane spin dynamics and discover that the spin correlation functions decay as t-1/2 at long time, in contrast to the experimentally observed exponential decay.
Article
Optics
L. Q. Lai, Y. B. Yu, Erich J. Mueller
Summary: Motivated by recent experiments, the study investigates particle emission from a Bose-Einstein condensate in a one-dimensional lattice with periodically modulated interaction strength. The modulated interactions excite a collective mode and lead to density oscillations, which in turn drive particle emission. The study finds that the emission rate shows a characteristic threshold behavior based on the amplitude dependence, consistent with experimental observations.
Review
Physics, Applied
Patrick M. Harrington, Erich J. Mueller, Kater W. Murch
Summary: This article elaborates on the important role of controlled dissipation in the measurement and control of quantum devices, as well as the applications of dissipation engineering in quantum error correction, quantum sensing, and quantum simulation.
NATURE REVIEWS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Thomas G. Kiely, Erich J. Mueller
Summary: The study focused on superfluidity in the one-dimensional Bose-Hubbard model, determining superfluid density by calculating energy cost in the thermodynamic limit, observing power-law decay of correlation functions, and the relationship between entanglement entropy and bond dimension. Comparison of two algorithms optimization algorithms was conducted, explaining the efficiency difference between VUMPS and iDMRG, and discussing the potential realization in cold-atom experiments.
Article
Optics
Vaibhav Sharma, Erich J. Mueller
Summary: Motivated by recent experiments, this study models the dynamics of a condensed Bose gas in a rotating anisotropic trap. It finds that the condensate remains in the lowest Landau level when the trap anisotropy is slowly switched off. This research contributes to the realization of bosonic analogs of quantum Hall states.
Article
Materials Science, Multidisciplinary
Thomas G. Kiely, Erich J. Mueller
Summary: The study indicates that in the Fermi-Hubbard model, for generic filling, the high-temperature limiting behaviors of electrical and thermal resistivities persist down to temperatures near the hopping matrix element T, while at half filling, anomalous low-temperature scattering results in nearly T-linear electrical resistivity. These findings suggest a continuous connection between T-linear resistivity observed in recent cold atom experiments and weak coupling physics.
Article
Optics
L. Q. Lai, Y. B. Yu, Erich J. Mueller
Summary: This study focuses on particle emission from a Bose-Einstein condensate trapped in a one-dimensional lattice when the interaction strength is modulated. In addition to the well-studied pair emission, single-particle emission is also observed. Using linear response, closed-form expressions for single-particle emission rates are obtained and pair emission rates are reduced to one-dimensional integrals. The full nonlinear theory of single-particle emission is then simplified to a single variable integrodifferential equation, which is numerically solved.
Article
Optics
Akshay Sawhney, Erich J. Mueller
Summary: This study models the transition from superfluid to Mott insulator for a Bose gas on a lattice with two inequivalent sublattices, utilizing the Gutzwiller ansatz to produce phase diagrams and understand the interplay of superfluidity on each sublattice. The splitting of Mott lobes and experimental signatures are explored and described.
Article
Materials Science, Multidisciplinary
Ipsita Mandal, Jia Yao, Erich J. Mueller
Summary: Experiments have shown that insulating behavior emerges in graphene bilayers when the moire bands are partially filled and the top layer is rotated relative to the bottom layer. By calculating charge distributions and estimating excitation gaps, researchers are able to further understand the properties of these phases.
Article
Optics
Vaibhav Sharma, Erich J. Mueller
Summary: The study introduces a set of driven-dissipative protocols for controlling cold atoms in tilted optical lattices and showcases how dissipation can manipulate quantum many-body systems. By employing a specific experimental setup, the research team successfully achieved controllable atom transport in the lattice and generation of self-healing quantum states.
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.
