Article
Multidisciplinary Sciences
Guido Masella, Nikolay Prokof'ev, Guido Pupillo
Summary: This study shows that in one-dimensional chains, disordered bosonic particles may exist in a conducting but non-superfluid phase, characterized by unconventional properties that do not fit into existing descriptions.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Hadiseh Alaeian, Berislav Buca
Summary: In this study, by utilizing modulated dynamical symmetries, the existence of multistability in the presence of quantum fluctuations is exactly proven in a driven-dissipative fermionic chain. Unlike the mean-field level, the quantum fluctuations themselves exhibit multistability.
COMMUNICATIONS PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Matthew R. Carbone, David R. Reichman, John Sous
Summary: The study generalizes the family of approximate momentum average methods to formulate an efficient algorithm for computing the Green's function of particles dressed by bosons, demonstrating superior performance and potential for extension to different physical scenarios. The approach is successfully applied to several important models in solids and molecular complexes, showcasing its ability to provide exact numerical results in extreme adiabatic limits.
Article
Physics, Multidisciplinary
M. Mikkelsen, T. Fogarty, Th Busch
Summary: This study investigates the relationship between information scrambling and work statistics for short-range interacting particles in a one-dimensional harmonic trap. It finds that scrambling requires finite interactions and establishes a connection between scrambling properties and induced work fluctuations, which are directly observable in modern cold-atom experiments.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Yang Zhao
Summary: This Perspective provides an overview of the development and applications of Davydov's Ansatze in computational chemical physics. The solitons proposed by Davydov in the 1970s have been proven to be accurate variational ground-state wave functions for the Holstein molecular crystal model. Multiple Davydov Ansatze have been proposed as improvements of their single-Ansatz parents. The time-dependent variational formalism is used to extract accurate dynamic and spectroscopic properties using Davydov's Ansatze as trial states.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Shoki Koyanagi, Yoshitaka Tanimura
Summary: This study investigates the efficiency of a quantum Carnot engine based on open quantum dynamics theory. By numerical simulations and thermodynamic analysis, it is found that the maximum efficiency is determined solely by the bath temperatures, in line with Carnot's theorem.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Shoki Koyanagi, Yoshitaka Tanimura
Summary: Efficiency of a quantum Carnot engine based on open quantum dynamics theory was investigated, with numerical simulations and analysis showing that maximum efficiency is solely determined by bath temperatures.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Stanley S. Coelho, Lucas Queiroz, Danilo T. Alves
Summary: This article investigates the dynamics of harmonic oscillators with abrupt frequency jumps and presents expressions for energy, excitations, and transition probabilities using the Lewis-Riesenfeld method. The findings demonstrate that even with lower frequency jumps, the average energy of the oscillator remains equal to or greater than before the jumps.
Article
Physics, Multidisciplinary
Wen Wei Ho, Soonwon Choi
Summary: We present a novel kind of emergent random matrix universality exhibited by quantum manybody systems at infinite temperature. The ensemble of pure states supported on a small subsystem, generated from projective measurements of the remainder of the system, approaches a universal form independent of system details. This implies that the distribution of quantum states becomes indistinguishable from uniformly random ones, opening up new ways for quantum state tomography and benchmarking.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Physical
Pablo E. Videla, Victor S. Batista
Summary: An exact path-integral formalism is introduced for calculating multi-time quantum correlation functions, using canonical averages over ring-polymer dynamics in imaginary time. The formulation exploits the symmetry of path integrals with respect to permutations in imaginary time, expressing correlations as products of imaginary-time-translation-invariant phase-space functions coupled through Poisson bracket operators. The method recovers the classical limit of multi-time correlation functions and provides an interpretation of quantum dynamics in terms of interfering trajectories of the ring-polymer in phase space. The introduced phase-space formulation provides a rigorous framework for the future development of quantum dynamics methods that exploit the invariance of imaginary time path integrals to cyclic permutations.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Mechanics
A. Viudez
Summary: Exact solutions of the time-dependent three-dimensional nonlinear vorticity equation for Euler flows with spherical geometry are provided. The velocity solution is the sum of a multipolar oscillatory function and a rigid cylindrical motion with swirl. These solutions are important for understanding inertial oscillations and nonlinear effects in multipolar flows.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mathematics, Applied
E. C. Gabrick, J. Trobia, A. M. Batista, E. K. Lenzi
Summary: This study investigates the solutions for a time-dependent potential by considering two scenarios for the fractional Schrodinger equation. The first scenario analyzes the influence of the time-dependent potential without the kinetic term, obtaining analytical and numerical solutions using the Caputo fractional time derivative, which extends Rabi's model. In the second scenario, the kinetic term is incorporated in the Schrodinger equation along with fractional spatial derivatives, and the spreading of the Gaussian wave package under the action of time and spatial fractional differential operators is analyzed.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Physics, Multidisciplinary
Or Katz, Marko Cetina, Christopher Monroe
Summary: We present a simple protocol for generating N-body entangling interactions between trapped atomic ion qubits in a single step. By utilizing qubit state-dependent squeezing operations and displacement forces on the collective atomic motion, full N-body interactions can be achieved. This N-body gate operation allows for the single-step implementation of a family of N-bit gate operations, including the powerful N-Toffoli gate.
PHYSICAL REVIEW LETTERS
(2022)
Article
Quantum Science & Technology
K. Andrzejewski
Summary: The dynamical aspects of information-theoretic and entropic measures of quantum systems are studied in this article. It is shown that the increase of entropy and dynamics of Fisher information can be directly described and related for the time-dependent harmonic oscillator and charged particle in certain time-varying electromagnetic fields. Various examples are considered to illustrate these results in a elementary form. The integrals of (geodesic) motion associated with some conformal Killing vectors are shown to lead to the Ermakov-Lewis invariants for the considered electromagnetic fields. The dynamics of entanglement entropy of coupled oscillators with continuous time-dependent parameter is explicitly worked out, and the aspects of quantum-classical transition, in particular decoherence, are analyzed. Finally, the behavior of quantum quenches for mutually non-interacting non-relativistic fermions in a harmonic trap in the presence of critical points is studied in detail.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Physics, Multidisciplinary
Michel Panhans, Sebastian Hutsch, Frank Ortmann
Summary: In this study, numerical and analytical quantum approaches are used to investigate the charge transfer dynamics in organic solids. The fading of transient localization and the formation of polarons are revealed in a wide range of vibrational frequencies and temperatures. Three distinct charge transport regimes, including transient localization, Soft Gating, and polaron transport, are identified, and the transitions between these regimes are found to be governed by the correlations between electronic motion and nuclei.
COMMUNICATIONS PHYSICS
(2023)
Review
Physics, Multidisciplinary
Axel U. J. Lode, Camille Leveque, Lars Bojer Madsen, Alexej Streltsov, Ofir E. Alon
REVIEWS OF MODERN PHYSICS
(2020)
Article
Quantum Science & Technology
Rui Lin, Paolo Molignini, Luca Papariello, Marios C. Tsatsos, Camille Leveque, Storm E. Weiner, Elke Fasshauee, R. Chitra, Axel U. J. Lode
QUANTUM SCIENCE AND TECHNOLOGY
(2020)
Article
Physics, Multidisciplinary
Frank Schaefer, Miguel A. Bastarrachea-Magnani, Axel U. J. Lode, Laurent de Forges de Parny, Andreas Buchleitner
Article
Physics, Multidisciplinary
Budhaditya Chatterjee, Camille Leveque, Joerg Schmiedmayer, Axel U. J. Lode
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Anal Bhowmik, Sudip Kumar Haldar, Ofir E. Alon
SCIENTIFIC REPORTS
(2020)
Article
Engineering, Aerospace
E. A. Pavlova, M. V. Zakhvatkin, A. I. Streltsov, V. A. Voropaev, L. V. Elenin
Summary: The article summarizes practical experience in preventing hazard events in near-Earth space, including mathematical calculations of collision probability, detection of potentially hazardous asteroids, and general principles for detecting potentially hazardous conjunction of space objects. The approaches to forming a common classification system for hazard events in near-Earth space are considered, with a description of the components of the classification system presented as separate units.
Article
Physics, Multidisciplinary
Axel U. J. Lode, Sunayana Dutta, Camille Leveque
Summary: The dynamics of two-dimensional interacting ultracold bosons in an artificial gauge field were studied, revealing the implantation of angular momentum and emergence of fragmentation in the system. The experimental assessment of fragmentation and angular momentum was demonstrated to be possible through statistical analysis of image entropy variance.
Article
Multidisciplinary Sciences
Ofir E. Alon
Summary: The anisotropy of a trapped Bose-Einstein condensate was studied, showing differences in anisotropy at the many-body and mean-field levels despite having the same densities per particle. This provides a way to classify correlations via the morphology of 100% condensed bosons in a three-dimensional trap at the limit of an infinite number of particles.
Article
Optics
Michael Hughes, Axel U. J. Lode, Dieter Jaksch, Paolo Molignini
Summary: With the advancement in controlling and manipulating ultracold magnetic atoms and dipolar molecules, it is now possible to quantum simulate lattice models with strongly interacting dipole-dipole interactions and high densities. However, this study demonstrates that in regimes of strong dipole-dipole interactions and high densities, the continuum system fails to accurately recreate the desired lattice model. Two-band Hubbard models are required to reduce the discrepancies between continuum and lattice descriptions, but significant deviations in the density profile still remain.
Article
Optics
Paolo Molignini, Camille Leveque, Hans Kessler, Dieter Jaksch, R. Chitra, Axel U. J. Lode
Summary: This study investigates the infinite-range interactions in a one-dimensional boson array mediated by a laser-driven dissipative optical cavity. The results show that, at high laser pump powers, observables including density distributions, correlation functions, and superradiance order parameters become identical for both bosons and fermions. The study also reveals the compensation effect of cavity-mediated interactions on the reduction in the strength of contact interactions needed to trigger crystallization.
Article
Physics, Atomic, Molecular & Chemical
Ofir E. Alon
Summary: In this study, the fragmentation of pairs in a trapped mixture of Bose-Einstein condensates is investigated using a solvable model. The analysis shows that entanglement between two different species of bosons persists even as the number of particles approaches infinity.
Article
Optics
Axel U. J. Lode, Rui Lin, Miriam Buettner, Luca Papariello, Camille Leveque, R. Chitra, Marios C. Tsatsos, Dieter Jaksch, Paolo Molignini
Summary: This study demonstrates how artificial neural networks can optimize the extraction of observables from single-shot images, accurately obtaining both one- and two-particle densities, as well as extracting momentum-space observables from real-space single-shot images. With this technique, reconfiguring the experimental setup only once to obtain training data may lead to a significant reduction in resources.
Article
Physics, Multidisciplinary
Julian Arnold, Frank Schaefer, Martin Zonda, Axel U. J. Lode
Summary: The current interest lies in fully automated classification methods that offer direct physical insights into phase diagrams. It is desired to have interpretable methods that can explain why they classify phases as they do, and ideally these methods should be unsupervised, not requiring prior labeling or knowledge of phases. An unsupervised machine-learning method for phase classification is demonstrated here, made interpretable through an analytical derivation of the functional relationship between its predictions and input data, showcasing a physically-motivated, mean-based approach that is computationally efficient and directly explainable.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Rui Lin, Paolo Molignini, Axel U. J. Lode, R. Chitra