Article
Astronomy & Astrophysics
Mudit Jain, Mustafa A. Amin
Summary: We first introduce the effective nonrelativistic theory of gravitationally interacting, massive integer-spin fields and derive the corresponding equations of motion. Then, we construct a set of gravitationally supported solitons by using polarized plane waves, which have extremal polarization and large spin but no orbital angular momentum. These solitons can be used to generate partially polarized solitons.
Article
Astronomy & Astrophysics
Raghuveer Garani, Dmitry Levkov, Peter Tinyakov
Summary: Black holes with masses approximate to 1 M circle dot cannot be formed through stellar evolution, but gravitational collapse of neutron stars triggered by the accumulation of dark matter can realize this scenario. Our study demonstrates that despite the conflicting requirements on the interactions of dark matter particles, the transmutation process can be achieved in bosonic dark matter models. We show that deformations at large fields can lead to the unavoidable collapse of dark matter into a black hole in models with efficient dark matter accumulation.
Article
Astronomy & Astrophysics
Carla Henriquez-Baez, Marcela Lagos, Aldo Vera
Summary: In this study, analytical solutions describing black holes and black strings in the Einstein SU(N)-nonlinear sigma model were constructed using the embedding ansatz and parametrization methods. These configurations not only satisfy the model equations but also demonstrate the impact of the flavor number on the geometry and thermodynamics.
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
Materials Science, Multidisciplinary
Alan Morningstar, Luis Colmenarez, Vedika Khemani, David J. Luitz, David A. Huse
Summary: In this study, we numerically investigate the avalanche instability and many-body resonances in strongly disordered spin chains exhibiting many-body localization (MBL). We find that finite-size systems behave like MBL within the MBL regimes, and we identify landmarks that divide the MBL regimes into different subregimes based on the onset of avalanches and many-body resonances.
Article
Public, Environmental & Occupational Health
Hyun Joon Park, Sara Chari Francisco, M. Rosemary Pang, Lulu Peng, Guangqing Chi
Summary: The Black Lives Matter (BLM) movement aims to ensure the safety and cultural expression of Black people, while counter-movements against BLM may undermine this support. This study found that residing in areas with a high prevalence of negative stances on BLM is associated with worse health outcomes, including higher BMI and obesity rates among Black individuals.
SOCIAL SCIENCE & MEDICINE
(2023)
Article
Mechanics
Zhong Du, Xi-Yang Xie, Xiao-Yu Wu, Xue-Hui Zhao
Summary: This paper studies mixed localized waves and their dynamics based on the matrix Lakshmanan-Porsezian-Daniel equation. Different types of interactions between rogue waves and breathers are described, providing useful insights for the study of nonlinear wave interactions in physical systems.
Article
Quantum Science & Technology
N. Goldman, O. K. Diessel, L. Barbiero, M. Pruefer, M. Di Liberto, L. Peralta Gavensky
Summary: This work examines the potential of generating and manipulating unconventional nonlinearities in systems governed by the nonlinear Schrodinger equation (NLSE) through periodic driving. It demonstrates that effective NLSE with emergent nonlinearities accurately captures the behavior of such driven systems, which can be finely controlled by tuning the driving sequence.
Article
Materials Science, Multidisciplinary
Hossein Dehghani, Ze-Pei Cian, Mohammad Hafezi, Maissam Barkeshli
Summary: In this paper, the authors demonstrate how to extract the Chern number from a single many-body wave function and discuss the additional integer invariant required for FQH states. The validity of the method is confirmed through extensive numerical simulations involving IQH and FQH states.
Article
Physics, Multidisciplinary
Josselin Garnier, Kilian Baudin, Adrien Fusaro, Antonio Picozzi
Summary: By increasing the nonlinearity, a system self-organizes into an incoherent localized structure containing hidden coherent soliton states, which are fully immersed in random wave fluctuations and can hardly be identified in usual spatial or spectral domains but clearly unveiled in phase-space representation. The hidden solitons are stabilized and trapped by the incoherent localized structure, and can be observed in nonlocal nonlinear optics experiments through the measurement of the spatial spectrogram. This regime sheds new light on the quantum-to-classical correspondence with gravitational interactions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Mathematics, Interdisciplinary Applications
Cui-Cui Ding, Qin Zhou, Si-Liu Xu, Yun-Zhou Sun, Wen-Jun Liu, Dumitru Mihalache, Boris A. Malomed
Summary: In this study, we investigate the controlled evolution of nonautonomous solitons in a spinor Bose-Einstein condensate. By analyzing a system of three coupled Gross-Pitaevskii equations with spatiotemporal modulation, we derive an integrability condition and a nonisospectral Lax pair. This allows us to obtain an infinite set of dynamical invariants and generate one- and two-soliton solutions using the Darboux transform. We find various solutions for controlled nonautonomous solitons, including self-compressed, snake-like, stepwise solitons, and even rogue wave-like states.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Astronomy & Astrophysics
Enzo Figueiredo, Andrea Maselli, Vitor Cardoso
Summary: We present a numerical approach for finding asymptotically flat black hole solutions with anisotropic fluids and generic density profiles. Our model has various applications in realistic astrophysical scenarios, including the description of galaxies hosting supermassive black holes, dark matter environments, and accretion phenomena. We apply this framework to black holes surrounded by different families of dark matter profiles and study the geodesic motion of particles as well as gravitational perturbations induced by a small secondary object. Our analysis confirms and extends previous studies on the effects of gravitational redshift on orbital frequencies and axial fluxes.
Review
Chemistry, Physical
Hao Li, S. A. Shah, Ajay Ram Srimath Kandada, Carlos Silva, Andrei Piryatinski, Eric R. Bittner
Summary: In this paper, we review a recent quantum stochastic model for predicting spectroscopic signals, which takes into account the presence of coevolving and nonstationary background excitations. Starting from a field theory description and a simplified model, optical excitons are coupled to an incoherent background through scattering and screened Coulomb coupling. The Heisenberg equations of motion for the optical excitons are driven by an auxiliary stochastic population variable, modeled as a solution of an Ornstein-Uhlenbeck process. We discuss the distinct spectral signatures arising from direct and exchange coupling to the bath, as well as the mathematical limits on extracting the background density of states by inverting the spectral signatures.
ANNUAL REVIEW OF PHYSICAL CHEMISTRY
(2023)
Article
Engineering, Electrical & Electronic
Khalil Aliane, Yves Elskens, Frederic Andre, Damien F. G. Minenna
Summary: Comparative study between two multi-particle time domain methods, DIMOHA and RUBEUS, revealed parallel equations and variables, with DIMOHA being more flexible than RUBEUS. Testing in steady-state simulation explained discrepancies with experimental results and demonstrated excellent agreement with RUBEUS when used for ultra-short pulses.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Physics, Fluids & Plasmas
Jieli Qin, Lu Zhou
Summary: The collision of two self-trapped atomic matter wave packets in an optical ring cavity leads to various collision phenomena depending on the magnitude of colliding velocity. Different features are observed compared to the cavity-free case, with low velocity collisions resulting in oscillations, medium velocity collisions being highly phase sensitive, and high velocity collisions leading to packet fragmentation. Beyond a certain limit, the colliding wave packets exhibit behavior similar to classical particles before experiencing severe spatial spreading.
Article
Physics, Multidisciplinary
G. C. Katsimiga, S. Mistakidis, P. Schmelcher, P. G. Kevrekidis
Summary: This study investigates the phase diagram, stability, magnetic properties, and dynamics of nonlinear solitary wave excitations in different phases of a spinor F = 1 Bose-Einstein condensate. Various types of nonlinear excitations, such as dark-dark-bright solitons, dark-bright-bright solitons, and dark-dark-dark solitons, are found to exist in different phases with varying stability. The transitions between phases and the behavior of these solitons at finite temperatures are also explored, shedding light on the systematic production and analysis of spin transfer processes of similar waveforms observed in ultracold experiments.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Peter Schmelcher
Summary: The spectral properties and behavior of confining superexponential potentials were explored, analyzing various prototypes in terms of eigenvalues and eigenstates. The self-interacting oscillator showed scaling behavior while the power law modified oscillator had alternating behavior. Superexponential potentials with an oscillating power exhibited a rich spectral structure with localized eigenstates and alternating even-odd pairs in the spectrum. Perspectives for future applications, including cold atom physics, were discussed.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Multidisciplinary
Jie Chen, Simeon Mistakidis, Peter Schmelcher
Summary: In this study, we investigate the polaronic properties of a single impurity immersed in a weakly interacting bosonic environment confined within a one-dimensional double-well potential using an exact diagonalization approach. We find that the occurrence of the polaron orthogonality catastrophe is signified by a vanishing residue with an increase of the impurity-bath coupling. We obtain the asymptotic configurations of the systems' ground state wave function in the strongly interacting regime by means of a Schmidt decomposition, which accounts for the observed orthogonality catastrophe of the polaron.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
S. Mistakidis, G. M. Koutentakis, F. Grusdt, P. Schmelcher, H. R. Sadeghpour
Summary: In this study, we investigate the formation and phase diagram of magnetic Bose polaron in a one-dimensional spinor Bose gas. The residue of magnetic polarons decreases significantly with strong impurity-spin interactions. Impurities can be utilized to manipulate spin polarization and suppress spin-spin correlations in the magnetic medium.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Ansgar Siemens, Peter Schmelcher
Summary: This study investigates the classical equilibrium properties and metamorphosis of the ground state of interacting dipoles with fixed locations. The dipoles form separate intertwined chains which can be tuned by geometrical parameters, resulting in a self-similar bifurcation diagram linked to the Stern-Brocot tree and the Farey sequence.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Optics
Jie Chen, Simeon Mistakidis, Peter Schmelcher
Summary: We investigate the correlated quantum quench dynamics of a single impurity immersed in a bosonic environment confined in a one-dimensional double-well potential. By analyzing the time-evolved many-body wave function, we find that a two-fold fragmented many-body state is dynamically formed when the impurity interacts with the non-interacting bosonic bath. However, increasing the strength of the impurity-bath coupling leads to the destruction of the two-fold fragmentation due to additional inter-band excitation dynamics.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2023)
Article
Optics
I. A. Englezos, S. I. Mistakidis, P. Schmelcher
Summary: We study one-dimensional harmonically confined quantum droplets in two-component mixtures using a nonperturbative approach. In symmetric homonuclear settings, beyond-Lee-Huang-Yang correlations result in flat-top droplet configurations for decreasing intercomponent attraction or larger atom number. Asymmetric mixtures feature spatial mixing and the more strongly interacting or heavier component exhibits flat-top structures. Quenches on the harmonic trap trigger the lowest-lying collective droplet excitations, and the interaction-dependent breathing frequency shows a decreasing trend for stronger attractions. Predictions within the Lee-Huang-Yang framework are obtained. Relatively large quench amplitudes cause delocalization of the droplet, higher-lying motional excitations in its core, enhanced intercomponent entanglement, and long-range correlations. In contrast, the dipole motion remains robust. Species-selective quenches lead to dephasing or irregular dipole patterns due to intercomponent collisions.
Article
Optics
Daniel J. Bosworth, Frederic Hummel, Peter Schmelcher
Summary: We show that the recently observed long-range ion-Rydberg molecules can be split into two families with unique electronic structures resulting from the ion-induced admixture of different Rydberg nP states. We predict that these molecular states can bind additional ground-state atoms, forming charged ultralong-range Rydberg molecules with similar binding energies as nonpolar ULRMs. This has been demonstrated by considering a Rydberg atom interacting with a single ground-state atom and an ion, breaking the system's symmetry and leading to mixing between decoupled states.
Article
Optics
G. C. Katsimiga, S. I. Mistakidis, K. Mukherjee, P. Schmelcher, P. G. Kevrekidis
Summary: This paper investigates the existence, stability, and quench-induced dynamics of vortex-bright type excitations in two-dimensional harmonically confined spin-1 Bose-Einstein condensates. Linearly stable vortex-bright-vortex and bright-vortex-bright solutions occur in both antiferromagnetic and ferromagnetic spinor gases with variations in the quadratic Zeeman energy shift. The deformations of these solutions during relevant transitions are discussed, revealing that emergent instabilities can lead to pattern formation. The study also unveils spatial elongations, precessional motion, and spiraling of the nonlinear excitations when exposed to finite temperatures and crossing distinct phase boundaries via quenching of the quadratic Zeeman coefficient. Spin-mixing processes triggered by the quench result in changes in the waveform of the configurations. The findings highlight the interplay between pattern formation and spin-mixing processes in contemporary cold atom experiments.
Article
Optics
Xiang Gao, Ya-Fen Cai, Shao-Jun Li, Shou-Long Chen, Xue-Ting Fang, Qian-Ru Zhu, Lushuai Cao, Peter Schmelcher, Zhong-Kun Hu
Summary: Magnetic monopoles have been observed as quasiparticles in condensed matter and ultracold atomic systems. This study explores the interaction between monopoles and magnons in an atomic pseudospin chain. The monopole excites a virtual magnon cloud in the chain, resulting in a unique type of polaron known as the monopole-cored polaron (MCP). The magnon dressing affects the monopole hopping and leads to an antitrapping effect, enhancing the mobility of the MCP.
Article
Optics
Judith Becker, Maxim Pyzh, Peter Schmelcher
Summary: We investigate the dynamic transport of an impurity between different majority species separated in a spatially double well. The impurity transfer and storage are achieved by dynamically changing the interaction strengths between the impurity and the two majority species. We propose a simple and efficient protocol utilizing linear ramps of majority-impurity interactions at specific times to control the impurity. Our study, conducted with the multilayer multiconfiguration time-dependent Hartree method, includes analysis of single-particle densities, entanglement growth, and an effective potential description involving mean fields of the interacting components. The stability of the transport and storage properties is unexpectedly affected by interspecies correlations.
Article
Optics
Xiang Gao, Shao-Jun Li, Shou-Long Chen, Xue-Ting Fang, Qian-Ru Zhu, Xing Deng, Lushuai Cao, Peter Schmelcher, Zhong-Kun Hu
Summary: This study explores the conditions for the coexistence and interaction effects between magnetic monopoles and kinks in an atomic dipolar superlattice gas. It is found that there is a binding effect between the monopole and kink, which alters the dispersion of the kink.
Article
Optics
Friethjof Theel, Simeon Mistakidis, Kevin Keiler, Peter Schmelcher
Summary: We investigate the dynamics of two correlated impurities in a double well coupled to a one-dimensional bosonic medium. By studying the entanglement between the impurities and the medium, as well as the impurities' two-body correlations, we determine the ground-state phase diagram of the system. Our results show that the impurity structures and the intervals of existence strongly depend on the interactions between the impurities and the external confinement of the medium.
Article
Optics
A. Romero-Ros, G. C. Katsimiga, P. G. Kevrekidis, B. Prinari, G. Biondini, P. Schmelcher
Summary: This work extends earlier findings on the creation of dark soliton trains in single-component BECs to two-component BECs, and obtains analytical expressions for the DB soliton solutions produced by a general initial configuration. It is found that the size of the initial box and the amount of filling directly affect the number, size, and velocity of the solitons, while the initial phase determines the parity of the solutions.
Article
Optics
Frederic Hummel, Kevin Keiler, Peter Schmelcher
Summary: This study investigates the quantum dynamics of ultra-long-range trilobite molecules under homogeneous electric fields, deriving an analytic expression for the adiabatic electronic potential energy surface. Utilizing the multiconfigurational Hartree method, the molecular quantum dynamics are explored, revealing opportunities for controlling molecular configurations, such as adjusting bond lengths through periodic changes in electric field strength. Intrawell and interwell oscillations, as well as angular oscillations and rotations of probability densities, are observed depending on the initial wave packet.
