Article
Materials Science, Multidisciplinary
Ruipeng Li, Jonas von Milczewski, Atac Imamoglu, Rafal Oldziejewski, Richard Schmidt
Summary: We study induced pairing between two identical fermions mediated by an attractively interacting quantum impurity in two-dimensional systems. Based on a stochastic variational method (SVM), we investigate the influence of confinement and finite interaction range on the ground state of the quantum three-body problem. We find that confinement and a finite interaction range can enhance trimer stability and overcome Coulomb repulsion, opening possibilities for electron pairing beyond conventional paradigms.
Article
Physics, Multidisciplinary
M. Senay
Summary: We study the thermo-statistical properties of ideal Fermi gases under the effect of generalized uncertainty principle (GUP) at high and low temperatures. By considering the logarithm of the grand partition function, we obtain the total number of particles, internal energy, entropy, and heat capacity under the GUP. For high temperatures, we calculate the first three virial coefficients by obtaining a virial expansion of the system's equation of state. For low temperatures, we derive the susceptibility for Pauli paramagnetism using the chemical potential of the system.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2023)
Article
Optics
Raul Bombin, Viktor Cikojevic, Juan Sanchez-Baena, Jordi Boronat
Summary: This study focuses on the repulsive Fermi polaron in a two-component, two-dimensional system of fermionic atoms, investigating properties such as polaron energy, quasiparticle residue, and effective mass using the diffusion Monte Carlo method. The results highlight the importance of considering the effective range and scattering length to reproduce experimental results, as well as the establishment of universality through different model potentials for the interaction between the Fermi sea and the impurity. This underscores the significance of quantum fluctuations and beyond mean-field effects in accurately describing the Fermi polaron problem.
Article
Physics, Multidisciplinary
Ye Cao, Jing Zhou
Summary: The study of the polaron of an open quantum system is important for verifying the effectiveness of many-body theory and predicting novel quantum phenomena. In this work, the molecular state and spectrum functions of polarons in different dissipation ranges and loss rates are determined through analytical research. The results show how the molecular and polaron states respond to increasing dissipation range.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Mechanics
Won Sang Chung, Hassan Hassanabadi, Bekir Can Lutfuoglu
Summary: This paper examines the grand partition function of an alpha-boson gas, discussing thermodynamic laws, condensation, critical temperature, and alpha-deformed virial expansion. By computing the critical temperature for a cubic container, the study shows that the onset of alpha-boson condensation depends on the shape of the container.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2021)
Article
Physics, Multidisciplinary
K. Roux, V Helson, H. Konishi, J. P. Brantut
Summary: This paper reports the fast production and weakly destructive detection of a Fermi gas with tunable interactions in a high finesse cavity. The cavity is used to create an optical dipole trap and to reach the strong light-matter coupling regime, allowing for the observation of slow atom-number variations and the study of strongly correlated quantum matter.
NEW JOURNAL OF PHYSICS
(2021)
Article
Mathematics, Applied
Sasha A. Zaldivar, Hernando Quevedo
Summary: This article derives the fundamental thermodynamic equation for Fermi-Dirac and Bose-Einstein quantum gases, incorporating the quantum nature of the gas particles. The equation is then analyzed in the context of geometrothermodynamics. It is shown that the curvature of the equilibrium space, although lacking classical thermodynamic interaction, serves as a measure of effective quantum interaction between the gas particles. The curvature singularity in the equilibrium space corresponds to a first-order phase transition in Bose-Einstein condensation.
JOURNAL OF GEOMETRY AND PHYSICS
(2023)
Article
Optics
Taira Kawamura, Ryo Hanai, Yoji Ohashi
Summary: We develop a theory to describe the dynamics of a driven-dissipative many-body Fermi system and propose a method to realize exotic quantum states through reservoir engineering. By designing the shape of a Fermi surface and properly attaching multiple reservoirs with different chemical potentials, we demonstrate the potential of achieving unconventional states in nonequilibrium steady states.
Letter
Mechanics
Mahdieh Mohammadi, Maniya Maleki, Adam Wysocki, M. Reza Shaebani
Summary: The study found that radially driven fluid-immersed particles in a novel Hele-Shaw cell with open boundaries form a striped pattern within a specific range of horizontal oscillation frequencies and for sufficiently large amplitudes. The initial coarsening dynamics of the stripes gradually slows down and reaches a steady state after a few minutes. The distance between the stripes in the steady state exhibits an exponentially saturating increase with increased oscillation amplitude or frequency, while the width of the stripes decreases as a power-law with the frequency, and its amplitude dependence follows a logistic function. The study proposes a mechanism based on the interplay between shear stress, hydrodynamic interactions, and frictional forces to link the structural characteristics of the stripes to the properties of the oscillatory external drive.
Article
Physics, Multidisciplinary
Bugra Tuzemen, Tomasz Zawislak, Gabriel Wlazlowski, Piotr Magierski
Summary: We investigate the properties of spin-imbalanced ultracold Fermi gas at low temperatures over a wide range of spin polarizations. We employ microscopic calculations using mean-field and density functional theory approaches without any symmetry constraints. At low polarization values, the system is predicted to consist of multiple spin-polarized droplets. As the polarization increases, the system self-organizes into disordered structures resembling liquid crystals and can energetically compete with ordered structures like grid-like domain walls. Further increasing polarization leads to the development of regularities that can be considered as supersolid, where periodic density modulation and pairing correlations coexist. The robustness of the results has been verified against temperature effects, dimensionality, and the presence of a trapping potential. Dynamical stability has also been investigated.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Martin Lemoine
Summary: This Letter provides a concrete implementation of Fermi's model of particle acceleration in magnetohydrodynamic (MHD) turbulence, connecting the rate of energization to the gradients of the velocity of magnetic field lines, which it characterizes within a multifractal picture of turbulence intermittency. It then derives a transport equation in momentum space for the distribution function. This description is shown to be substantiated by a large-scale numerical simulation of strong MHD turbulence. The present general framework can be used to model particle acceleration in a variety of environments.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Fang Li, Shujin Deng, Liang Zhang, Jiahui Xia, Licheng Yi, Haibin Wu
Summary: Patterns resulting from modulation instability have been extensively studied in optics and Bose-Einstein condensates, but not yet in ultracold Fermi gases. Experimental observation of space-time patterns in a superfluid Fermi gas excited by red-detuned laser light reveals different types of patterns induced by longitudinally spatially fluctuated laser beams. Patterns in strongly interacting Fermi gases accompanied by phonon excitations demonstrate a striking X-type dispersion relation, while patterns in noninteracting Fermi gases are stationary without phonon excitations and have a longer lifetime.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2021)
Article
Physics, Mathematical
Zahra Ebadi, Hosein Mohammadzadeh
Summary: This paper explores the thermodynamic geometry of harmonic trapped Bose and Fermi gases, including thermodynamic geometry, metric tensor, and thermodynamic curvature. By observing that the thermodynamic curvature of the trapped Bose (Fermi) gas is always positive (negative), it is concluded that the trapping potential does not affect the intrinsic statistical interactions. By examining the singular points of the thermodynamic curvature, it is argued that the confinement dimension and the frequency of the trapping potential change the critical value of fugacity for the Bose gas.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Rui Song, Ping Zhang, Ning Hao
Summary: A recent experiment reported evidence of one-dimensional Majorana modes trapped by the crystalline domain walls in FeSe0.45Te0.55. First-principle calculations showed that iron atoms in the domain walls spontaneously formed a ferromagnetic order, which imposed a pi phase difference between the domain-wall-separated surface superconducting regions. This topological surface superconducting state can give rise to one-dimensional Majorana modes trapped by the wall. Furthermore, the researchers proposed a surface junction that can be used to create and fuse Majorana zero modes through controlling the width or magnetization of the interior ferromagnetic barrier, enabling braiding and readout of the Majorana zero modes.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
SangEun Han, Yong Baek Kim
Summary: This work investigates the emergence of an exotic non-Fermi liquid in two dimensions, where fermions with quadratic band-touching dispersion interact with a Bose metal. The extended infrared singularity of the Bose metal leads to a line of interacting fixed points of an exotic non-Fermi liquid, where the anomalous dimension of the fermions varies continuously. The generalization of the model with multiple low-energy excitations explores other unusual features of the resulting ground state.
Article
Engineering, Electrical & Electronic
Ziang Chen, Nan Du, Mahdi Kiani, Xianyue Zhao, Ilona Skorupa, Stefan E. Schulz, Danilo Buerger, Massimiliano Di Ventra, Ilia Polian, Heidemarie Schmidt
Summary: In this research, a high-security level hardware primitive system is developed using a novel electroforming-free analog memristive device. The system utilizes the power conversion efficiency generated at different resistance states of the memristor, achieving a significant frequency enhancement by studying the influence of input voltage sources. The encoded data from the physically implemented system shows high randomness distribution and security level through various statistical tests.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2022)
Article
Chemistry, Physical
Junzhang Ma, Simin Nie, Xin Gui, Muntaser Naamneh, Jasmin Jandke, Chuanying Xi, Jinglei Zhang, Tian Shang, Yimin Xiong, Itzik Kapon, Neeraj Kumar, Yona Soh, Daniel Gosalbez-Martinez, Oleg Yazyev, Wenhui Fan, Hannes Huebener, Umberto De Giovannini, Nicholas Clark Plumb, Milan Radovic, Michael Andreas Sentef, Weiwei Xie, Zhijun Wang, Christopher Mudry, Markus Mueller, Ming Shi
Summary: Using angle-resolved photoemission spectroscopy, the authors detected mobile bound states of excitons in quasi-one-dimensional metallic TaSe3, providing evidence for the elusive exciton mobility in metals.
Article
Physics, Applied
Ariel Norambuena, Felipe Torres, Massimiliano Di Ventra, Raul Coto
Summary: The article introduces a polariton-based quantum memristor, where the memristive nature is controlled by a time-varying atom-cavity detuning. The dynamical hysteresis and plasticity of the quantum memristor make it versatile for various applications.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Yan Ru Pei, Massimiliano Di Ventra
Summary: Spin glasses are difficult to study due to their non-convex landscapes, but a new non-equilibrium approach using classical dynamics with memory allows for efficient exploration of their low-temperature phases.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Massimiliano Di Ventra, Yuriy Pershin, Chih-Chun Chien
Summary: This article presents the discovery of a custodial symmetry in a classical electrical circuit with memory and explores the interplay between symmetry and memory. The topology edge state in the circuit is still protected by the custodial chiral symmetry, despite the explicit breaking of chiral symmetry caused by memory. These predictions can be verified experimentally.
PHYSICAL REVIEW LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Yuriy V. Pershin, Jinsun Kim, Timir Datta, Massimiliano Di Ventra
Summary: This study validates a recent test method and applies it to a device claimed to be a memristor. The results demonstrate that the device is actually an inductor with memory, not a memristor. This finding raises doubts about the existence and easy creation of ideal memristors.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Physics, Multidisciplinary
Nils Niggemann, Yasir Iqbal, Johannes Reuther
Summary: This article investigates fracton phases in quantum spin liquids, assesses the impact of quantum fluctuations on their characteristic features, and finds that quantum fluctuations modify the shape of these features, indicating possible fragility of these phases.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jiajun Li, Markus Muller, Aaram J. Kim, Andreas M. Lauchli, Philipp Werner
Summary: Recent advances in ultrafast pump-probe spectroscopy have allowed the exploration of hidden phases of correlated matter, including light-induced superconducting states. A new type of chiral superconducting phase has been induced in frustrated Mott insulators through photodoping, forming a condensate of doublons and holons. This metastable phase features a spatially varying order parameter with a 120 degrees phase twist, breaking time-reversal and inversion symmetry. The presented results demonstrate the chiral nature of the light-induced superconducting state and its distinguishing properties, which can be observed in pump-probe experiments.
Article
Optics
Keita Omiya, Markus Muller
Summary: We study the nature of the ergodicity-breaking quantum many-body scar states in the PXP model and reveal a common structure that gives rise to these states. We provide an extension of the PXP model that can host exact quantum scars and show that existing scar-stabilizing extensions can be understood within this framework. The exact scar states are obtained as large spin states of explicitly constructed pseudospins, and the quasiperiodic motion is shown to be the projection of the large pseudospin's precession onto the Rydberg-constrained subspace.
Article
Materials Science, Multidisciplinary
Sasank Budaraju, Yasir Iqbal, Federico Becca, Didier Poilblanc
Summary: The parton approach for quantum spin liquids provides a transparent description of low-energy elementary excitations, such as spinons and emergent gauge-field fluctuations. By modifying the gauge fields in the spinon kinematics, we analyze the effect and construct low-energy monopole excitations, which are shown to be gapless in the thermodynamic limit. Our results support the coexistence of gapless spinons with gapless monopole excitations.
Proceedings Paper
Engineering, Electrical & Electronic
Massimiliano Di Ventra
Summary: Quantum computing utilizes quantum phenomena for information processing and is considered the future of computing, but faces challenges in practical realization. MemComputing, on the other hand, employs non-quantum dynamical systems and time non-locality for computation, making it efficient to emulate in software and easier to transition to hardware.
2022 IEEE 22ND INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (NANO)
(2022)
Article
Optics
Yuan -Hang Zhang, Massimiliano Di Ventra
Summary: This study proposes a training method that utilizes the modes of the neural network distribution to provide global information, significantly improving the quality of reconstructed quantum states. This method is applicable to other types of neural networks and has the potential to efficiently tackle previously unmanageable problems.
Article
Materials Science, Multidisciplinary
A. Beckert, M. Grimm, R. Hermans, J. R. Freeman, E. H. Linfield, A. G. Davies, M. Muller, H. Sigg, S. Gerber, G. Matmon, G. Aeppli
Summary: The crystal field energy levels and magnetic moments of the insulating rare-earth magnet LiY1-xHoxF4 were investigated, including the hyperfine corrections, and the far-infrared, low-temperature refractive index of the material was determined.
Article
Physics, Multidisciplinary
Dominik Kiese, Tobias Mueller, Yasir Iqbal, Ronny Thomale, Simon Trebst
Summary: Renormalization group methods are mature tools for investigating the low-energy properties of correlated quantum many-body systems. Functional renormalization group continuously evolves a microscopic model action to an effective low-energy action via a functional flow equation, and approximation schemes are used for computation. In this paper, we implement the multiloop FRG method in the pseudofermion functional renormalization group framework for interacting quantum spin systems and discuss the complexities of the flow equations and refinements to the integration scheme. Benchmarking is done by analyzing antiferromagnetic Heisenberg models on different lattice types and comparing with existing results. These methodological refinements improve the numerical tool of choice for exploring frustrated quantum magnetism in higher dimensions.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Max Hering, Vincent Noculak, Francesco Ferrari, Yasir Iqbal, Johannes Reuther
Summary: In this study, we investigate the ground-state properties of the spin-1/2 pyrochlore Heisenberg antiferromagnet using pseudofermion functional renormalization group techniques. Our results indicate a tendency for lattice symmetry breaking in the ground state, and the recently proposed monopole state shows the strongest support among all spin liquid ansatze that we have tested.