Quantum corrections and multioccupancy in a semi-classical gas

• URL: http://arxiv.org/abs/2603.20703v1
• Date: Sat, 21 Mar 2026 08:00:43 GMT
• Title: Quantum corrections and multioccupancy in a semi-classical gas
• Abstract summary: The connection between $eta$ and the multioccupancy of quantum states is the aim of the present work.<n>By means of a chemical/physical approach it is possible to associate $eta$ to the concrete realization of multioccupancy in momentum space.<n>The pseudo-molecules result as casual consequences of multiple scattering processes among non interacting (scattering apart) particles.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: The quantum corrections to the behavior of a semi-classical gas can be expressed as a power series of the ratio $eta$ between the cube of De Broglie's thermal wavelength and the specific volume. The connection between $eta$ and the multioccupancy of quantum states is the aim of the present work. By means of a chemical/physical approach it is possible to associate $eta$ to the concrete realization of multioccupancy in momentum space, through the formation of what we call "pseudo-molecules", i.e. multiplets of particles sharing momenta whose differences are negligeable in the continuous spctrum approximation. The pseudo-molecules result as casual consequences of multiple scattering processes among non interacting (scattering apart) particles.

Related papers

• Quantum motility-induced phase separation [0.0]
  We show that quantum MIPS can occur in a model of active hard-core bosons in one dimension.<n>We find numerical evidence for restoring genuine phase separation with a divergent correlation length.<n>These results suggest that the coherence-activity interplay can generate new types of nonequilibrium quantum states.
  arXiv  Detail & Related papers  (2026-08-26T11:28:13Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Measurement phase transitions in the no-click limit as quantum phase transitions of a non-hermitean vacuum [77.34726150561087]
  We study phase transitions occurring in the stationary state of the dynamics of integrable many-body non-Hermitian Hamiltonians. We observe that the entanglement phase transitions occurring in the stationary state have the same nature as that occurring in the vacuum of the non-hermitian Hamiltonian.
  arXiv  Detail & Related papers  (2023-01-18T09:26:02Z)
• Dilute neutron star matter from neural-network quantum states [58.720142291102135]
  Low-density neutron matter is characterized by the formation of Cooper pairs and the onset of superfluidity. We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and reconfiguration techniques.
  arXiv  Detail & Related papers  (2022-12-08T17:55:25Z)
• Studying chirality imbalance with quantum algorithms [62.997667081978825]
  We employ the (1+1) dimensional Nambu-Jona-Lasinio (NJL) model to study the chiral phase structure and chirality charge density of strongly interacting matter. By performing the Quantum imaginary time evolution (QITE) algorithm, we simulate the (1+1) dimensional NJL model on the lattice at various temperature $T$ and chemical potentials $mu$, $mu_5$.
  arXiv  Detail & Related papers  (2022-10-06T17:12:33Z)
• Multiparticle quantum walk: a dynamical probe of topological many-body excitations [0.0]
  Recent experiments demonstrated that single-particle quantum walks can reveal the topological properties of single-particle states. We generalize this picture to the many-body realm by focusing on multiparticle quantum walks of strongly interacting fermions.
  arXiv  Detail & Related papers  (2022-09-08T05:32:31Z)
• Strongly dipolar gases in a one-dimensional lattice: Bloch oscillations and matter-wave localization [0.0]
  Adding a one-dimensional optical lattice creates a platform where quantum fluctuations are still unexplored. We employ Bloch oscillations as an interferometric tool to assess the role quantum fluctuations play in an array of quasi-two-dimensional Bose-Einstein condensates. Long-lived oscillations are observed when the chemical potential is balanced between sites, in a region where a macrodroplet is extended over several lattice sites.
  arXiv  Detail & Related papers  (2022-05-06T15:05:36Z)
• Finite phase coherence time of a bosonic quantum field at the Boltzmann equilibrium [0.0]
  A quantitative quantum field approach with non-local order parameters is presented for a very weakly interacting, dilute Bose gas. It is shown that both coherent oscillations, as well as decay times of quantum coherence for the forward and backward propagating components of the quantum field are defined by a unique time variable. A quantitative estimate for the unit time scale for time propagation of a particle in a very weakly interacting Bose gas is derived from the coherence time of the wave field.
  arXiv  Detail & Related papers  (2022-04-04T10:52:29Z)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• Evolution of a Non-Hermitian Quantum Single-Molecule Junction at Constant Temperature [62.997667081978825]
  We present a theory for describing non-Hermitian quantum systems embedded in constant-temperature environments. We find that the combined action of probability losses and thermal fluctuations assists quantum transport through the molecular junction.
  arXiv  Detail & Related papers  (2021-01-21T14:33:34Z)
• Solvable model of a generic driven mixture of trapped Bose-Einstein condensates and properties of a many-boson Floquet state at the limit of an infinite number of particles [0.0]
  A solvable model of a periodically-driven mixture of Bose-Einstein condensates is presented. The model generalizes the harmonic-interaction model for the time-dependent domain. We investigate the imprinting of momentum and its fluctuations when steering a Bose-Einstein condensate by an interacting bosonic impurity.
  arXiv  Detail & Related papers  (2020-10-29T15:01:59Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.