On the collective properties of quantum media

• URL: http://arxiv.org/abs/2209.06110v1
• Date: Mon, 12 Sep 2022 06:17:24 GMT
• Title: On the collective properties of quantum media
• Authors: Kamel Ourabah
• Abstract summary: We discuss the hydrodynamic representation of a wide class of quantum media exhibiting similar elementary excitations and dispersion properties. The representation covers quantum systems characterized by any type of (long-range) self-interaction, associated with an arbitrary potential. It also accounts for possible nonlinearities, which may arise e.g., due to short-range interactions (collisions) in the case of bosons, or from the Pauli exclusion principle for fermions.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We discuss the hydrodynamic representation of a wide class of quantum media exhibiting similar elementary excitations and dispersion properties. The representation covers quantum systems characterized by any type of (long-range) self-interaction, associated with an arbitrary potential. It also accounts for possible nonlinearities, which may arise e.g., due to short-range interactions (collisions) in the case of bosons, or from the Pauli exclusion principle for fermions. The approach equally applies to various physical scenarios, such as self-gravitating quantum media (e.g., dark matter), quantum plasmas, Bose-Einstein condensates, and non-condensed cold atomic clouds. We discuss the formal analogies that can be drawn between these different systems and how they can be used to realize laboratory experiments emulating gravitational phenomena, especially in the context of alternative theories of gravity. To substantiate our point, we elaborate more closely on the case of non-minimal matter-curvature coupling gravity theories.

Related papers

• A Theory of Quantum Jumps [44.99833362998488]
  We study fluorescence and the phenomenon of quantum jumps'' in idealized models of atoms coupled to the quantized electromagnetic field. Our results amount to a derivation of the fundamental randomness in the quantum-mechanical description of microscopic systems.
  arXiv  Detail & Related papers  (2024-04-16T11:00:46Z)
• Embezzling entanglement from quantum fields [41.94295877935867]
  Embezzlement of entanglement refers to the counterintuitive possibility of extracting entangled quantum states from a reference state of an auxiliary system. We uncover a deep connection between the operational task of embezzling entanglement and the mathematical classification of von Neumann algebras.
  arXiv  Detail & Related papers  (2024-01-14T13:58:32Z)
• Quantum field theory for multipolar composite bosons with mass defect and relativistic corrections [0.10686401485328585]
  We present a subspace effective field theory for interacting, spin carrying, and possibly charged ensembles of atoms composed of nucleus and electron. We obtain a relativistic coupling between the coboson's center-of-mass motion and internal structure encoded by the mass defect.
  arXiv  Detail & Related papers  (2023-07-12T12:35:27Z)
• Interaction-induced topological pumping in a solid-state quantum system [18.7657779101508]
  Inter-particle interaction can profoundly alter the band structure of quantum many-body systems. Here we demonstrate interaction-induced topological pumping in a solid-state quantum system comprising an array of 36 superconducting qubits.
  arXiv  Detail & Related papers  (2023-03-08T13:57:13Z)
• Strongly incoherent gravity [0.0]
  A non-entangling version of an arbitrary two-body potential $V(r)$ arises from local measurements and feedback forces. This produces a non-relativistic model of gravity with fundamental loss of unitarity. As an alternative to testing entanglement properties, we show that the entire remaining parameter space can be tested by looking for loss of quantum coherence in small systems.
  arXiv  Detail & Related papers  (2023-01-20T01:09:12Z)
• Quantum Instability [30.674987397533997]
  We show how a time-independent, finite-dimensional quantum system can give rise to a linear instability corresponding to that in the classical system. An unstable quantum system has a richer spectrum and a much longer recurrence time than a stable quantum system.
  arXiv  Detail & Related papers  (2022-08-05T19:53:46Z)
• Complementarity and causal propagation of decoherence by measurement in relativistic quantum field theories [0.0]
  We show that decoherence due to the presence of a detector propagates with the speed of light in terms of a retarded Green's function. The quantum nature of fields, such as quantum fluctuations or emission of gravitons expressed in terms of the Keldysh Green's function also play important roles in the mechanism of decoherence due to on-shell particle creation.
  arXiv  Detail & Related papers  (2022-05-17T14:37:43Z)
• Realizing a 1D topological gauge theory in an optically dressed BEC [0.0]
  Topological gauge theories describe the low-energy properties of strongly correlated quantum systems through effective weakly interacting models. In traditional solid-state platforms such gauge theories are only convenient theoretical constructions. We report the quantum simulation of a topological gauge theory by realizing a one-dimensional reduction of the Chern-Simons theory in a Bose-Einstein condensate.
  arXiv  Detail & Related papers  (2022-04-11T19:38:44Z)
• A no-go theorem on the nature of the gravitational field beyond quantum theory [0.0]
  Table-top experiments involving massive quantum systems have been proposed to test the interface of quantum theory and gravity. In particular, the crucial point of the debate is whether it is possible to conclude anything on the quantum nature of the gravitational field. We introduce the framework of Generalised Probabilistic Theories (GPTs) to study the nature of the gravitational field.
  arXiv  Detail & Related papers  (2020-12-02T19:00:03Z)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Quantum decoherence by Coulomb interaction [58.720142291102135]
  We present an experimental study of the Coulomb-induced decoherence of free electrons in a superposition state in a biprism electron interferometer close to a semiconducting and metallic surface. The results will enable the determination and minimization of specific decoherence channels in the design of novel quantum instruments.
  arXiv  Detail & Related papers  (2020-01-17T04:11:44Z)

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.