Quantum theory at the macroscopic scale

• URL: http://arxiv.org/abs/2409.03001v1
• Date: Wed, 4 Sep 2024 18:00:14 GMT
• Title: Quantum theory at the macroscopic scale
• Authors: Miguel Gallego, Borivoje Dakić,
• Abstract summary: We show that the behavior of a macroscopic system can retain all aspects of the quantum formalism. This departure from the expected classical description of macroscopic systems is not merely mathematical but also conceptual.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The quantum description of the microscopic world is incompatible with the classical description of the macroscopic world, both mathematically and conceptually. Nevertheless, it is generally accepted that classical mechanics emerges from quantum mechanics in the macroscopic limit. In this letter, we challenge this perspective and demonstrate that the behavior of a macroscopic system can retain all aspects of the quantum formalism, in a way that is robust against decoherence, particle losses and coarse-grained (imprecise) measurements. This departure from the expected classical description of macroscopic systems is not merely mathematical but also conceptual, as we show by the explicit violation of a Bell inequality and a Leggett-Garg inequality.

Related papers

• Finite frequentism explains quantum probability [0.0]
  I show that frequentism can be extended in a natural way to a decoherent quantum history space. The Gibbs concept of an infinite ensemble of gases is replaced by the quantum state expressed as a superposition of a finite number of decohering microstates.
  arXiv  Detail & Related papers  (2024-04-19T15:37:02Z)
• Postulating the Unicity of the Macroscopic Physical World [0.0]
  We argue that the unicity of the macroscopic world is a fundamental postulate of physics, rather than an issue that must be mathematically justified or demonstrated. This is made possible by using general operator algebras to extend the mathematical description of the physical world towards macroscopic systems.
  arXiv  Detail & Related papers  (2023-10-09T19:21:36Z)
• Quantum statistical mechanics from a Bohmian perspective [0.0]
  We develop a general formulation of quantum statistical mechanics in terms of probability currents. We discuss how various notions of entropy, proper and improper mixtures, and thermodynamics are understood from the Bohmian perspective.
  arXiv  Detail & Related papers  (2023-08-21T06:39:10Z)
• Schr\"odinger cat states of a 16-microgram mechanical oscillator [54.35850218188371]
  The superposition principle is one of the most fundamental principles of quantum mechanics. Here we demonstrate the preparation of a mechanical resonator with an effective mass of 16.2 micrograms in Schr"odinger cat states of motion. We show control over the size and phase of the superposition and investigate the decoherence dynamics of these states.
  arXiv  Detail & Related papers  (2022-11-01T13:29:44Z)
• Quantum realism: axiomatization and quantification [77.34726150561087]
  We build an axiomatization for quantum realism -- a notion of realism compatible with quantum theory. We explicitly construct some classes of entropic quantifiers that are shown to satisfy almost all of the proposed axioms.
  arXiv  Detail & Related papers  (2021-10-10T18:08:42Z)
• Macroscopic limit of quantum systems [0.0]
  Classical physics is approached from quantum mechanics in the macroscopic limit. The emergence of a classical trajectory is followed for the average of an observable over a large set of independent microscopical systems. The laws can be recovered in all practical purposes, owing to the largeness of Avogadro's number.
  arXiv  Detail & Related papers  (2021-07-28T18:51:14Z)
• Macroscopic randomness for quantum entanglement generation [0.0]
  Quantum entanglement between two or more bipartite entities is a core concept in quantum information areas. This paper presents a pure classical method of on-demand entangled light-pair generation.
  arXiv  Detail & Related papers  (2021-03-04T07:58:49Z)
• Macro-to-micro quantum mapping and the emergence of nonlinearity [58.720142291102135]
  We show how to assign to a system a microscopic description that abides by all macroscopic constraints. As a by-product, we show how effective nonlinear dynamics can emerge from the linear quantum evolution.
  arXiv  Detail & Related papers  (2020-07-28T17:22:49Z)
• From a quantum theory to a classical one [117.44028458220427]
  We present and discuss a formal approach for describing the quantum to classical crossover. The method was originally introduced by L. Yaffe in 1982 for tackling large-$N$ quantum field theories.
  arXiv  Detail & Related papers  (2020-04-01T09:16:38Z)
• Entropic Uncertainty Relations and the Quantum-to-Classical transition [77.34726150561087]
  We aim to shed some light on the quantum-to-classical transition as seen through the analysis of uncertainty relations. We employ entropic uncertainty relations to show that it is only by the inclusion of imprecision in our model of macroscopic measurements that we can prepare a system with two simultaneously well-defined quantities.
  arXiv  Detail & Related papers  (2020-03-04T14:01:17Z)
• Quantum Mechanical description of Bell's experiment assumes Locality [91.3755431537592]
  Bell's experiment description assumes the (Quantum Mechanics-language equivalent of the classical) condition of Locality. This result is complementary to a recently published one demonstrating that non-Locality is necessary to describe said experiment. It is concluded that, within the framework of Quantum Mechanics, there is absolutely no reason to believe in the existence of non-Local effects.
  arXiv  Detail & Related papers  (2020-02-27T15:04:08Z)

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.