Quantum superpositions of Minkowski spacetime

• URL: http://arxiv.org/abs/2208.12083v2
• Date: Tue, 25 Oct 2022 02:36:24 GMT
• Title: Quantum superpositions of Minkowski spacetime
• Authors: Joshua Foo, Cemile Senem Arabaci, Magdalena Zych, and Robert B. Mann
• Abstract summary: "Spacetime superpositions" are quantum superpositions of different spacetimes not related by a global coordinate transformation. We consider the quantum-gravitational effects produced by superpositions of periodically identified Minkowski spacetime. We show that the detector's response exhibits discontinuous resonances at rational ratios of the superposed periodic length scale.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Within any anticipated unifying theory of quantum gravity, it should be meaningful to combine the fundamental notions of quantum superposition and spacetime to obtain so-called "spacetime superpositions": that is, quantum superpositions of different spacetimes not related by a global coordinate transformation. Here we consider the quantum-gravitational effects produced by superpositions of periodically identified Minkowski spacetime (i.e.\ Minkowski spacetime with a periodic boundary condition) with different characteristic lengths. By coupling relativistic quantum matter to fields on such a spacetime background (which we model using the Unruh-deWitt particle detector model), we are able to show how one can in-principle "measure" the field-theoretic effects produced by such a spacetime. We show that the detector's response exhibits discontinuous resonances at rational ratios of the superposed periodic length scale.

Related papers

• Generation of quantum entanglement in superposed diamond spacetime [2.3560462017582298]
  We present a framework for the superposition causal diamond spacetime and analyze the behavior of quantum entanglement influenced by the spacetime superposition. Our results suggest that the characteristics of spacetime superposition can serve as valuable resources for performing quantum information processing tasks.
  arXiv  Detail & Related papers  (2024-12-31T03:32:40Z)
• Note on the local calculation of decoherence of quantum superpositions in de Sitter spacetime [2.212209097253224]
  We study the decoherence effect of quantum superposition in de Sitter spacetime due to the presence of the cosmological horizon. We compute the entangling particle numbers in scalar field, electromagnetic field, and gravitational field scenarios.
  arXiv  Detail & Related papers  (2024-12-31T01:30:04Z)
• Looking for Carroll particles in two time spacetime [55.2480439325792]
  Carroll particles with a non-vanishing value of energy are described in the framework of two time physics. We construct the quantum theory of such a particle using an unexpected correspondence between our parametrization and that obtained by Bars for the hydrogen atom in 1999.
  arXiv  Detail & Related papers  (2023-10-29T15:51:41Z)
• Quantum conformal symmetries for spacetimes in superposition [0.0]
  We build an explicit quantum operator that can map states describing a quantum field on a superposition of spacetimes to states representing a quantum field with a superposition of masses on a Minkowski background. It can be used to import the phenomenon of particle production in curved spacetime to its conformally equivalent counterpart, thus revealing new features in modified Minkowski spacetime.
  arXiv  Detail & Related papers  (2022-06-30T18:00:02Z)
• Quantum dynamics corresponding to chaotic BKL scenario [62.997667081978825]
  Quantization smears the gravitational singularity avoiding its localization in the configuration space. Results suggest that the generic singularity of general relativity can be avoided at quantum level.
  arXiv  Detail & Related papers  (2022-04-24T13:32:45Z)
• Quantum time dilation in a gravitational field [39.58317527488534]
  We investigate how the superposition principle affects the gravitational time dilation observed by a simple clock. We show that the emission rate of an atom prepared in a coherent superposition of separated wave packets in a gravitational field is different from the emission rate of an atom in a classical mixture of these packets.
  arXiv  Detail & Related papers  (2022-04-22T10:02:21Z)
• Schr\"odinger's Black Hole Cat [0.0]
  We show how to describe such "spacetime superpositions" and explore effects they induce upon quantum matter. Our approach capitalizes on standard tools of quantum field theory in curved space.
  arXiv  Detail & Related papers  (2022-04-01T12:11:36Z)
• Time and Evolution in Quantum and Classical Cosmology [68.8204255655161]
  We show that it is neither necessary nor sufficient for the Poisson bracket between the time variable and the super-Hamiltonian to be equal to unity in all of the phase space. We also discuss the question of switching between different internal times as well as the Montevideo interpretation of quantum theory.
  arXiv  Detail & Related papers  (2021-07-02T09:17:55Z)
• Spacetime effects on wavepackets of coherent light [24.587462517914865]
  We introduce an operational way to distinguish between the overall shift in the pulse wavepacket and its genuine deformation after propagation. We then apply our technique to quantum states of photons that are coherent in the frequency degree of freedom. We find that the quantum coherence initially present can enhance the deformation induced by propagation in a curved background.
  arXiv  Detail & Related papers  (2021-06-23T14:20:19Z)
• Schr\"odinger's cat for de Sitter spacetime [0.0]
  We provide a new phenomenological description for the response of quantum probes on a spacetime manifold in quantum superpositions. Applying this approach to static de Sitter space, we discover scenarios in which the effects produced by the quantum spacetime are operationally indistinguishable from those induced by superpositions of Rindler trajectories in Minkowski spacetime. The distinguishability of such quantum spacetimes from superpositions of trajectories in flat space reduces to the equivalence or non-equivalence of the field correlations between the superposed amplitudes.
  arXiv  Detail & Related papers  (2020-12-18T02:54:35Z)
• Projection evolution and quantum spacetime [68.8204255655161]
  We discuss the problem of time in quantum mechanics. An idea of construction of a quantum spacetime as a special set of the allowed states is presented. An example of a structureless quantum Minkowski-like spacetime is also considered.
  arXiv  Detail & Related papers  (2019-10-24T14:54:11Z)

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.