Orbital angular momentum spectrum and entanglement in a rotating accelerated reference frame

• URL: http://arxiv.org/abs/2402.11486v2
• Date: Tue, 7 May 2024 00:24:46 GMT
• Title: Orbital angular momentum spectrum and entanglement in a rotating accelerated reference frame
• Authors: Haorong Wu, Xilong Fan, Lixiang Chen,
• Abstract summary: Quantum field theory shows that from the perspective of a linearly accelerated observer, an inertial empty space may be full of thermal particles. Here, we examine the OAM spectrum in a rotating accelerated reference frame to see how the spectrum differs from the linear accelerated case. To understand how a rotating accelerated observer actually perceives these particles, the Unruh-DeWitt detector and its detailed balance are studied.
• Score: 0.20482269513546458
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The particle definition varies across different theories. The quantum field theory in curved spacetime shows that from the perspective of a linearly accelerated observer, an inertial empty space may be full of thermal particles. This effect is known as the Unruh effect. When the degrees of freedom of orbital angular momentum (OAM) are considered, all OAM modes share the same expected particle number. Here, we examine the OAM spectrum in a rotating accelerated reference frame to see how the spectrum differs from the linear accelerated case. When the observer starts to rotate, not all OAM modes are allowed and some negative energy modes show up. To understand how a rotating accelerated observer actually perceives these particles, the Unruh-DeWitt detector and its detailed balance are studied. This relation is studied both in the comoving inertial frame and in the rest frame. Based on these results, the OAM entanglement degradation is explored in two-dimensional and high-dimensional cases, respectively. The results indicate that the entanglement dimension and the highest order of OAM modes are mainly related to the acceleration and the rotation, respectively. It is then demonstrated that these results can be generalized to all stationary trajectories.

Related papers

• Conserved spin operator of Dirac's theory in spatially flat FLRW spacetimes [0.0]
  New conserved spin and angular momentum operators of Dirac's theory on spatially flat FLRW spacetimes are proposed. The one-particle spin and orbital angular momentum operators have the same form in any FLRW spacetime regardless their concrete geometries.
  arXiv  Detail & Related papers  (2023-08-10T15:02:52Z)
• Controlled excitation of rotons in superfluid helium with an optical centrifuge [77.34726150561087]
  We show that the orientation of the angular momentum transferred from the laser field to the rotons, is dictated by the centrifuge. The observed decay of the coherent Raman signal suggests that the decoherence is governed by the scattering on thermal rotons and phonons.
  arXiv  Detail & Related papers  (2023-06-02T23:30:03Z)
• The Enigma of Orbital Angular Momentum of Spatiotemporal Vortex Pulses [0.0]
  Two recent works claimed the transverse orbital momentum (OAM) carried by optical pulses differs by a factor of 2 for STVPs. Here we show that the result by Hancock et al. is correct for the total OAM, while the result by Bliokh describes the intrinsic part of the OAM. We describe similar peculiarities of acoustic and quantum-relativistic (Klein-Gordon and arbitrary-spin) STVPs.
  arXiv  Detail & Related papers  (2022-09-09T16:09:35Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Quantum particle across Grushin singularity [77.34726150561087]
  We study the phenomenon of transmission across the singularity that separates the two half-cylinders. All the local realisations of the free (Laplace-Beltrami) quantum Hamiltonian are examined as non-equivalent protocols of transmission/reflection. This allows to comprehend the distinguished status of the so-called bridging' transmission protocol previously identified in the literature.
  arXiv  Detail & Related papers  (2020-11-27T12:53:23Z)
• Relativistic bands in the discrete spectrum of created particles in an oscillating cavity [0.0]
  We investigate the dynamical Casimir effect for a one-dimensional resonant cavity, with one mirror. We study the discrete spectrum of created particles in a region of frequencies above the oscillation frequency of the mirror.
  arXiv  Detail & Related papers  (2020-08-18T22:11:36Z)
• Zitterbewegung of massless particles [91.3755431537592]
  Zitterbewegung of massless particles with an arbitrary spin is analyzed in various representations. Zitterbewegung takes place in any representation except for the Foldy-Wouthuysen one.
  arXiv  Detail & Related papers  (2020-08-12T14:16:44Z)
• Quantum time dilation in atomic spectra [62.997667081978825]
  We demonstrate how quantum time dilation manifests in a spontaneous emission process. The resulting emission rate differs when compared to the emission rate of an atom prepared in a mixture of momentum wave packets. We argue that spectroscopic experiments offer a technologically feasible platform to explore the effects of quantum time dilation.
  arXiv  Detail & Related papers  (2020-06-17T18:03:38Z)
• The mirror at the edge of the universe: Reflections on an accelerated boundary correspondence with de Sitter cosmology [0.0]
  An accelerated boundary correspondence (ABC) is solved for the de Sitter moving mirror cosmology. The beta Bogoliubov coefficients reveal the particle spectrum is a Planck distribution with temperature inversely proportional to horizon radius.
  arXiv  Detail & Related papers  (2020-05-08T04:34:36Z)
• Generating multi-partite entanglement from the quantum vacuum with a finite-lifetime mirror [0.0]
  We find that inertial observers in the Minkowski vacuum detect particles along the half null-rays at the beginning and end of the mirror's lifetime. These particle distributions exhibit multi-partite entanglement, which reveals novel structure within the vacuum correlations. The interaction is modelled using a non-perturbative circuit model and does not suffer from energy divergences.
  arXiv  Detail & Related papers  (2020-04-15T13:57:15Z)
• Atom-interferometric test of the universality of gravitational redshift and free fall [48.82541018696971]
  Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. We present a specific geometry which together with state transitions leads to a scheme that is sensitive to both violations of the universality of free fall and gravitational redshift.
  arXiv  Detail & Related papers  (2020-01-27T13:35:30Z)

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.