Vacuum radiation versus shortcuts to adiabaticity

• URL: http://arxiv.org/abs/2308.05241v1
• Date: Wed, 9 Aug 2023 21:58:10 GMT
• Title: Vacuum radiation versus shortcuts to adiabaticity
• Authors: Ricardo R. Ancheyta
• Abstract summary: We show how the counterdiabatic term of the transitionless tracking algorithm cancels out, exactly, the term responsible for the photon production in the dynamical Casimir effect. This result suggests that the energy of producing photons out of the vacuum is related to the energetic cost of the shortcut.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The nonadiabatic dynamic of the electromagnetic field triggers photons generation from the quantum vacuum. Shortcuts to adiabaticity, instead, are protocols that mimic the field's adiabatic dynamic in a finite time. Here, we show how the counterdiabatic term of the transitionless tracking algorithm cancels out, exactly, the term responsible for the photon production in the dynamical Casimir effect. This result suggests that the energy of producing photons out of the vacuum is related to the energetic cost of the shortcut. Furthermore, if the system operates under a quantum thermodynamic cycle, we confirm the equivalence between the adiabatic and nonadiabatic work outputs. Finally, our study reveals that identifying these unreported observations can only be possible using the so-called effective Hamiltonian approach.

Related papers

• QED Corrections in Unstable Vacuum [0.0]
  Self-energy and vacuum polarization effects in quantum electrodynamics are calculated for the supercritical Coulomb field. In this regime, the quantum vacuum becomes unstable, resulting in spontaneous electron-positron pair creation. We conjecture that the total probability of spontaneous pair creation could differ significantly from the predictions of Dirac theory.
  arXiv  Detail & Related papers  (2024-09-12T15:10:10Z)
• Generalized energy gap law: An open system dynamics approach to non-adiabatic phenomena in molecules [0.0]
  Non-adiabatic molecular phenomena govern the fate of virtually all photo-physical and photochemical processes. A simple and elegant description, the energy gap law, was derived five decades ago. We revisit and extend this theory to account for crucial aspects such as vibrational relaxation, dephasing, and radiative loss.
  arXiv  Detail & Related papers  (2024-05-14T15:59:58Z)
• Probing the symmetry breaking of a light--matter system by an ancillary qubit [50.591267188664666]
  Hybrid quantum systems in the ultrastrong, and even more in the deep-strong, coupling regimes can exhibit exotic physical phenomena. We experimentally observe the parity symmetry breaking of an ancillary Xmon artificial atom induced by the field of a lumped-element superconducting resonator. This result opens a way to experimentally explore the novel quantum-vacuum effects emerging in the deep-strong coupling regime.
  arXiv  Detail & Related papers  (2022-09-13T06:14:08Z)
• The quantum Otto cycle in a superconducting cavity in the non-adiabatic regime [62.997667081978825]
  We analyze the efficiency of the quantum Otto cycle applied to a superconducting cavity. It is shown that, in a non-adiabatic regime, the efficiency of the quantum cycle is affected by the dynamical Casimir effect.
  arXiv  Detail & Related papers  (2021-11-30T11:47:33Z)
• Dispersive readout of molecular spin qudits [68.8204255655161]
  We study the physics of a magnetic molecule described by a "giant" spin with multiple $d > 2$ spin states. We derive an expression for the output modes in the dispersive regime of operation. We find that the measurement of the cavity transmission allows to uniquely determine the spin state of the qudits.
  arXiv  Detail & Related papers  (2021-09-29T18:00:09Z)
• Photon-mediated interactions near a Dirac photonic crystal slab [68.8204255655161]
  We develop a theory of dipole radiation near photonic Dirac points in realistic structures. We find positions where the nature of the collective interactions change from being coherent to dissipative ones. Our results significantly improve the knowledge of Dirac light-matter interfaces.
  arXiv  Detail & Related papers  (2021-07-01T14:21:49Z)
• Quantum electrodynamics in anisotropic and tilted Dirac photonic lattices [0.0]
  We show how isotropic Dirac-photons can lead to non-exponential spontaneous emission as well as dissipation-less long-range emitter interactions. In particular, we show how by changing the anisotropy of the lattice one can change both the spatial shape of the interactions as well as its coherent/incoherent nature.
  arXiv  Detail & Related papers  (2021-06-20T19:55:30Z)
• Realizing an Unruh-DeWitt detector through electro-optic sampling of the electromagnetic vacuum [0.0]
  We present a new theoretical framework to describe the experimental advances in electro-optic detection of broadband quantum states. We discuss the specific working regime of such processes, and the consequences through characterization of the quantum light involved in the detection.
  arXiv  Detail & Related papers  (2021-03-26T10:04:07Z)
• Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic quantum walk [52.77024349608834]
  We realize a photonic quantum walk in the presence of a synthetic gauge field. We investigate intriguing system dynamics characterized by the interplay between Bloch oscillations and Landau-Zener transitions.
  arXiv  Detail & Related papers  (2020-11-11T16:35:41Z)
• Effective action for delta potentials: spacetime-dependent inhomogeneities and Casimir self-energy [0.0]
  We study the vacuum fluctuations of a quantum scalar field in the presence of a thin and inhomogeneous flat mirror, modeled with a delta potential. We show that the divergences can be absorbed into a local counterterm, and that the remaining finite part is in general a nonlocal functional of the inhomogeneities.
  arXiv  Detail & Related papers  (2020-10-21T16:59:33Z)
• Theory of waveguide-QED with moving emitters [68.8204255655161]
  We study a system composed by a waveguide and a moving quantum emitter in the single excitation subspace. We first characterize single-photon scattering off a single moving quantum emitter, showing both nonreciprocal transmission and recoil-induced reduction of the quantum emitter motional energy.
  arXiv  Detail & Related papers  (2020-03-20T12:14:10Z)

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.