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Perturbative algorithm for rotational decoherence

Carlesso, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1103/PhysRevA.103.032220
  3. Publisher: American Physical Society , 2021
  4. Abstract:
  5. Recent advances in levitated optomechanics provide new perspectives for the use of rotational degrees of freedom for the development of quantum technologies as well as for testing fundamental physics. As for the translational case, their use, especially in the quantum regime, is limited by environmental noises, the characterization of which is fundamental in order to assess, control, and minimize their effect, in particular decoherence. Here, we present a general perturbative approach to compute decoherence for a quantum system in a superposition of its rotational degrees of freedom. The specific cases of the dipole-dipole and quadrupole-quadrupole interactions are solved explicitly, and we show that the rotational degrees of freedom decohere on a time scale that can be longer than the translational one. © 2021 American Physical Society
  6. Keywords:
  7. Quantum theory ; Well testing ; Environmental noise ; Fundamental physics ; Perturbative approach ; Quadrupole interactions ; Quantum regimes ; Quantum system ; Quantum technologies ; Rotational degrees of freedom ; Degrees of freedom (mechanics)
  8. Source: Physical Review A ; Volume 103, Issue 3 , 2021 ; 24699926 (ISSN)
  9. URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.103.032220