Internal decoherence in nano-object interferometry due to phonons

C. Henkel, R. Folman

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We discuss the coherent splitting and recombining of a nanoparticle in a mesoscopic "closed-loop"Stern-Gerlach interferometer in which the observable is the spin of a single impurity embedded in the particle. This spin, when interacting with a pulsed magnetic gradient, generates the force on the particle. We calculate the internal decoherence, which arises as the displaced impurity excites internal degrees of freedom (phonons) that may provide WelcherWeg information and preclude interference. We estimate the constraints this decoherence channel puts on future interference experiments with massive objects. We find that for a wide range of masses, forces, and temperatures, phonons do not inhibit Stern-Gerlach interferometry with micro-scale objects. However, phonons do constitute a fundamental limit on the splitting of larger macroscopic objects if the applied force induces phonons.

Original languageEnglish
Article number025602
JournalAVS Quantum Science
Volume4
Issue number2
DOIs
StatePublished - 1 Jun 2022

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Computer Networks and Communications
  • Physical and Theoretical Chemistry
  • Computational Theory and Mathematics
  • Electrical and Electronic Engineering

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