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Area of Science:

  • Quantum physics
  • Cavity quantum electrodynamics

Background:

  • Rabi oscillations in two-level systems exhibit complex mesoscopic phenomena like collapses and revivals.
  • Superconducting microwave cavities offer a platform for exploring quantum dynamics.

Purpose of the Study:

  • To investigate Rabi oscillations in a mesoscopic regime using Rydberg atoms and a superconducting cavity.
  • To efficiently generate and characterize nonclassical cat states.

Main Methods:

  • Utilized slow circular Rydberg atoms interacting with a superconducting microwave cavity.
  • Explored a wide range of interaction times and photon numbers.
  • Measured Wigner function cuts to reveal quantum coherence.

Main Results:

  • Observed oscillation collapses and revivals in the mesoscopic regime.
  • Demonstrated efficient production of cat states with tens of photons.
  • Measured quantum coherence and fast decoherence of these states.

Conclusions:

  • The experiment provides insights into quantum dynamics at the mesoscopic scale.
  • Opens avenues for rapid generation and manipulation of nonclassical states in quantum electrodynamics systems.