Field Locked to a Fock State by Quantum Feedback with Single Photon Corrections
Abstract
Fock states with photon numbers n up to 7 are prepared on demand in a microwave superconducting cavity by a quantum feedback procedure that reverses decoherence-induced quantum jumps. Circular Rydberg atoms are used as quantum nondemolition sensors or as single-photon emitter or absorber actuators. The quantum nature of these actuators matches the correction of single-photon quantum jumps due to relaxation. The flexibility of this method is suited to the generation of arbitrary sequences of Fock states.
- Publication:
-
Physical Review Letters
- Pub Date:
- June 2012
- DOI:
- 10.1103/PhysRevLett.108.243602
- arXiv:
- arXiv:1203.1920
- Bibcode:
- 2012PhRvL.108x3602Z
- Keywords:
-
- 42.50.Pq;
- 03.67.Pp;
- 42.50.Dv;
- Cavity quantum electrodynamics;
- micromasers;
- Quantum error correction and other methods for protection against decoherence;
- Nonclassical states of the electromagnetic field including entangled photon states;
- quantum state engineering and measurements;
- Quantum Physics
- E-Print:
- 5 pages, 5 figures