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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Process tomography of field damping and measurement of fock state lifetimes by quantum nondemolition photon counting in a cavity

Brune, M. and Bernu, J. and Guerlin, C. and Deleglise, S. and Sayrin, C. and Gleyzes, S. and Kuhr, S. and Dotsenko, I. and Raimond, J. M. and Haroche, S. (2008) Process tomography of field damping and measurement of fock state lifetimes by quantum nondemolition photon counting in a cavity. Physical Review Letters, 101 (24). ISSN 0031-9007

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Abstract

The relaxation of a quantum field stored in a high-Q superconducting cavity is monitored by nonresonant Rydberg atoms. The field, subjected to repetitive quantum nondemolition photon counting, undergoes jumps between photon number states. We select ensembles of field realizations evolving from a given Fock state and reconstruct the subsequent evolution of their photon number distributions. We realize in this way a tomography of the photon number relaxation process yielding all the jump rates between Fock states. The damping rates of the n photon states (0