Process Tomography of Field Damping and Measurement of Fock State Lifetimes by Quantum Nondemolition Photon Counting in a Cavity

被引：73

作者：

Brune, M. ^{[1
]}

Bernu, J. ^{[1
]}

Guerlin, C. ^{[1
]}

Deleglise, S. ^{[1
]}

Sayrin, C. ^{[1
]}

Gleyzes, S. ^{[1
]}

Kuhr, S. ^{[1
]}

Dotsenko, I. ^{[2
]}

Raimond, J. M. ^{[1
]}

Haroche, S. ^{[1
,2
]}

机构：

[1] Univ P&M Crurie, CNRS, Ecole Normale Super, Lab Kastler Brossel, F-75231 Paris 05, France

[2] Coll France, F-75231 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 24期

基金：

日本科学技术振兴机构;

关键词：

Tomography; -; Photons;

D O I：

10.1103/PhysRevLett.101.240402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 <= n <= 7) are found to increase linearly with n. The results are in excellent agreement with theory including a small thermal contribution.

引用

页数：4

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