Quantum optical weak measurements can visualize photon dynamics in real time

Details Quantum optical weak measurements can visualize photon dynamics in real time Quantum optical weak measurements can visualize photon dynamics in real time

2000-12-13

arxiv.org/abs/quant-ph/0012060v2

Physics

Quantum Physics

4 pages revtex, replacement with revised version to appear in Phys. Rev. A. We now take into account the finite lifetime of th

Scientific paper

An experiment is proposed to visualize stroboscopically in real time the dynamics of a photon oscillating between two cavities. The visualization is implemented by a sequence of weak measurements (POVM), which are carried out by probing one of the cavities with a Rydberg atom and detecting a resulting phase shift by Ramsey interferometry. This way to measure the number of photons in a cavity was experimentally realized by Brune et al.. We suggest a feedback mechanism which minimizes the disturbance due to the measurement and enables a detection of the original evolution of the radiation field. PACS numbers: 03.65.Ta, 32.80.-t, 03.67.-a

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