Past quantum state analysis of the photon number evolution in a cavity
Quantum Physics
2014-09-04 v1
Abstract
A quantum system can be monitored through repeated interactions with meters, followed by their detection. The state of the system at time t is thus conditioned on the information obtained until that time. More insight in the state dynamics is provided, however, by the past quantum state (PQS) [S. Gammelmark et al. Phys. Rev. Lett. 111, 160401 (2013)]. It relies on all aspects of the system evolution which are recorded in the past and in the future of t. Using PQS analysis for the quantum non-demolition photon number counting in a cavity, we can reveal information hidden in the standard approach and resolve a wider range of number states. This experiment demonstrates the strong potential of PQS analysis.
Keywords
Cite
@article{arxiv.1409.0958,
title = {Past quantum state analysis of the photon number evolution in a cavity},
author = {Théo Rybarczyk and Stefan Gerlich and Bruno Peaudecerf and Mariane Penasa and Brian Julsgaard and Klaus Moelmer and Sébastien Gleyzes and Michel Brune and Jean-Michel Raimond and Serge Haroche and Igor Dotsenko},
journal= {arXiv preprint arXiv:1409.0958},
year = {2014}
}