• Corpus ID: 118509592

Past quantum state analysis of the photon number evolution in a cavity

@article{Rybarczyk2014PastQS,
  title={Past quantum state analysis of the photon number evolution in a cavity},
  author={Th{\'e}o Rybarczyk and Stefan Gerlich and Bruno Peaudecerf and Mariane Penasa and Brian Julsgaard and Klaus Moelmer and S. Gleyzes and M. Brune and Jean-Michel Raimond and Serge Haroche and Igor Dotsenko},
  journal={arXiv: Quantum Physics},
  year={2014}
}
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… 

Figures from this paper

Measurement back action and feedback in superconducting circuits
This thesis presents a series of experiments highlighting measurement back action and decoherence in a basic open quantum system, the superconducting qubit. These observations are enabled by recent
CQED quantum tomography of a microwave range
The protocol of measurement the probability density of a rotated quadrature of microwave mode in an arbitrary quantum state is presented and numerically investigated. The protocol is adapted to the
Correlation functions and conditioned quantum dynamics in photodetection theory
Correlations in photodetection signals from quantum light sources are conventionally calculated by application of the source master equation and the quantum regression theorem. In this article we
Exact quantum Bayesian rule for qubit measurements in circuit QED
TLDR
This work presents a rigorous and analytic solution for the effective quantum trajectory equation (QTE) after polaron transformation and converted to the form of Stratonovich calculus, and finds that the solution is a generalization of the elegant quantum Bayesian approach developed in arXiv:1111.4016.
Weak Values as Interference Phenomena
Weak values arise experimentally as conditioned averages of weak (noisy) observable measurements that minimally disturb an initial quantum state, and also as dynamical variables for reduced quantum
Fe b 20 15 Weak Values are Interference Phenomena
Weak values arise experimentally as conditioned averages of weak (noisy) observable measurements that minimally disturb an initial quantum state, and also as dynamical variables for reduced quantum
A smoothing theory for open quantum systems: The least mean square approach
  • Kentaro Ohki
  • Mathematics
    2015 54th IEEE Conference on Decision and Control (CDC)
  • 2015
TLDR
The least mean square estimate of quantum physical quantity composes from symmetric part and skew part, and the recursive equations, respectively, are developed.
Mesures continues en mécanique quantique : quelques résultats et applications
Cette these est consacree a l'etude des trajectoires quantiques issues de la theorie des mesures continues en mecanique quantique non relativiste. On y presente de nouveaux resultats theoriques ainsi
Estimation d'état et de paramètres pour les systèmes quantiques ouverts
La communaute scientifique a reussi ces dernieres annees a bâtir des systemes quantiques simples sur lesquels des series de mesures sont acquises successivement le long de trajectoires quantiques et
...
...

References

SHOWING 1-7 OF 7 REFERENCES
Phys
  • Rev. Lett. 111, 160401
  • 2013
Quantum Measurement
Exploring the Quantum
Phys
  • Rev. Lett. 112, 180402
  • 2014
Phys
  • Rev. A 89, 043839
  • 2014
A 24
  • 2315
  • 1991
Phys
  • Rev. A 65, 032111
  • 2002