Observing different quantum trajectories in cavity QED
Departamento de Física, Universidade Federal de Minas Gerais - Belo Horizonte, Caixa Postal 702, 30123-970, MG, Brazil
2 Centre for Quantum Technologies, National University of Singapore - 2 Science Drive 3, 117542 Singapore
3 Department of Quantum Science, Research School of Physics and Engineering, The Australian National University ACT 0200, Australia
Accepted: 29 April 2011
The experimental observation of quantum jumps is an example of single open quantum systems that, when monitored, evolve in terms of stochastic trajectories conditioned on measurements results. Here we present a proposal that allows the experimental observation of a much larger class of quantum trajectories in cavity QED systems. In the microwave regime, three-level atoms probe the cavity field while in the optical case the field probes atomic states. In the first situation the cavity field evolves stochastically between highly non-classical states while the second case allows for the monitoring of engineered thermal baths that are crucial for recent proposals for probing entanglement decay and also for entanglement protection.
PACS: 42.50.-p – Quantum optics / 42.50.Pq – Cavity quantum electrodynamics; micromasers / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps
© EPLA, 2011