Stochastic Schrödinger equation for a non-Markovian dissipative qubit-qutrit system
Center for Controlled Quantum Systems, and the Department of Physics and Engineering Physics Stevens Institute of Technology - Hoboken, NJ 07030, USA
2 Department of Physics, Shanghai University - Shanghai 200444, China
Accepted: 23 September 2011
We investigate the non-Markovian quantum dynamics of a hybrid open system consisting of one qubit and one qutrit by employing a stochastic Schrödinger equation to generate diffusive quantum trajectories. We have established an exact quantum state diffusion (QSD) equation for the dissipative qubit-qutrit system coupled to a bosonic heat bath at zero temperature. As an important application, the non-Markovian QSD equation is employed to simulate the entanglement decay and generation measured by negativity. Finally, some steady-state properties of the hybrid system are also discussed.
PACS: 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 03.65.Yz – Decoherence; open systems; quantum statistical methods / 05.30.-d – Quantum statistical mechanics
© EPLA, 2011