Mutual Preservation of Entanglement
| Autor: | Andrzej Veitia, Jun Jing, Chee Wei Wong, Ting Yu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Quantum Physics Cluster state FOS: Physical sciences General Physics and Astronomy Quantum entanglement Squashed entanglement 01 natural sciences Multipartite entanglement 010309 optics Superdense coding Quantum mechanics 0103 physical sciences W state Quantum Physics (quant-ph) 010306 general physics Quantum teleportation Entanglement witness |
| Popis: | We study a generalized double Jaynes-Cummings (JC) model where two entangled pairs of two-level atoms interact indirectly. We focus on the case where the cavities and the entangled pairs are uncorrelated. We show that there exist initial states of the qubit system so that two entangled pairs are available at all times. In particular, the minimum entanglement in the pairs as a function of the initial state is studied. Finally, we extend our findings to a model consisting of multi-mode atom-cavity interactions. We use a non-Markovian quantum state diffusion (QSD) equation to obtain the steady-state density matrix for the qubits. We show that the multi-mode model also displays dynamical preservation of entanglement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|