National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [60878004]; Ministry of Education [200805110002]; National Basic Research Project of ChinaNational Basic Research Program of China [2005 CB724508]
机构署名：
本校为第一且通讯机构
院系归属：
物理科学与技术学院
摘要：
Multi-mode entanglement is investigated in a system composed of N coupled identical harmonic oscillators interacting with a common environment. We treat the problem generally by working with the Hamiltonian without the rotating-wave approximation and by considering the environment as a non-Markovian reservoir to the oscillators. We invoke an N-mode unitary transformation of the position and momentum operators and find that in the transformed basis the system is represented by a set of independent harmonic oscillators with only one of them coupled to the environment. Working in the Wigner repre...
