PT对称Bell态的经典纠缠与CPT纠缠

Classical Entanglement and CPT Entanglement of PT Symmetric Bell States

研究4个宇称-时间(PT)对称Bell态在经典Hermite条件下的纠缠问题.结果表明:在4个PT对称Bell态中,Φ_-〉和Ψ_-〉仍为经典量子态,且在经典量子Hermite内积下仍为最大纠缠态;Φ_+〉和Ψ_+〉不再总是经典量子态,将其在Hermite内积下进行规范化后的经典量子态也不再总是Hermite内积下的最大纠缠态.

We studied the classical entanglement problem of four parity-time（PT）symmetric Bell states under Hermitian conditions.The results show that among the four PT symmetric Bell states,Φ-〉and Ψ-〉are still classical quantum states,and are still maximally entangled states under Hermitian inner product;whereas Φ＋〉and Ψ＋〉are no longer always classical quantum states,and the classical quantum states normalized by Hermitian inner product are no longer always maximally entangled states under Hermitian inner product.