Entanglement production in nonideal cavities and optimal opacity

Article

关键词: MATRIX THEORY;    QUANTUM;    CONDUCTANCE;    SCATTERING;   

DOI  :  10.1103/PhysRevB.88.041301

来源: SCIE

【 摘 要 】

We compute analytically the distributions of concurrence C and squared norm N for the production of electronic entanglement in a chaotic quantum dot. The dot is connected to the external world via one ideal and one partially transparent lead, characterized by the opacity.. The average concurrence increases with. while the average squared norm of the entangled state decreases, making it less likely to be detected. When a minimal detectable norm N-0 is required, the average concurrence is maximal for an optimal value of the opacity gamma(star)(N-0) which is explicitly computed as a function of N-0. If N-0 is larger than the critical value N-0(star) similar or equal to 0.3693..., the average entanglement production is maximal for the completely ideal case, a direct consequence of an interesting bifurcation effect.

【 授权许可】

Free