Mixture of multiple copies of maximally entangled states is quasipure
Journal Article
·
· Physical Review. A
- Zhejiang Institute of Modern Physics and Department of Physics, Zhejiang University, Hangzhou 310027 (China)
Employing the general bilateral controlled-NOT operation and local state discrimination, the mixed state of the form {rho}{sub d}{sup (k)}=(1/d{sup 2}){sigma}{sub m,n=0}{sup d-1}(vertical bar {phi}{sub mn}><{phi}{sub mn} vertical bar){sup xk} is proved to be quasipure, where {l_brace} vertical bar {phi}{sub mn}>{r_brace} is the canonical set of mutually orthogonal maximally entangled states in dxd. Therefore irreversibility does not occur in the process of distillation for this family of states. Also, the distillable entanglement is calculated explicitly.
- OSTI ID:
- 20640791
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 69; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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