Generalized form of optimal teleportation witnesses

0 Teleportation Criteria : Form and Significance

Our criteria for continuous variable quantum teleportation [T. take the form of sums, rather than products, of conjugate quadrature measurements of the signal transfer coefficients and the covariances between the input and output states. We discuss why they have this form. We also discuss the physical significance of the covariance inequality. Recently we have proposed criteria for the characte...

Generalized Bell States and Quantum Teleportation

We make a brief comment on measurement of quantum operators with degenerate eigenstates and apply to quantum teleportation. We also try extending the quantum teleportation by Bennett et al [5] to more general situation by making use of generalized Bell states. E-mail address : [email protected] Home-page : http://fujii.sci.yokohama-cu.ac.jp

The generalized Jacobson’s trace form

در این مقاله فرم رد جیکوبسن را به فرم‌های هرمیتی پادمتقارن روی جبرهای تقسیم کواترنیون با برگردان متعامد در مشخصه‌ی دلخواه تعمیم می‌دهیم. با استفاده از این فرم تعمیم‌یافته، یک رده‌‌بندی از فرم‌های هرمیتی مذکور ارائه می‌نمائیم. همچنین نشان می‌دهیم یک فرم هرمیتی ایزوتروپ (متابولیک) است اگر و تنها اگر فرم رد جیکوبسن تعمیم‌یافته‌ی آن ایزوتروپ (متابولیک) باشد. .

Optimal Teleportation Based on Bell Measurement

We study optimal teleportation based on the Bell measurements. An explicit expression for the quantum channel associated with the optimal teleportation with an arbitrary mixed state resource is presented. The optimal transmission fidelity of the corresponding quantum channel is calculated and shown to be related to the fully entangled fraction of the quantum resource, rather than the singlet fr...

Recurrent construction of optimal entanglement witnesses for 2N-qubit systems