Entanglement verification for quantum-key-distribution systems with an 
underlying bipartite qubit-mode structure

Rigas, J; Guhne, O; Lutkenhaus, N

doi:10.1103/PhysRevA.73.012341

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Entanglement verification for quantum-key-distribution systems with an underlying bipartite qubit-mode structure

MPS-Authors

/persons/resource/persons201118

Lutkenhaus, N
Max Planck Research Group, Max Planck Institute for the Science of Light, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Rigas, J., Guhne, O., & Lutkenhaus, N. (2006). Entanglement verification for quantum-key-distribution systems with an underlying bipartite qubit-mode structure. PHYSICAL REVIEW A, 73(1): 012341. doi:10.1103/PhysRevA.73.012341.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6DBE-8

Abstract

We consider entanglement detection for quantum-key-distribution systems that use two signal states and continuous-variable measurements. This problem can be formulated as a separability problem in a qubit-mode system. To verify entanglement, we introduce an object that combines the covariance matrix of the mode with the density matrix of the qubit. We derive necessary separability criteria for this scenario. These criteria can be readily evaluated using semidefinite programming and we apply them to the specific quantum key distribution protocol.