Interferometric distillation and determination of unknown two-qubit entanglement
arXiv:1006.1484 · doi:10.1103/PhysRevA.79.052336
Abstract
We propose a scheme for both distilling and quantifying entanglement, applicable to individual copies of an arbitrary unknown two-qubit state. It is realized in a usual two-qubit interferometry with local filtering. Proper filtering operation for the maximal distillation of the state is achieved, by erasing single-qubit interference, and then the concurrence of the state is determined directly from the visibilities of two-qubit interference. We compare the scheme with full state tomography.
References in corpus (13)
- Entanglement of Formation of an Arbitrary State of Two Qubits
- Mixed State Entanglement and Quantum Error Correction
- Purification of Noisy Entanglement and Faithful Teleportation via Noisy Channels
- On the Measurement of Qubits
- Normal forms and entanglement measures for multipartite quantum states
- Entanglement versus Bell violations and their behaviour under local filtering operations
- Local filtering operations on two qubits
- An observable entanglement measure for unknown mixed quantum states
- Optimal teleportation with a mixed state of two qubits
- On experimental procedures for entanglement verification
- Optimal Entanglement Enhancement for Mixed States
- Experimental Entanglement Distillation of Two-qubit Mixed States Under Local filtering Operations
- Multiparticle Interference, GHZ Entanglement, and Full Counting Statistics