Deterministic and probabilistic entanglement swapping of nonmaximally entangled states assisted by optimal quantum state discrimination
arXiv:1402.1244 · doi:10.1103/PhysRevA.89.012337
Abstract
We analyze entanglement swapping (ES) of partially entangled pure states with arbitrary Schmidt rank from the perspective of quantum state discrimination. It is shown that the standard deterministic ES protocol is related with an optimal minimum-error strategy. In this case the amount of entanglement of the states resulting from swapping is, in general, lower than the maximum achievable for the quantum channels involved. In this regard, we show that the ES protocol can be probabilistically improved resorting to optimal maximum-confidence (MC) discrimination strategy. Additionally, we show that the success probability of achieving entanglement above a prescribed value from standard deterministic ES can be increased by applying sequential MC measurements.
14 pages, 10 figures
References in corpus (11)
- Quantum Computing
- Entangling Independent Photons by Time Measurement
- Experimental delayed-choice entanglement swapping
- Maximum Confidence Quantum Measurements
- Multistage Entanglement Swapping
- High-fidelity entanglement swapping with fully independent sources
- Long-distance practical quantum key distribution by entanglement swapping
- Increasing singlet fraction with entanglement swapping
- Maximum-confidence discrimination among symmetric qudit states
- Quantum teleportation via maximum-confidence quantum measurements
- Optimized maximum-confidence discrimination of N mixed quantum states and application to symmetric states
Cited by in corpus (11)
- Experimental minimum-error quantum-state discrimination in high dimensions
- Experimental Multi-Party Sequential State Discrimination
- Experimental quantum state discrimination using the optimal fixed rate of inconclusive outcomes strategy
- Enhanced discrimination of high-dimensional quantum states by concatenated optimal measurement strategies
- Optimal probabilistic dense coding schemes
- Parametric separation of symmetric pure quantum states
- Coherence based on positive operator-valued measures for standard and concatenated quantum state discrimination with inconclusive results
- Experimental optimal discrimination of states of a qubit with fixed rates of inconclusive outcomes
- Training quantum measurement devices to discriminate unknown non-orthogonal quantum states
- Entanglement distribution in quantum networks via swapping of partially entangled pure states
- Unbounded entanglement-sustaining sequential local quantum state discrimination