Entanglement verification with detection-efficiency mismatch
arXiv:1609.03911 · doi:10.1103/PhysRevA.95.042319
Abstract
The security analysis of quantum key distribution is difficult to perform when there is efficiency mismatch between various threshold detectors involved in an experimental setup. Even the verification that the device actually performs in the quantum domain, referred to as the task of entanglement verification, is hard to perform. In this article we provide such an entanglement-verification method for characterized detection-efficiency mismatch. Our method does not rely on a cut-off of photon numbers in the optical signal. It can be applied independently of the degrees of freedom involved, thus covering, for example, efficiency mismatch in polarization and time-bin modes, but also in spatial modes. The evaluation of typical experimental scenarios suggests that an increase of detection-efficiency mismatch will drive the performance of a given setup out of the quantum domain.
22 pages, 18 figures
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- Security of quantum key distribution with detection-efficiency mismatch in the multiphoton case
- Quantum Key Distribution with Basis-Dependent Detection Probability
- High-dimensional quantum key distribution with resource-efficient detection
- Exploiting Faraday Rotation to Jam Quantum Key Distribution via Polarized Photons
- Phase error rate estimation in QKD with imperfect detectors
- State-Independent Quantum Key Distribution with Two-Way Classical Communication
- Imperfect detectors for adversarial tasks with applications to quantum key distribution
- Efficient simulation of noisy entanglement generation
- Security proofs for practical QKD: variations, techniques, gaps, and limitations