General theory of decoy-state quantum cryptography with source errors
arXiv:0802.3177 · doi:10.1103/PhysRevA.77.042311
Abstract
The existing theory of decoy-state quantum cryptography assumes the exact control of each states from Alice's source. Such exact control is impossible in practice. We develop the theory of decoy-state method so that it is unconditionally secure even there are state errors of sources, if the range of a few parameters in the states are known. This theory simplifies the practical implementation of the decoy-state quantum key distribution because the unconditional security can be achieved with a slightly shortened final key, even though the small errors of pulses are not corrected.
Our results can be used securely for any source of diagonal states, including the Plug-&-Play protocol with whatever error pattern, if we know the ranges of errors of a few parameters
References in corpus (10)
- Free-Space distribution of entanglement and single photons over 144 km
- Quantum information with Gaussian states
- Experimental Long-Distance Decoy-State Quantum Key Distribution Based On Polarization Encoding
- Long distance decoy state quantum key distribution in optical fiber
- Simple and efficient quantum key distribution with parametric down-conversion
- Passive decoy state quantum key distribution: Closing the gap to perfect sources
- Improved practical decoy state method in quantum key distribution with parametric down conversion source
- Quantum metrology at the Heisenberg limit with ion traps
- General theory for decoy-state quantum key distribution with arbitrary number of intensities
- Simple protocol for secure decoy-state quantum key distribution with a loosely controlled source