Optimal Axis Compensation in Quantum Key Distribution Protocols over Unital Channels
arXiv:0904.4083 · doi:10.1016/j.tcs.2014.09.020
Abstract
The axis compensation is a procedure in which the sender and the receiver compensate the axes of their transmitter and detector so that the bit sequence can be transmitted more reliably. We show the optimal axis compensations maximizing the key generation rate for unital channels. We consider the case in which only Bob is allowed to compensate his axis, and the case in which both Alice and Bob are allowed to compensate their axes. In the former case, we show that we should utilize the mismatched measurement outcomes in the channel estimation phase. In the latter case, we show that we do not have to utilize the mismatched measurement outcomes in the channel estimation phase.
24 pages, no figure, A part of this paper will be presented at 2009 IEEE International Symposium on Information Theory. The results in Section 2.3.2 is additionally shown in this paper
References in corpus (5)
- Reference frame independent quantum key distribution
- Full polarization control for fiber optical quantum communication systems using polarization encoding
- Experimental polarization encoded quantum key distribution over optical fibres with real-time continuous birefringence compensation
- Proof-of-Concept of Real-World Quantum Key Distribution with Quantum Frames
- Tomography increases key rates of quantum-key-distribution protocols