Quantum communication with binary nonorthogonal pure states and single-shot measurements are discussed in terms of reliability function and cut-off rate. It is shown that some of different measurement strategies simultaneously attain the maximum single-shot cut-off rate. We also apply these measurements to the BPSK optical coherent states and compare them with the homodyne detection. Numerical results show that even including realistic imperfections, it is possible to exceed the homodyne limited cut-off rate.
- BPSK coherent signal
- Cut-off rate
- Minimum error discrimination
- Reliability function
- Unambiguous state discrimination
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics