Indirect Measurement for Optimal Quantum Communication Enhanced by Binary Non-standard Coherent States
arXiv:2112.02312 · doi:10.1364/JOSAB.450647
Abstract
It is well known that the Helstrom bound can be improved by generalizing the form of a coherent state. Thus, designing a quantum measurement achieving the improved Helstrom bound is important for novel quantum communication. In the present article, we analytically show that the improved Helstrom bound can be achieved by a projective measurement composed of orthogonal non-standard Schrödinger cat states. Moreover, we numerically show that the improved Helstrom bound can be nearly achieved by an indirect measurement based on the Jaynes-Cummings model. As the Jaynes-Cummings model describes an interaction between a light and a two-level atom, we emphasize that the indirect measurement considered in this article has potential to be experimentally implemented.
11 pages, 3 Figures
References in corpus (4)
- Quantum state discrimination and its applications
- Discrimination of the binary coherent signal: Gaussian-operation limit and simple non-Gaussian near-optimal receivers
- Displacement receiver for phase-shift-keyed coherent states
- Optimal state discrimination with a fixed rate of inconclusive results: Analytical solutions and relation to state discrimination with a fixed error rate