Squeezing-enhanced phase-shift-keyed binary communication in noisy channels
arXiv:1710.09577 · doi:10.1103/PhysRevA.97.032315
Abstract
We address binary phase-shift-keyed communication channels based on Gaussian states and prove that squeezing improves state discrimination at fixed energy of the channel, also in the presence of phase diffusion. We then assess performances of homodyne detection against the ultimate quantum limits to discrimination, and show that homodyning achieves optimality in large noise regime. Finally, we consider noise in the preparation of the seed signal (before phase encoding) and show that also in this case squeezing may improve state discrimination in realistic conditions.
6 pages, 5 figures
References in corpus (10)
- Experimental Quantum State Tomography of Optical Fields and Ultrafast Statistical Sampling
- Practical challenges in quantum key distribution
- Quantum-limited measurements of optical signals from a geostationary satellite
- Full characterization of Gaussian bipartite entangled states by a single homodyne detector
- Displacement receiver for phase-shift-keyed coherent states
- QPSK coherent state discrimination via a hybrid receiver
- Quantum receivers with squeezing and photon-number-resolving detectors
- Homodyne-like detection for state-discrimination in the presence of phase noise
- Symmetric M-ary phase discrimination using quantum-optical probe states
- Optical phase estimation via coherent state and displaced photon counting
Cited by in corpus (9)
- Optimized communication strategies with binary coherent states over phase noise channels
- Squeezing-enhanced communication without a phase reference
- Experimental quantum channel discrimination using metastable states of a trapped ion
- Optimal control of coherent light scattering for binary decision problems
- Phase tracking for sub-shot-noise-limited receivers
- Squeezing as a resource to counteract phase diffusion in optical phase estimation
- A robust hybrid receiver for binary phase-shift keying discrimination in the presence of phase noise
- Process estimation in qubit systems: a quantum decision theory approach
- Quantum Keyless Private Communication with Decoy States for Space Channels