Discrimination of Coherent States via Atom-Field Interaction without Rotation Wave Approximation
arXiv:2302.08073 · doi:10.1088/1572-9494/acbc6f
Abstract
The quantum state discrimination is an important part of quantum information processing. We investigate the discrimination of coherent states through Jaynes-Cummings (JC) model interaction between the field and the ancilla without rotation wave approximation (RWA). We show that the minimum failure probability can be reduced as RWA is eliminated from JC model and the non-RWA terms accompanied by the quantum effects of fields (e.g. the virtual photon process in the JC model without RWA) can enhance the state discrimination. The JC model without RWA for unambiguous state discrimination is superior to ambiguous state discrimination, particularly when the number of sequential measurements increases. Unambiguous state discrimination implemented via the non-RWA JC model is beneficial to saving resource cost.
8 pages, 4 figures
References in corpus (6)
- Observation of the Bloch-Siegert Shift in a Qubit-Oscillator System in the Ultrastrong Coupling Regime
- Discrimination of the binary coherent signal: Gaussian-operation limit and simple non-Gaussian near-optimal receivers
- Demonstration of near-Optimal Discrimination of Optical Coherent States
- Discrimination of binary coherent states using a homodyne detector and a photon number resolving detector
- A robust quantum receiver for phase shift keyed signals
- Unambiguous state discrimination with intrinsic coherence