Author:
Zhang Jin-Hua,Zhang Fu-Lin,Liang Mai-Lin,Wang Zhi-Xi,Fei Shao-Ming
Abstract
Abstract
Quantum state discrimination is an important part of quantum information processing. We investigate the discrimination of coherent states through a 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 the 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 costs.
Funder
National Natural Science Foundation of China
Beijing Natural Science Foundation
Shanxi Education Department Fund
Subject
Physics and Astronomy (miscellaneous)
Cited by
1 articles.
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