PROTOCOL FOR UNAMBIGUOUS QUANTUM STATE DISCRIMINATION USING QUANTUM COHERENCE

Kim, Sunho; Li, Longsuo; Kumar, Asutosh; Xiong, Chunhe; Das, Sreetama; Sen, Ujjwal; Pati, Arun kumar und Wu, Junde (2021): PROTOCOL FOR UNAMBIGUOUS QUANTUM STATE DISCRIMINATION USING QUANTUM COHERENCE. In: Quantum Information & Computation, Bd. 21, Nr. 11-12: S. 931-944

Abstract

Roa et al. showed that quantum state discrimination between two nonorthogonal quantum states does not require quantum entanglement but quantum dissonance only. We find that quantum coherence can also be utilized for unambiguous quantum state discrimination. We present a protocol and quantify the required coherence for this task. We discuss the optimal unambiguous quantum state discrimination strategy in some cases. In particular, our work illustrates an avenue to find the optimal strategy for discriminating two nonorthogonal quantum states by measuring quantum coherence.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 1533-7146
• Sprache: Englisch