Duality of quantum coherence and path distinguishability
By M. N. Bera, Tabish Qureshi, M. A. Siddiqui, A. Pati. 2015
217 citations recorded by the source corpus.
We derive a generalized wave-particle duality relation for arbitrary multipath quantum interference phenomena. Beyond the conventional notion of the wave nature of a quantum system, i.e., the interference fringe visibility, we introduce a quantifier as the normalized quantum coherence, recently defined in the framework of quantum information theory. To witness the particle nature, we quantify the path distinguishability or the which-path information based on unambiguous quantum state discrimination. Then, the Bohr complementarity principle for multipath quantum interference can be stated as a duality relation between the quantum coherence and the path distinguishability. For two-path interference, the quantum coherence is identical to the interference fringe visibility, and the relation reduces to the well-known complementarity relation. The duality relation continues to hold in the case where mixedness is introduced due to possible decoherence effects.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/4cc4b98711f5bb981190a2b9d18f15875734e701
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Quantum coherence and geometric quantum discord (2017, background): “Moreover, for the case of initially mixed particle state ρs = ∑ i ρi j|ψi〉〈ψ j| and pure detector state, or the more general case of both initially mixed particle and detector states, Bera et al. (2015) showed that the equality of Eq.”