Multipath wave-particle duality with a path detector in a quantum superposition

• URL: http://arxiv.org/abs/2010.15719v3
• Date: Mon, 22 Feb 2021 17:31:01 GMT
• Title: Multipath wave-particle duality with a path detector in a quantum superposition
• Authors: Mohd Asad Siddiqui and Tabish Qureshi
• Abstract summary: Some recent two-path interference experiments have devised methods where one can have a quantum superposition of the two choices. We show that a tight multipath wave-particle duality relation is respected in all such situations.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: According to Bohr's principle of complementarity, a quanton can behave either as a wave or a particle, depending on the choice of the experimental setup. Some recent two-path interference experiments have devised methods where one can have a quantum superposition of the two choices, thus indicating that a quanton may be in a superposition of wave and particle nature. These experiments have been of interest from the point of view of Wheeler's delayed-choice experiment. However, it has also been claimed that this experiment can violate complementarity. Here we theoretically analyze a multipath interference experiment that has a which-path detector in a quantum superposition of being present and absent. We show that a tight multipath wave-particle duality relation is respected in all such situations, and complementarity holds well. The apparent violation of complementarity may be due to incorrect evaluation of path distinguishability in such scenarios.

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