Testing Higher-Order Quantum Interference with Many-Particle States

Pleinert MO, Rueda Sanchez AR, Lutz E, von Zanthier J (2021)


Publication Type: Journal article

Publication year: 2021

Journal

Book Volume: 126

Article Number: 190401

Issue: 19

DOI: 10.1103/PhysRevLett.126.190401

Abstract

Quantum theory permits interference between indistinguishable paths but, at the same time, restricts its order. Single-particle interference, for instance, is limited to the second order, that is, to pairs of single-particle paths. To date, all experimental efforts to search for higher-order interferences beyond those compatible with quantum mechanics have been based on such single-particle schemes. However, quantum physics is not bound to single-particle interference. We here experimentally study many-particle higher-order interference using a two-photon-five-slit setup. We observe nonzero two-particle interference up to fourth order, corresponding to the interference of two distinct two-particle paths. We further show that fifth-order interference is restricted to 10−3 in the intensity-correlation regime and to 10−2 in the photon-correlation regime, thus providing novel bounds on higher-order quantum interference.

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How to cite

APA:

Pleinert, M.-O., Rueda Sanchez, A.R., Lutz, E., & von Zanthier, J. (2021). Testing Higher-Order Quantum Interference with Many-Particle States. Physical Review Letters, 126. https://doi.org/10.1103/PhysRevLett.126.190401

MLA:

Pleinert, Marc-Oliver, et al. "Testing Higher-Order Quantum Interference with Many-Particle States." Physical Review Letters 126 (2021).

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