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Title: Higher-order interference between multiple quantum particles interacting nonlinearly
Authors: Rozema, Lee A.
Zhuo, Zhao
Paterek, Tomasz
Dakić, Borivoje
Keywords: Science::Physics
Issue Date: 2021
Source: Rozema, L. A., Zhuo, Z., Paterek, T. & Dakić, B. (2021). Higher-order interference between multiple quantum particles interacting nonlinearly. Physical Review A, 103(5), 052204-.
Journal: Physical Review A
Abstract: The double-slit experiment is the most direct demonstration of interference between individual quantum objects. Since similar experiments with single particles and more slits produce interference fringes reducible to a combination of double-slit patterns, it is usually argued that quantum interference occurs between pairs of trajectories, compactly denoted as second-order interference. Here we show that quantum mechanics in fact allows for interference of arbitrarily high order. This occurs naturally when one considers multiple quantum objects interacting in the presence of a nonlinearity, both of which are required to observe higher-order interference. We make this clear by treating a generalized multislit interferometer using second quantization. We then present explicit experimentally relevant examples both with photons interacting in nonlinear media and an interfering Bose-Einstein condensate with particle-particle interactions. These examples are all perfectly described by quantum theory, and yet exhibit higher-order interference based on multiple particles interacting nonlinearly.
ISSN: 2469-9926
DOI: 10.1103/PhysRevA.103.052204
Rights: © 2021 American Physical Society (APS). All rights reserved. This paper was published in Physical Review A and is made available with permission of American Physical Society (APS).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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