In search of multipath interference using large molecules

Joseph P. Cotter*, Christian Brand, Christian Knobloch, Yigal Lilach, Ori Cheshnovsky, Markus Arndt

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The superposition principle is fundamental to the quantum description of both light and matter. Recently, a number of experiments have sought to directly test this principle using coherent light, single photons, and nuclear spin states.We extend these experiments to massive particles for the first time. We compare the interference patterns arising from a beam of large dye molecules diffracting at single, double, and triple slit material masks to place limits on any highorder, ormultipath, contributions. We observe an upper bound of less than one particle in a hundred deviating from the expectations of quantum mechanics over a broad range of transverse momenta and de Broglie wavelength.

Original languageEnglish
Article numbere1602478
JournalScience advances
Issue number8
StatePublished - Aug 2017


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