Stern-Gerlach interferometry with the atom chip

Mark Keil, Shimon Machluf, Yair Margalit, Zhifan Zhou, Omer Amit, Or Dobkowski, Yonathan Japha, Samuel Moukouri, Daniel Rohrlich, Zina Binstock, Yaniv Bar-Haim, Menachem Givon, David Groswasser, Yigal Meir, Ron Folman

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

6 Scopus citations


In this invited review in honor of 100 years since the Stern-Gerlach (SG) experiments, we describe a decade of SG interferometry on the atom chip. The SG effect has been a paradigm of quantum mechanics throughout the last century, but there has been surprisingly little evidence that the original scheme, with freely propagating atoms exposed to gradients from macroscopic magnets, is a fully coherent quantum process. Specifically, no full-loop SG interferometer (SGI) has been realized with the scheme as envisioned decades ago. Furthermore, several theoretical studies have explained why it is a formidable challenge. Here we provide a review of our SG experiments over the last decade. We describe several novel configurations such as that giving rise to the first SG spatial interference fringes, and the first full-loop SGI realization. These devices are based on highly accurate magnetic fields, originating from an atom chip, that ensure coherent operation within strict constraints described by previous theoretical analyses. Achieving this high level of control over magnetic gradients is expected to facilitate technological applications such as probing of surfaces and currents, as well as metrology. Fundamental applications include the probing of the foundations of quantum theory, gravity, and the interface of quantum mechanics and gravity. We end with an outlook describing possible future experiments.

Original languageEnglish
Title of host publicationMolecular Beams in Physics and Chemistry
Subtitle of host publicationFrom Otto Stern's Pioneering Exploits to Present-Day Feat
EditorsBretislav Friedrich, Horst Schmidt-Böcking
Place of PublicationCham
PublisherSpringer International Publishing
Number of pages39
ISBN (Electronic)9783030639631
ISBN (Print)9783030639624
StatePublished - 20 Jun 2021

ASJC Scopus subject areas

  • Physics and Astronomy (all)


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