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Experimental schematic of an ultrathin optical fiber suspended over a superconducting microwave resonator.

Group Lead

Profile Photo of Steve Rolston

All Group Members

  • Profile photo of Hyok Sang Han

    Hyok Sang Han

    Assistant Research Scientist


  • Profile of Jonathan Hoffman

    Jonathan Hoffman

    Graduate Student

Recent News

  • A man in a hoodie and jacket stands in front of a snow-covered mountainous landscape.

    JQI Undergraduate Researcher Deven Bowman Named 2023 Goldwater Scholar

    April 4, 2023
  • Two (Photons) is Company, Three’s a Crowd

    April 26, 2021

    Photons—the quantum particles of light—normally don’t have any sense of personal space. A laser crams tons of photons into a tight beam, and they couldn’t care less that they are packed on top of each other. Two beams can even pass through each other without noticing. This is all well and good when making an extravagant laser light show or using a laser level to hang a picture frame straight, but for researchers looking to develop quantum technologies that require precise control over just one or two photons, this lack of interaction often makes life difficult. Now, a group of UMD researchers has come together to create tailored interactions between photons in an experiment where, at least for photons, two’s company but three’s a crowd. The technique builds on many previous experiments that use atoms as intermediaries to form connections between photons that are akin to the bonds between protons, electrons and other kinds of matter. These interactions, along with the ability to control them, promises new opportunities for researchers to study the physics of exotic interactions and develop light-based quantum technologies.

  • Remote Quantum Systems Produce Interfering Photons

    December 17, 2019

    Scientists at the Joint Quantum Institute (JQI) have observed, for the first time, interference between particles of light created using a trapped ion and a collection of neutral atoms. Their results could be an essential step toward the realization of a distributed network of quantum computers capable of processing information in novel ways.

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