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a graphic showing a chip with an array of rings that guides light and turns one color of light into many

What's Happening at JQI

With Passive Approach, New Chips Reliably Unlock Color Conversion

Researchers at JQI have designed and tested new chips that reliably convert one color of light into a trio of hues. Remarkably, the chips all work without any active inputs or painstaking optimization—a major improvement over previous methods.

Read the Story "With Passive Approach, New Chips Reliably Unlock Color Conversion"

We conduct curiosity-driven research that explores the most basic building blocks of nature with an eye toward potential applications in information science and technology.  

News

  • A man in a collared shirt stands in front of lab equipment and many hanging cables.

    Returning JQI Fellow Named New Director of National Quantum Laboratory

    December 2, 2025
  • Four squares in a row with the top half blue and bottom half yellow. In the leftmost the interface is smooth. The next interface is two smooth curves. The next interface is two mushroom cloud shapes. The final has no clear interface and shows random swirls and islands of yellow in the blue.

    When Superfluids Collide, Physicists Find a Mix of Old and New

    November 18, 2025
  • Three portraits of men done with simple black lines and brown shadows.

    Nobel Prize Celebrates Superconducting Circuits Bringing Quantum Quirks to Macroscopic World

    October 15, 2025
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Events

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Our Research

  • Many-Body Physics

    Some of the most intriguing physics happens when individual particles team up, giving rise to emergent collective properties.

    Learn More about Many-Body Physics
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    Quantum Information and Computing

    JQI physicists are investigating promising quantum computing architectures as well as developing methods to control quantum effects that can be exploited to process information in new ways.

    Learn More about Quantum Information and Computing
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    Quantum Measurement and Control

    Creating quantum states on demand and controlling them is a critical component to developing practical quantum-based devices.

    Learn More about Quantum Measurement and Control

Latest Publications

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The central theme of my research is to apply tools from quantum science to the studies of molecular structures and chemical reactions. To this end, becoming a member of JQI, one of the world's leading quantum centers, is highly valuable for my research program. Conversely, I hope to leverage my interdisciplinary background in both AMO physics and physical chemistry to help foster synergy between quantum and chemical sciences at UMD.

Portrait of Yu Liu
Yu Liu
Assistant Professor

Outreach & Education

JQI Fellows, postdocs, and students actively engage our community and the broader public in science.

About Our Programs & Activites
PFC-supported parametric downconversion demo at the 2016 USASEF. Credit: C. Cesare/JQI
PFC-supported parametric downconversion USASEF demo. Credit: C. Cesare/JQI

Want to Become a Part of Our Team?

The Joint Quantum Institute offers research opportunities for undergraduate students, graduate students and postdoctoral researchers. JQI is located on campus at the University of Maryland, College Park, but researchers may work at NIST or the UMD campus. 

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