Seminars

Seminars will be held in room S-141 in the Physics and Astronomy Department building on Mondays at 3:45 PM, unless noted otherwise.

October 27, 2025
Prof. Matt Jaffe
Montana State University
Optical cavities for quantum information science and precision gravity measurements
(Host: Ash Kumar)
Neutral atoms have emerged in recent years as a leading qubit candidate for quantum computing.  Atom interferometers, meanwhile, provide precise measurements of very weak gravitational forces. Both of these applications use optical fields to write-in / read-out information, as well as to trap and manipulate the atoms. Optical resonators have been used to enhance such atom-photon interactions, constituting the field of cavity quantum electrodynamics (QED).

In this talk, I will discuss two experiments being designed and built in our new lab at Montana State University. The first will develop and utilize novel high numerical aperture optical resonators enabling strong single-atom/single-photon coupling even at low to moderate finesse. I will describe use cases of these resonators with neutral atom qubits, such as Purcell-enhanced cavity tweezer arrays for fast readout, entanglement distribution and scalable trapping. The second experiment uses a more traditional cavity geometry to realize a compact, high-sensitivity mobile atomic gravimeter / gradiometer. Such an apparatus can be small enough to serve as a drone payload, with sufficient sensitivity to conduct relevant field surveys of gravitational signatures in geophysics, underground resource monitoring, and non-invasive archaeology.

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November 3, 2025
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November 10, 2025
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November 17, 2025
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November 24, 2025 (TG week)
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December 1, 2025
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December 8, 2025 (Classes end)
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December 15, 2025
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