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Available
Atomic Physics Seminar
Monday, August 29, 2022
4:00 PM
Chemistry Building, Room 206

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RESERVED
Atomic Physics Seminar
Monday, September 12, 2022
4:00 PM
Chemistry Building, Room 206

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Available
Atomic Physics Seminar
Monday, September 19, 2022
4:00 PM
Chemistry Building, Room 206

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Available
Atomic Physics Seminar
Monday, September 26, 2022
4:00 PM
Chemistry Building, Room 206

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Atomic Physics Seminar
Monday, October 10, 2022
4:00 PM
Chemistry Building, Room 206

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Atomic Physics Seminar
Monday, October 24, 2022
4:00 PM
Chemistry Building, Room 206

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Atomic Physics Seminar
Monday, October 31, 2022
4:00 PM
Chemistry Building, Room 206

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"Moving Beyond Scalar Quantum Sensing with Cold-Atom Interferometers"


Brynle Barrett , University of New Brunswick
[Host: Cass Sackett]
ABSTRACT:

Robust and accurate acceleration tracking remains a challenge in many fields. For geophysics and economic geology, precise gravity mapping requires onboard sensors combined with accurate positioning and navigation systems. Cold-atom-based quantum inertial sensors can provide such high-precision instruments. However, current scalar instruments require precise alignment with vector quantities such as gravity. This presents a significant challenge in mobile environments. In recent work, we realized the first “vectorial” quantum accelerometer by combining three orthogonal atom interferometer measurements with a classical accelerometer triad. We demonstrate acceleration vector tracking with a 50-fold improvement in stability compared to our navigation-grade classical accelerometers. In this talk, I will give an overview of our vectorial quantum sensor and discuss future work moving beyond scalar quantum sensing.

Atomic Physics Seminar
Monday, November 7, 2022
4:00 PM
Chemistry Building, Room 206

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Atomic Physics Seminar
Monday, November 14, 2022
4:00 PM
Chemistry Building, Room 206

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"Building and Characterizing an Atom Interferometer Gyroscope"


Marybeth Beydler
[Host: Prof. Peter Schauss]
ABSTRACT:

Inertial Navigation Systems (INS) are alternatives to GPS that operate using linear accelerometers and gyroscopes to calculate the user’s position, orientation, and velocity using no external reference. Optical Sagnac gyroscopes are part of modern day INS and are limited by their ability to measure small rotations as they need a very large enclosed area. The Bragg Interferometer Gyroscope in a Time Orbiting Potential Trap (BIGTOP) is a rotation detector using a Bose-Einstein Condensate (BEC) to execute two Sagnac interferometers in a magnetic trap. BIGTOP is an improvement upon a previous iteration of a dual Sagnac interferometer which demonstrated rotation sensing. We have achieved atom interferometry with BIGTOP and reached a Sagnac area of 8 mm2 using multiple orbits, an improvement by a factor of 16. Additionally, we have taken our first large dataset over the course of 24 hours, which can be used to analyze the stability of our system. In tandem with BIGTOP, we have also worked to characterize and operate a compact atom chip interferometer system built by Cold Quanta (CQsystem). We report BIGTOP results, progress with the CQ system, and future work.

Atomic Physics Seminar
Monday, November 21, 2022
4:00 PM
Chemistry Building , Room 206

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Atomic Physics Seminar
Monday, November 28, 2022
4:00 PM
Chemistry Building, Room 206

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RESERVED
Atomic Physics Seminar
Monday, December 5, 2022
4:00 PM
Chemistry Building, Room 206

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To add a speaker, send an email to ps5nw@Virginia.EDU Include the seminar type (e.g. Atomic Physics Seminars), date, name of the speaker, title of talk, and an abstract (if available). [Please send a copy of the email to phys-speakers@Virginia.EDU.]