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Q-Farm Quantum Seminar Series presents Entanglement Wedge Reconstruction and the Information Paradox - & - Large Momentum Transfer Clock Atom Interferometry

Topic: 
Entanglement Wedge Reconstruction and the Information Paradox | Large Momentum Transfer Clock Atom Interferometry
Wednesday, May 22, 2019 - 12:00pm
Venue: 
Physics/Astrophysics (Varian II) Building, Room 102/103
Speaker: 
Geoff Penington and TJ Wilkason (Stanford)
Abstract / Description: 

The Q-FARM seminar series is designed to bring together the various groups in the university interested in quantum science and engineering. Seminars take place every other Wednesday at lunch time, with two speakers per session giving short talks on their research. The primary goal of these seminars is to strengthen the community and increase collaboration. Theoretical and experimental talks are balanced so that the whole community may participate.


Entanglement Wedge Reconstruction and the Information Paradox, Geoff Penington

I will review the ideas of entanglement wedge reconstruction and holographic quantum error correction in AdS/CFT and show how they can be used to resolve the black hole information paradox.

Large Momentum Transfer Clock Atom Interferometry, TJ Wilkason

Atom interferometry is a promising candidate for future precision sensors with a diverse science impact, ranging from laboratory tests of general relativity and the equivalence principle, to searches for dark matter and detection of gravitational waves. I will present efforts towards increasing the sensitivity of atom interferometers through the use of narrow-line clock transitions in alkaline earth atoms such as strontium. These narrow-line transitions promise to circumvent existing constraints encountered in conventional atom interferometers, enabling increased space-time area through large momentum transfer (LMT) atom optics and reducing the sensitivity to laser phase noise. I will show recent results on LMT interferometry on the 689nm intercombination line of strontium, which demonstrate for the first time an LMT interferometer based on sequential single-photon transitions, a critical requirement for gravitational wave detection using clock atoms. We study spontaneous emission and other losses at large pulse area for this new type of atom interferometer and characterize the rejection of common laser phase noise in a gradiometer configuration.