17-22 July 2022
Royal Conservatory of Music, Toronto
America/Toronto timezone

New Perspectives on Quantum Transition Times: The Tunneling Flight Time

18 Jul 2022, 17:00
1h 30m
Hart House (Hart House)

Hart House

Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Precision measurement and tests of fundamental physics Poster session

Speaker

Tom Rivlin (Weizmann Institute of Science)

Description

Recent experimental and theoretical works have reignited long-standing debates over the time taken for certain quantum transitions, such as tunneling, to occur. This is important, as tunneling is a common quantum phenomenon in molecular systems where nonadiabatic couplings are significant, and certain simulation methods struggle to accommodate its effects. Here we propose a new type of quantum mechanical flight time, based on weak-averaging, and show the conditions under which it becomes equal to another measure known as the phase time. We compare these results to recent Larmor time experiments for tunneling, and show that the Larmor time and dwell time coincide under the same circumstances as the new flight time and the phase time. Finally, we discuss ongoing work to evaluate flight times in two-level systems with strong nonadiabatic couplings emulating certain electronic transitions, and show the effects nonadiabatic couplings have on tunneling times.

Presenter name Tom Rivlin

Primary author

Tom Rivlin (Weizmann Institute of Science)

Presentation Materials

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