[qoqms-meetings] FW: Next UniKORN Perspectives Seminar: Prof. Jack Harris

Mon Sep 14 10:40:47 BST 2020

From: UniKORN <unikorn.seminars at gmail.com>
Sent: 14 September 2020 10:40
To: Andrew Daley <andrew.daley at strath.ac.uk>
Subject: Next UniKORN Perspectives Seminar: Prof. Jack Harris

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Next UniKORN Perspectives Seminar
Prof. Jack Harris: Single phonon quantum acoustics with superfluid helium
The next UniKORN Perspectives Seminar will be given by Prof. Jack Harris this Wednesday. Please find the details of the talk below.

Time: 2pm BST
Date: Wednesday the 16th of September 2020
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Title: Single phonon quantum acoustics with superfluid helium

Abstract:
Quantum effects in acoustic degrees of freedom offer exciting opportunities in sensing, control, and information processing, as well as in studies of fundamental physics. To date, much progress in this field has been made with systems whose dynamics is essentially linear (this includes the realization of acoustic oscillators in their ground state or in squeezed states, and the observation of entanglement among acoustic and electromagnetic modes). However, these systems’ linearity precludes access to “stronger” quantum effects that would offer true performance enhancement and tests of quantum mechanics in new regimes. One route to realizing nonlinear quantum acoustics is based on the back-action of single photon detectors. In this talk, I will describe our use of this approach to detect and control individual phonons in a nanogram-scale body of superfluid helium. I will also described the future prospects of superfluid-based quantum acoustic systems.

[https://mcusercontent.com/e69cb9f9bd7fec3fdcc43243d/images/418c66d9-741b-4734-b241-53212ec67419.png]

Jack Harris is Professor of Physics and Applied Physics at Yale University, and is also a member of the Yale Quantum Institute. He received his undergraduate degree from Cornell University and his Ph.D. from UCSB, where he developed ultrasensitive micromechanical sensors and used them to study quantum Hall systems in the group of David Awschalom. He was a postdoctoral fellow at the Harvard/MIT Center for Ultracold Atoms, where he worked with John Doyle and Wolfgang Ketterle on a cryogenic atom-trapping experiment. Since joining the Yale faculty in 2004, his group has developed novel approaches to the field of quantum optomechanics, including the “membrane-in-the-middle” device, and various means for combining high-finesse optical cavities with superfluid helium.

Professor Harris studies the quantum aspects of motion in macroscopic objects that combine mechanical, optical, and superfluid components. His group’s experiments use ultrasensitive force detectors to measure quantum fluctuations of objects that are visible to the naked eye. These experiments are also used to study novel topological features in the dynamics of coupled oscillators.

--- From the Yale University website<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Foptomechanics.us10.list-manage.com%2Ftrack%2Fclick%3Fu%3De69cb9f9bd7fec3fdcc43243d%26id%3D7371deef26%26e%3Dee228784d0&data=02%7C01%7Candrew.daley%40strath.ac.uk%7Cf265b48a733b4befb00008d858921946%7C631e0763153347eba5cd0457bee5944e%7C0%7C0%7C637356731807520980&sdata=fuwiWbD3u%2FjECIdHs8d1fx5GdylIlW2JqH83wfyDyEo%3D&reserved=0>. Read more about their work on their group website<https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Foptomechanics.us10.list-manage.com%2Ftrack%2Fclick%3Fu%3De69cb9f9bd7fec3fdcc43243d%26id%3D3285db35bc%26e%3Dee228784d0&data=02%7C01%7Candrew.daley%40strath.ac.uk%7Cf265b48a733b4befb00008d858921946%7C631e0763153347eba5cd0457bee5944e%7C0%7C0%7C637356731807520980&sdata=yP1vaR3uoKwbbwhYshx%2BCxRUZcccYzjFqj%2BTXGeYK80%3D&reserved=0>.

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