# The 27th International Conference on Atomic Physics

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

## Manipulating and measuring states of an optomechanical resonator in the quantum regime

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

### Hart House

#### Hart House

7 Hart House Cir, Toronto, ON M5S 3H3
Poster presentation Quantum optics and hybrid quantum systems

### Description

Macroscopic mechanical devices in the quantum regime can play a key role in quantum communication, quantum sensing and fundamental tests of quantum mechanics. We use a fiber cavity filled with superfluid $^4$He of mass ~ 1 ng as our mechanical resonator. Leveraging single photon counting techniques, we manipulate and probe the motional state of a superfluid $^4$He resonator. The arrival times of Stokes and anti-Stokes photons are used to measure the resonator’s phonon coherences. We demonstrate the coherences of a thermal state near the motional ground state, a non-classical photon-phonon squeezed state, and a high amplitude coherent state in this superfluid $^4$He resonator. These measurements pave the avenue of realizing a non-classical state in a milligram resonator in future experiments.

Presenter name Wang, Yiqi

### Primary authors

Yiqi Wang (Department of Applied Physics, Yale University) Yogesh Patil (Department of Physics, Yale University) Jiaxin Yu (Department of Applied Physics, Yale University) Jakob Reichel (Laboratoire Kastler Brossel, ENS-Université PSL) Jack Harris (Department of Physics, Yale University)

### Presentation Materials

There are no materials yet.