Freiburg 2019 – scientific programme
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FM: Fall Meeting
FM 30: Quantum Sensing: Applications I
FM 30.4: Talk
Tuesday, September 24, 2019, 15:00–15:15, Aula
The photonic Bose–Einstein condensate as a precision quantum sensor — •Stefan Yoshi Buhmann1,2 and Robert Bennett1,2 — 1University of Freiburg, Germany — 2Freiburg Institute for Advanced Studies (FRIAS), Germany
Photonic Bose–Einstein condensates have recently been realised as a new quantum state of light. Here, the photons inside a driven dye-filled cavity macroscopically occupy the ground state. We demonstrate that this extreme selectivity of the ground state can be exploited to construct a quantum sensor for the intra-cavity medium.
We propose to monitor the polarisation degree of freedom of the photonic Bose–Einstein condensate signal emerging from the cavity [2]. When introducing anisotropic or chiral molecules into the cavity, this polarisation will be governed by the handedness or the orientation of these molecules, respectively. In this way, enantiomeric excess or molecular anisotropy can be monitored in real time with unprecedented precision [3].
- [1] J. Klaers, J. Schmitt, F. Vewinger, M. Weitz, Nature 468, 545 (2010).
- [2] R. I. Moodie, P. Kirton, J. Keeling, Phys. Rev. A 96, 043844 (2017).
- [3] R. Bennett, Y. Gorbachev, S. Y. Buhmann, preprint arXiv:1905.07590 (2019).