Observing and Evading Quantum Backaction in an Interferometer

Seminar
Speaker
Nir Kampel
Date
29/10/2014 - 14:00Add to Calendar 2014-10-29 14:00:00 2014-10-29 14:00:00 Observing and Evading Quantum Backaction in an Interferometer Observing and Evading Quantum Backaction in an Interferometer  N. S. Kampel, T. P. Purdy, P.-L. Yu, R. W. Peterson, and C. A. Regal The pursuit to eliminate classical noise sources in an interferometer has a long history. Only recently have experimental conditions matured enough to enable measuring quantum backaction in the continuous displacement detection of a solid mechanical resonator. Moreover reaching the regime in which mechanical vacuum fluctuations dominate opens the door to variety of experiments, from ultra-high position and force sensitivity to producing mechanical quantum states. We use a macroscopic silicon nitride membrane resonator in a high-finesse optical cavity to measure the quantum backaction put forth by a light probe. Here I present initial results of two experiments. In the first we avoid the quantum backaction, and in the second we measure evidence of the resonator being in the quantum mechanical ground state. seminar room on the 9th floor of the Nanobuilding המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
seminar room on the 9th floor of the Nanobuilding
Abstract

Observing and Evading Quantum Backaction in an Interferometer 
N. S. Kampel, T. P. Purdy, P.-L. Yu, R. W. Peterson, and C. A. Regal


The pursuit to eliminate classical noise sources in an interferometer has a long history. Only recently have experimental conditions matured enough to enable measuring quantum backaction in the continuous displacement detection of a solid mechanical resonator. Moreover reaching the regime in which mechanical vacuum fluctuations dominate opens the door to variety of experiments, from ultra-high position and force sensitivity to producing mechanical quantum states.
We use a macroscopic silicon nitride membrane resonator in a high-finesse optical cavity to measure the quantum backaction put forth by a light probe. Here I present initial results of two experiments. In the first we avoid the quantum backaction, and in the second we measure evidence of the resonator being in the quantum mechanical ground state.

תאריך עדכון אחרון : 21/10/2014