Thursday, March 24, 2016
1:00 pm
West Bridge 351 (LIGO Science Conference Room) – Norman Bridge Laboratory of Physics, West

LIGO Seminar

Quantum Speed Meter Based on Dissipative Coupling
Sergey Vyatchanin, Moscow State Univeristy

We show that generalized dissipative opto-mechanical coupling enables a direct quantum measurement of speed of a free test mass. An optical detection of a weak classical mechanical force based on this speed meter allows to surpass the Standard Quantum Limit.

In addition, a second speaker:

Leonid Prokhorov (Moscow State University)
"Interaction of the ESD with electrical charges of the test masses in Advanced LIGO."
Charging or redistribution of electrical charge on the LIGO mirrors could change the force applied by the electrostatic drive (ESD). It results in changing of the actuation coefficient of the ESD and additional fluctuating force acting on the test masses. The forces acting on the test mass from the ESD and the results of the charge measurements of the Advanced LIGO test masses will be discussed

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