Index OMC_final - Harvard University

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QUANTUM-OPTOMECHANICS IN THE WEAK AND STRONG COUPLING REGIME Markus Aspelmeyer Unversity of Vienna I will discuss some of our current experiments to achieve quantum optical control over mechanical quantum states. This includes optomechanics using ultracold cryogenic cavities and the demonstration of optomechanical parametric downconversion, which is at the heart of optomechanical quantum entanglement.. 8
TOWARDS QUANTUM SUPERPOSITIONS OF A MIRROR Dirk Bouwmeester Department of Physics, <strong>University</strong> of California, Santa Barbara, & Huygens Laboratory, <strong>University</strong> of Leiden, the Netherlands Using a tiny mirror attached to a micromechanical resonator as one of the mirrors in an interferometer we aim to investigate macroscopic quantum superpositions. We analyze the effects of finite temperature on the proposed experiment and conclude that an unambiguous demonstration of a quantum superposition requires the mechanical resonator to be in or near the ground state. This can in principle be achieved by optical cooling of the fundamental mode, which also provides a method for measuring the mean phonon number in that mode. We also calculate the rate of environmentally induced decoherence and estimate the timescale for gravitational collapse mechanisms as proposed by Penrose and Diosi. We will show experimental data on optical cooling of an optical trampoline resonator starting from dilution refrigeration temperatures. Finally we discuss the technical challenges to be overcome in order to test quantum mechanics in the regime where gravitational effects might interfere. 9
Page 1 and 2: Table of Contents WORKSHOP SCHEDULE
Page 3 and 4: Schedule MONDAY, FEBRUARY 7 Phillip
Page 5 and 6: JAMIL ABO-SHAEER PARTICIPANTS Darpa
Page 7: MONIKA SCHLEIER-SMITH SWATI SINGH P
Page 11 and 12: LINEAR AND QUADRATIC OPTOMECHANICS
Page 13 and 14: OPTOMECHANICS OF A QUANTUM DEGENERA
Page 15 and 16: NONLINEAR OPTOMECHANICS: QUADRATIC
Page 17 and 18: THE PHOTON BLOCKADE EFFECT IN OPTOM
Page 19 and 20: OPTOMECHANICAL MATTER-WAVE INTERFER
Page 21 and 22: CAVITY OPTOMECHANICS: BEYOND THE GR
Page 23 and 24: CIRCUIT CAVITY ELECTROMECHANICS IN
Page 25 and 26: RADIATION PRESSURE AND QUANTUM NOIS
Page 27 and 28: ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !

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