Experiments in Quantum Electro-Mechanics Keith Schwab, National Security Agency

I will discuss our recent experiments with integrated nanomechanics and nanoelectronics. We have succeeded to approach the quantum limit of a high Q, 20 MHz nanomechanical resonator tightly coupled to a single-electron transistor. We have achieved continuous position detection a factor of 4 from the uncertainty principle, and have observed the thermal motion of the resonator down to a temperature of 55 mK, corresponding to quantum occupation factor of N_{TH}=58. Our results and measurement techniques open the door to a wealth of milli-kelvin quantum electro-mechanics experiments such as freezeout to the quantum ground state, quantum-limited feedback cooling, the production of squeezed states, and ultimately the formation of superposition and entangled states by interaction with solid state qubits.