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Kavli Nanoscience Institute / Microdevices Lab seminar
Date: Monday, March 1, 2010
Time: 4:00 PM
Location: 125 Steele, Caltech
Speaker: Pierre Echternach, JPL and Matt Shaw, Caltech
Caltech applied physics postdoctoral scholar Shaw will discuss approaching the quantum regime in nano-electro-mechanical systems, and tools and techniques for quantum state preparation and measurement in nanomechanical oscillators. Nano-electro-mechanical systems (NEMS) offer a unique opportunity to investigate quantum mechanical effects in macroscopic devices. He will review recent progress by the Schwab group in developing tools to prepare and measure cold mechanical states of a macroscopic oscillator coupled to a superconducting microwave resonator. He demonstrates cavity-assisted sideband cooling into a regime near the ground state of motion, and a back-action-evasion measurement technique with sensitivity approaching the standard quantum limit. It is anticipated that these techniques can be used in the near future to generate and observe nonclassical states in macroscopic mechanical systems.
Echternach, a JPL senior microdevices engineer, will introduce the Quantum Capacitance Detector, a concept for a pair-breaking photodetector for far-infrared and submillimeter radiation in which antenna-coupled radiation generates quasiparticles in a superconducting absorber, the density of which is measured using a single Cooper-pair box. He will discuss preliminary electrical NEP measurements made by direct quasiparticle injection and optical characterization of an antenna coupled device.
Light refreshments will be served after the seminar, which is part of a monthly series sponsored by Caltech’s Kavli Nanoscience Institute and JPL's Microdevices Lab.