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Microwave Counting Statistics of Quantum Electronic Systems

Microwave Counting Statistics of Quantum Electronic Systems Robert F. McDermott, University of Wisconsin-Madison, DMR 1105178.

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Microwave Counting Statistics of Quantum Electronic Systems

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  1. Microwave Counting Statistics of Quantum Electronic Systems Robert F. McDermott, University of Wisconsin-Madison, DMR 1105178 The goal of the project is to use coincidence counting techniques to probe temporal correlations and full counting statistics of microwave photons emitted by phase coherent conductors and parametrically modulated, nonlinear superconducting quantum cavities. We have developed a new self-resetting bias circuit that simplifies operation of the Josephson-junction microwave counter: absorption of a photon creates a large, easily measured voltage pulse. In a parallel thrust, we have developed an experimental scheme where the strong interaction between a superconducting quantum bit (“qubit”) and a microwave resonator circuit will be used to probe the microwave emission from mesoscopic quantum conductors. Improved microwave counter circuit: photon in  voltage pulse out Superconducting qubit circuit for study of microwave noise from mesoscopic conductors

  2. Microwave Counting Statistics of Quantum Electronic Systems Robert F. McDermott, University of Wisconsin-Madison, DMR 1105178 • Supervised undergraduate researchers Antonio Puglielli, Nick Grabon, Kale Johnson, and Patrick Bollom • Upgraded experiments in the Physics Dept. undergraduate Advanced Laboratory course. Introduced new experiment to measure violation of Bell’s inequality using polarization-entangled photons. • Participated in UW-Madison Physics open house. Presented hands-on demonstrations of eddy-current damping, magnetic levitation with high-Tc superconductivity, and Superconducting QUantrum Interference Devices (SQUIDs) Mie scattering apparatus, UW-Madison Physics undergraduate Advanced Laboratory

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