2 9 N ov 2 00 2 Quantum Noise , Detailed Balance and Kubo Formula in Nonequilibrium Quantum Systems

Current quantum noise can be pictured as a sum over transitions through which the electronic system exchanges energy with its environment. We formulate this picture and use it to show which type of current correlators are measurable, and in what measurement the zero point fluctuations will play a role (the answer to the latter is as expected: only if the… CONTINUE READING