{ "id": "0805.1037", "version": "v1", "published": "2008-05-07T18:26:06.000Z", "updated": "2008-05-07T18:26:06.000Z", "title": "Quantum Noise, Effective Temperature, and Damping in a Superconducting Single-Electron Transistor", "authors": [ "W. W. Xue", "Z. Ji", "Feng Pan", "Joel Stettenheim", "A. J. Rimberg" ], "comment": "5 pages, 4 figures", "categories": [ "cond-mat.mes-hall", "cond-mat.supr-con" ], "abstract": "We have directly measured the quantum noise of a superconducting single-electron transistor (S-SET) embedded in a microwave resonator consisting of a superconducting LC tank circuit. Using an effective bath description, we find that the S-SET provides damping of the resonator modes proportional to its differential conductance and has an effective temperature that depends strongly on the S-SET bias conditions. In the vicinity of a double Cooper pair resonance, when both resonances are red detuned the S-SET effective temperature can be well below both the ambient temperature and the energy scale of the bias voltage. When blue detuned, the S-SET shows negative differential conductivity,", "revisions": [ { "version": "v1", "updated": "2008-05-07T18:26:06.000Z" } ], "analyses": { "keywords": [ "superconducting single-electron transistor", "effective temperature", "quantum noise", "superconducting lc tank circuit", "resonator modes proportional" ], "note": { "typesetting": "TeX", "pages": 5, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2008arXiv0805.1037X" } } }