Aguado R, Kouwenhoven LP
Department of Applied Physics and DIMES, Delft University of Technology, P.O. Box 5046, 2600 GA, Delft, The Netherlands and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854-8019, USA.
Phys Rev Lett. 2000 Feb 28;84(9):1986-9. doi: 10.1103/PhysRevLett.84.1986.
We propose a measurement setup for detecting quantum noise over a wide frequency range using inelastic transitions in a tunable two-level system as a detector. The frequency-resolving detector consists of a double quantum dot which is capacitively coupled to the leads of a nearby mesoscopic conductor. The inelastic current through the double quantum dot is calculated in response to equilibrium and nonequilibrium current fluctuations in the nearby conductor, including zero-point fluctuations at very low temperatures. As a specific example, the fluctuations across a quantum point contact are discussed.
我们提出了一种测量装置，用于在宽频率范围内检测量子噪声，该装置使用可调谐两能级系统中的非弹性跃迁作为探测器。频率分辨探测器由一个双量子点组成，该双量子点通过电容耦合到附近介观导体的引线。计算通过双量子点的非弹性电流，以响应附近导体中的平衡和非平衡电流涨落，包括极低温下的零点涨落。作为一个具体例子，讨论了通过量子点接触的涨落。
