Bolometric Detection of Quantum Shot Noise in Coupled Mesoscopic Systems

Abstract

We present a new scheme to detect the quantum shot noise in coupled mesoscopic systems. By applying the noise thermometry to the capacitively coupled quantum point contacts (QPCs) we prove that the noise temperature of one QPC is in perfect proportion to that of the other QPC which is driven to non-equilibrium to generate quantum shot noise. We also found an unexpected effect that the noise in the source QPC is remarkably suppressed possibly due to the cooling effect by the detector QPC.

4 pages, 4 figures

References in corpus (5)

• Cooling a nanomechanical resonator with quantum back-action
• Frequency-selective single photon detection using a double quantum dot
• Using a quantum dot as a high-frequency shot noise detector
• A system for measuring auto- and cross-correlation of current noise at low temperatures
• Counterflow of electrons in two isolated quantum point contacts

Cited by in corpus (2)

• Universality of Bias- and Temperature-induced Dephasing in Ballistic Electronic Interferometers
• Conductance Anomaly and Fano Factor Reduction in Quantum Point Contacts