Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact

Abstract

We report on direct measurements of the electronic shot noise of a quantum point contact at frequencies nu in the range 4-8 GHz. The very small energy scale used ensures energy independent transmissions of the few transmitted electronic modes and their accurate knowledge. Both the thermal energy and the quantum point contact drain-source voltage Vds are comparable to the photon energy hnu leading to observation of the shot noise suppression when $V_{ds}<h\nu /e$. Our measurements provide the first complete test of the finite frequency shot noise scattering theory without adjustable parameters.

Version Published in Phys. Rev. Lett. (Phys. Rev. Lett. 99, 236803 (2007))

References in corpus (6)

• Frequency-selective single photon detection using a double quantum dot
• Using a quantum dot as a high-frequency shot noise detector
• The relaxation time of a chiral quantum R-L circuit
• Antibunched photons emitted by a quantum point contact out of equilibrium
• Feedback of the electromagnetic environment on current and voltage fluctuations out of equilibrium
• Suppression of Shot Noise in Quantum Point Contacts in the "0.7" Regime

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• High Frequency Dynamics and Third Cumulant of Quantum Noise
• Formulation of Time-Resolved Counting Statistics Based on a Positive-Operator-Valued Measure
• Detecting THz current fluctuations in a quantum point contact using a nanowire quantum dot
• Finite frequency noise of a superconductor/ferromagnet quantum point contact
• Noise-induced spectral shift measured in a Double Quantum Dot