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

E. Zakka-Bajjani, J. Ségala, F. Portier, P. Roche, D. C. Glattli, A. Cavanna, Y. Jin
2007 Physical Review Letters  
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<hν/e. Our measurements provide the first
more » ... lete test of the finite frequency shot noise scattering theory without adjustable parameters.
doi:10.1103/physrevlett.99.236803 pmid:18233393 fatcat:c6hnrjzesvd2nfm3awyuj6s5nm