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TT: Fachverband Tiefe Temperaturen
TT 12: Fluctuations and Noise
TT 12.4: Vortrag
Montag, 18. März 2024, 15:45–16:00, H 3007
Strongly correlated radiation of a tunnel junction due to charge quantization — •Steven Kim and Fabian Hassler — Institute for Quantum Information, RWTH Aachen University, 52056 Aachen, Germany
A chaotic light source is characterized by the fact that many independent, identical emitters radiate with a random optical phase. For such light sources, the correlation of the photons, characterized by the second-order coherence, is always given by g(2)(0)=2. One might expect that a tunnel junction with many channels produces chaotic light as many independent channels contribute to the radiation. We study the radiation emitted by a tunnel junction embedded in a cavity at low temperatures. Surprisingly, we find that the radiation deviates from the prediction of chaotic light. In particular, we find strong correlations of the photons. These correlations originate from shot-noise, where a single electron traversing the junction emits multiple photons.
Keywords: Microwave photons; Correlated light; Tunnel junction; Nonchaotic light