Decoherence in ballistic mesoscopic interferometers
Georg Seelig, Sebastian Pilgram, and Markus Buttiker
TL;DR
This paper offers a theoretical explanation for decoherence observed in Aharonov-Bohm oscillations in ballistic rings, highlighting charge fluctuations and exchange with reservoirs, using a time-dependent scattering matrix approach.
Contribution
It introduces a time-dependent scattering matrix method to analyze decoherence in ballistic mesoscopic interferometers due to charge fluctuations.
Findings
Decoherence arises from charge exchange between the system and reservoirs.
Charge fluctuations significantly impact Aharonov-Bohm oscillations.
The scattering matrix approach effectively models decoherence processes.
Abstract
We provide a theoretical explanation for two recent experiments on decoherence of Aharonov-Bohm oscillations in two- and multi-terminal ballistic rings. We consider decoherence due to charge fluctuations and emphasize the role of charge exchange between the system and the reservoir or nearby gates. A time-dependent scattering matrix approach is shown to be a convenient tool for the discussion of decoherence in ballistic conductors.
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Taxonomy
TopicsQuantum and electron transport phenomena · Organic and Molecular Conductors Research · Semiconductor Quantum Structures and Devices