Optical detection of single electron transport dynamics

Abstract

The unpredictability of a single quantum event lies at the very core of quantum mechanics. Physical information is therefore drawn from a statistical evaluation of many such processes. Nevertheless, recording each single quantum event in a time trace the "random telegraph signal" is of great value, as it allows insight into the underlying physical system. Here, quantum dots have proven to be well suited systems, as they exhibit both single photon emission and single electron charge transport. While single photon emission is generally studied on self-assembled quantum dots, single electron transport studies are focused on gate-defined structures. We investigate, on a single self-assembled quantum dot, the single electron transport in the optical telegraph signal with high bandwidth and observe in the full counting statistics the interplay between charge and spin dynamics in a noninvasive way. In particular, we are able to identify the spin relaxation of the Zeeman-split quantum-dot level in the charge statistics.

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• Pushing the limits in real-time measurements of quantum dynamics
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• Quantum Fluctuation Theorem under Continuous Measurement and Feedback
• Electron Waiting Times in a Strongly Interacting Quantum Dot: Interaction Effects and Higher-Order Tunneling Processes
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• Environment-induced decay dynamics of anti-ferromagnetic order in Mott-Hubbard systems
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• Counting statistics of dark-state transport through a carbon nanotube quantum dot
• Random telegraph signal analysis with a recurrent neural network
• Full counting statistics in a Majorana single-charge transistor
• Nonlocality of Majorana bound states revealed by electron waiting times in a topological Andreev interferometer
• Unraveling spin dynamics from charge fluctuations
• Semiconductor membranes for electrostatic exciton trapping in optically addressable quantum transport devices
• Random-time quantum measurements
• Internal Photo Effect from a Single Quantum Emitter
• Non-equilibrium boundary driven quantum systems: models, methods and properties
• Transients generate memory and break hyperbolicity in stochastic enzymatic networks
• Making Every Photon Count: A Quantum Polyspectra Approach to the Dynamics of Blinking Quantum Emitters at Low Photon Rates Without Binning
• Full counting statistics and first-passage times in quantum Markovian processes: Ensemble relations, metastability, and fluctuation theorems
• Newton series expansion of bosonic operator functions
• Independent and coherent transitions between antiferromagnetic states of few-molecule systems
• Gauge freedoms in unravelled quantum dynamics: When do different continuous measurements yield identical quantum trajectories?
• Direct measurement of spin-flip rates in single-electron tunneling
• Quantum stochastic resonance in a single-photon emitter
• Dark versus blocking states in electronic transport: a Lee-Yang zero analysis of full counting statistics
• Simulating monitoring-induced topological phase transitions with small systems