Strong quantum memory at resonant Fermi edges revealed by shot noise

Abstract

Studies of non-equilibrium current fluctuations enable assessing correlations involved in quantum transport through nanoscale conductors. They provide additional information to the mean current on charge statistics and the presence of coherence, dissipation, disorder, or entanglement. Shot noise, being a temporal integral of the current autocorrelation function, reveals dynamical information. In particular, it detects presence of non-Markovian dynamics, i.e., memory, within open systems, which has been subject of many current theoretical studies. We report on low-temperature shot noise measurements of electronic transport through InAs quantum dots in the Fermi-edge singularity regime and show that it exhibits strong memory effects caused by quantum correlations between the dot and fermionic reservoirs. Our work, apart from addressing noise in archetypical strongly correlated system of prime interest, discloses generic quantum dynamical mechanism occurring at interacting resonant Fermi edges.

6 pages, 3 figures

References in corpus (9)

• Assessing non-Markovian dynamics
• Thermodynamical Control by Frequent Quantum Measurements
• Counting Statistics of Non-Markovian Quantum Stochastic Processes
• Twofold advance in the theoretical understanding of far-from-equilibrium properties of interacting nanostructures
• Counting statistics of transport through Coulomb blockade nanostructures: High-order cumulants and non-Markovian effects
• Evolution of the Kondo Effect in a Quantum Dot Probed by the Shot Noise
• New method for studying steady states in quantum impurity problems: The interacting resonant level model
• Shot noise in tunneling through a single quantum dot
• Fermi Edge Singularities in Transport through Quantum Dots

Cited by in corpus (4)

• Electron Waiting Times in Non-Markovian Quantum Transport
• Pauli-Heisenberg Blockade of Electron Quantum Transport
• Non-Markovian effects at the Fermi-edge singularity in quantum dots
• Spatiotemporal Spread of Fermi-edge Singularity as Time Delayed Interaction and Impact on Time-dependent RKKY Type Coupling