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 (25)

• Shot Noise in Mesoscopic Conductors
• Measure for the Degree of Non-Markovian Behavior of Quantum Processes in Open Systems
• Entanglement and non-Markovianity of quantum evolutions
• Assessing non-Markovian dynamics
• Experimental control of the transition from Markovian to non-Markovian dynamics of open quantum systems
• Microscopic derivation of rate equations for quantum transport
• Nonequilibrium Transport in Quantum Impurity Models (Bethe-Ansatz for open systems)
• Thermodynamical Control by Frequent Quantum Measurements
• Counting Statistics of Non-Markovian Quantum Stochastic Processes
• Quantum Shot Noise
• Twofold advance in the theoretical understanding of far-from-equilibrium properties of interacting nanostructures
• Memory Effects In Nonequilibrium Quantum Impurity Models
• Counting statistics of transport through Coulomb blockade nanostructures: High-order cumulants and non-Markovian effects
• Noisy Kondo impurities
• Evolution of the Kondo Effect in a Quantum Dot Probed by the Shot Noise
• A simple measure of memory for dynamical processes described by the generalized Langevin equation
• Fermi-Edge Resonance and Tunneling in Nonequilibrium Electron Gas
• New method for studying steady states in quantum impurity problems: The interacting resonant level model
• Magnetic-field-induced singularities in spin dependent tunneling through InAs quantum dots
• Enhanced Shot Noise in Tunneling through a Stack of Coupled Quantum Dots
• Shot noise in tunneling through a single quantum dot
• Shot noise in the self-dual Interacting Resonant Level Model
• Fermi Edge Singularities in Transport through Quantum Dots
• Noise at a Fermi-edge singularity
• Tunneling resonances in quantum dots: Coulomb interaction modifies the width

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• Electron Waiting Times in Non-Markovian Quantum Transport
• Optical Signatures of Non-Markovian Behaviour in Open Quantum Systems
• Orthogonality catastrophe and decoherence in a trapped-Fermion environment
• Non-Markovian effects in electronic and spin transport
• A Knob for Markovianity
• Five approaches to exact open-system dynamics: Complete positivity, divisibility and time-dependent observables
• Pauli-Heisenberg Blockade of Electron Quantum Transport
• Spin-dependent shot noise enhancement in a quantum dot
• Fermi-edge singularity in chiral one-dimensional systems far from equilibrium
• Manifestation of Fermi edge singularity in the cotunneling regime
• Non-Markovian effects at the Fermi-edge singularity in quantum dots
• Fermi-edge singularity and related interaction induced phenomena in multilevel quantum dots
• Decoherence enhanced quantum measurement of a quantum dot spin qubit
• Non-Markovian Equilibration Controlled by Symmetry Breaking
• Phonon influence on the measurement of spin states in double quantum dots using the quantum point contact
• Current noise spectrum in a solvable model of tunneling Fermi-edge singularity
• Charge transfer statistics and qubit dynamics at tunneling Fermi-edge singularity
• Spatiotemporal Spread of Fermi-edge Singularity as Time Delayed Interaction and Impact on Time-dependent RKKY Type Coupling