Tuning a near-equilibrium quantum-dot charge sensor changes how strongly Anderson orthogonality suppresses resonant tunneling in a coupled dot, demonstrating controllable many-body measurement backaction.
Direct signatures of Anderson orthogonality catastrophe in nonequilibrium quantum dots
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abstract
We propose schemes for unambiguous direct observation of Anderson orthogonality catastrophe (AOC) effects in a quantum dot coupled to a charge detector, and to estimate the strength of the AOC exponent $\alpha$. We show that certain easy-to-measure observables have a robust dependence on $\alpha$ in the non-equilibrium regimes of source-drain voltage bias or thermal imbalance. Our results are obtained using a rate equation formalism in which the AOC effects on tunnel rates are incorporated in an exact manner.
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Anderson Orthogonality as Measurement Backaction in Coupled Quantum Dots
Tuning a near-equilibrium quantum-dot charge sensor changes how strongly Anderson orthogonality suppresses resonant tunneling in a coupled dot, demonstrating controllable many-body measurement backaction.