29 November 2023
Strongly Correlated Electrons
Develop computational method combining diagrammatic Monte Carlo and vectorization formalism
Apply to interacting quantum dot with coupling to fermionic bath and local dephasing
Dephasing reduces average diagram order, alleviating sign problem
Charge dynamics on dot exhibit slowing down with increasing dephasing
Spin dynamics less affected by dephasing processes
Real-time dynamics of an interacting quantum dot with dephasing
We develop a computational method to study the real-time dynamics of a small interacting quantum system coupled to a quantum environment and local dephasing processes. We find that strong dephasing slows down charge dynamics on the quantum dot, a signature of the quantum Zeno effect, while spin dynamics are less affected. Our method reaches longer timescales than previous techniques.
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