Quantum noise with exchange and tunneling: Predictions for a two-particle scattering experiment with time-dependent oscillatory potentials

TL;DR

This paper introduces a new expression for quantum noise in two-particle tunneling experiments, analyzing its dependence on energy and oscillation frequency through numerical simulations, and offers a physical explanation for experimental observations.

Contribution

It presents a novel quantum noise expression for two identical particles in tunneling, validated by numerical simulations with oscillatory potentials.

Findings

Quantum noise depends on electron energy and oscillatory frequency.

The new expression explains simultaneous detection of two electrons at the same side.

Behavior of quantum noise under oscillatory potentials tests the expression's validity.

Abstract

Quantum noise with exchange and tunneling is studied within time-dependent wave packets. A novel expression for the quantum noise of two identical particles injected simultaneously from opposite sides of a tunneling barrier is presented. Such quantum noise expression provides a physical (non-spurious) explanation for the experimental detection of two electrons at the same side under static potentials. Numerical simulations of the two-particle scattering probabilities in a double barrier potential with an oscillatory well are performed. The dependence of the quantum noise on the electron energy and oscillatory frequency are analyzed. The peculiar behaviour of the dependence of the quantum noise on such parameters is proposed as a test about the soundness of this novel quantum noise expression, for either static or oscillatory potentials.