Optimal pumping of orbital entanglement with single particle emitters

TL;DR

This paper introduces a method for optimally generating entangled electron and hole pairs in a quantum Hall conductor using time-controlled voltage pulses, enabling efficient entanglement production and detection via Bell inequality violations.

Contribution

It presents a novel entanglement pump that produces orbital Bell pairs at an optimal rate, advancing quantum information processing with single-particle emitters.

Findings

Produces entangled electron and hole pairs at half a pair per cycle

Demonstrates violation of Bell inequality through current correlations

Provides a practical scheme for on-demand entanglement generation

Abstract

We propose a method for the optimal time-controlled generation of entangled itinerant particles, using on-demand sources in a conductor in the quantum Hall regime. This entanglement pump is realized by applying periodic, tailored voltage pulses to pairs of quantum dots or quantum point contacts. We show that the pump can produce orbital Bell pairs of both electrons and holes at the optimal rate of half a pair per pumping cycle. The entanglement can be detected by a violation of a Bell inequality formulated in terms of low-frequency current cross correlations.