Exciting half-integer charges in a quantum point contact

Abstract

We study a voltage-driven quantum point contact (QPC) strongly coupled to a qubit. We predict pronounced observable features in the QPC current that can be interpreted in terms of half-integer charge transfers. Our analysis is based on the Keldysh generating functional approach and contains general results, valid for all coherent conductors.

7 pages, 6 figures

References in corpus (3)

• Production and detection of entangled electron-hole pairs in a degenerate electron gas
• Using a quantum dot as a high-frequency shot noise detector
• Quantum Tunneling Detection of Two-photon and Two-electron Processes