Photon-arrival detector with a controlled phase flip operation between a photon and a V-type atomic system

TL;DR

This paper introduces a photon-arrival detector using a V-type atomic system within a cavity, capable of high-efficiency detection and state projection, suitable for integrated solid-state quantum technologies.

Contribution

It proposes a novel photon-arrival detection method employing a V-type atom-cavity system, enhancing detection efficiency and enabling repeated measurements.

Findings

Higher quantum efficiency than conventional photodetectors

Capable of repeated photon arrival detection

Effective state projection to single photon state

Abstract

We propose a photon-arrival detector (PAD), which detects the arrival of a signal photon and simultaneously projects the signal input state to a single photon state, with an atom-cavity system. In this proposal, use of a V-type system as the intracavity atom is discussed for implementing the PAD, since V-type systems have been widely studied in the field of solid state, enabling us to miniaturize and integrate that implementation. The performance of the proposed PAD is evaluated for a specific method of the detection process. The proposed PAD is capable of repeating the procedure for detecting the arrival of input photons and it has improves the detection probability so that it has a higher quantum efficiency than those of conventional photodetectors.