# Deterministic subtraction of single photons based on a coupled single quantum dot-cavity system

## TL;DR

This paper proposes a solid-state system using a quantum dot coupled to a bimodal cavity to deterministically subtract single photons, demonstrated through numerical simulations with various input states.

## Contribution

It introduces a novel scheme for deterministic single-photon subtraction using a coupled quantum dot-cavity system in a solid-state platform.

## Key findings

- System can transfer one photon to the second mode deterministically
- Effective for both Fock and coherent input states
- Numerical simulations validate the scheme's feasibility

## Abstract

We describe a scheme of deterministic single-photon subtraction in a solid-state system consisting of a charged quantum dot coupled to a bimodal photonic-crystal cavity with a moderate magnetic field applied in a Voigt configuration. We numerically simulate injection of optical pulses into one of the modes of the bimodal cavity and show that the system deterministically transfers one photon into the second cavity mode for input pulses in the form of both Fock states and coherent states.