Microwave Photon Antibunching at the Modulation of the Resonance Frequency of a Qubit Emitter

TL;DR

This paper investigates how modulating the resonance frequency of a qubit with RF fields affects photon statistics, revealing controlled transitions between photon bunching and antibunching, with implications for quantum systems.

Contribution

It demonstrates how periodic modulation of a qubit's resonance frequency can control photon statistics, including the transition to sub-Poissonian behavior and collapse-revival phenomena.

Findings

Photon antibunching can be achieved through frequency modulation.

Photon statistics can be smoothly tuned from bunching to antibunching.

Collapse-revival oscillations in photon correlations are identified.

Abstract

The statistics photons in the resonance fluorescence of a qubit excited by microwave and radio-frequency (RF) fields have been studied. It has been established that the coherent dissipative dynamics of the qubit with allowance for multiphoton emission and absorption of RF photons in each act of emission and absorption of a microwave photon results in periodic alternation of photon bunching and antibunching. It has been shown that periodically varying statistics photons can be smoothly transformed to the purely sub-Poisson statistics by varying the parameters of the RF field. The conditions for the formation of the "collapse-revival" of oscillations in the second-order correlation function photons have been determined. The described effects can be implemented on spin and superconducting qubits, quantum dots, and qubit-mechanical hybrid systems.