Photon blockade via quantum interference in a strong coupling qubit-cavity system

Authors:
Open Access
Publisher website
Google Scholar
Abstract
In a coherently-driven nanocavity QED system, the one-photon blockade via quantum interference is investigated by the modified Lindblad master equation and without using the secular approximation as well. Based on the dressed bases of the Rabi Hamiltonian, a modified Lindblad master equation is obtained, which is valid for any arbitrary degree of the qubit-cavity interaction. It is found that the damping coefficients are very sensitive to interaction strength between the qubit and the cavity mode. How to enhance the one-photon blockade by using the quantum interference effect is discussed with the generalized second-order correlation function and the second-order perturbation in the five-state truncation of the Hilbert space. It is found that, under suitable pump or detection conditions, a strong one-photon blockade can be realized by completely eliminating the two-photon emission. Moreover, even for a strong cavity damping rate, there exhibits a large number of cavity photons by utilizing the quantum interference mechanism.
Funding Information
  • China Postdoctoral Science Foundation (2015M570652)
  • National Natural Science Foundation of China (NSFC) (11271147, 11474119, 61275123)
  • Natural Science Foundation of Hubei Province (2015CFB661)

This publication has 69 references indexed in Scilit: