title: Quantum interference induced photon blockade in a coupled single quantum dot-cavity system.
abstract: We propose an experimental scheme to implement a strong photon blockade with a single quantum dot coupled to a nanocavity. The photon blockade effect can be tremendously enhanced by driving the cavity and the quantum dot simultaneously with two classical laser fields. This enhancement of photon blockade is ascribed to the quantum interference effect to avoid two-photon excitation of the cavity field. Comparing with Jaynes-Cummings model, the second-order correlation function at zero time delay g((2))(0) in our scheme can be reduced by two orders of magnitude and the system sustains a large intracavity photon number. A red (blue) cavity-light detuning asymmetry for photon quantum statistics with bunching or antibunching characteristics is also observed. The photon blockade effect has a controllable flexibility by tuning the relative phase between the two pumping laser fields and the Rabi coupling strength between the quantum dot and the pumping field. Moreover, the photon blockade scheme based on quantum interference mechanism does not require a strong coupling strength between the cavity and the quantum dot, even with the pure dephasing of the system. This simple proposal provides an effective way for potential applications in solid state quantum computation and quantum information processing.
authors.affiliation: 1] Institute of Photo-electronic Thin Film Devices and Technology, Nankai University, Tianjin 300071, P. R. China [2] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
authors.forename: Jing
authors.initials: J
authors.lastname: Tang
authors.affiliation: Institute of Photo-electronic Thin Film Devices and Technology, Nankai University, Tianjin 300071, P. R. China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Geng
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, P. R. China.
authors.forename: Xiulai
authors.initials: X
authors.lastname: Xu