Bloch Oscillations of an Exciton-polariton Bose-Einstein Condensate

Abstract

We study theoretically Bloch oscillations of half-matter, half-light quasi-particles: exciton-polaritons. We propose an original structure for the observation of this phenomenon despite the constraints imposed by the relatively short lifetime of the particles and the limitations on the engineered periodic potential. First, we focus on the linear regime in a perfect lattice where regular oscillations are obtained. Second, we take into account a realistic structural disorder known to localize non-interacting particles, which is quite dramatic for propagation-related phenomena. In the non-linear condensed regime the renormalization of the energy provided by interactions between particles allows us to screen efficiently the disorder and to recover oscillations. This effect is useful only in a precise range of parameters outside of which the system becomes dynamically unstable. For a large chemical potential of the order of the potential's amplitude, a strong Landau-Zener tunneling tends to completely delocalize particles.

6 pages, 5 figures. The paper has been strongly modified in version 2

References in corpus (9)

• Observation of Superfluidity of Polaritons in Semiconductor Microcavities
• Superfluidity of Bose-Einstein Condensate in An Optical Lattice: Landau-Zener Tunneling and Dynamical Instability
• Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
• Coherent Oscillations in an Exciton-Polariton Josephson Junction
• Polarization multistability of cavity polaritons
• Half-vortices in polariton condensates
• Bose glass and superfuid phases of cavity polaritons
• Dynamics of Bloch Oscillations in Disordered Lattice Potentials
• Damped Bloch Oscillations of Bose-Einstein Condensates in Disordered Potential Gradients

Cited by in corpus (17)

• Fractional quantum mechanics in polariton condensates with velocity dependent mass
• Self-localization of polariton condensates in periodic potentials
• Two-Dimensional Electrostatic Lattices for Indirect Excitons
• Quasi-compactons and bistability in exciton-polariton condensates
• An exciton-polariton mediated all-optical router
• Nonlinear Bloch-waves and current states of exciton-polariton condensates
• Electric generation of vortices in an exciton-polariton superfluid
• Multivalley engineering in semiconductor microcavities
• Bloch-oscillations of exciton-polaritons and photons for the generation of an alternating terahertz spin current
• Coherent interactions between phonons and exciton or exciton-polariton condensates
• Bloch Oscillations of Hybrid Light-Matter Particles in a Waveguide Array
• Polariton transport in one-dimensional channels
• Quantification of the memory effect of steady-state currents from interaction-induced transport in quantum systems
• Resonant excitation of acoustic waves in one-dimensional exciton-polariton systems
• Chaotic Bloch oscillations in dissipative optical systems driven by a periodic train of coherent pulses
• Disorder Effects on Exciton-Polariton Condensates
• Excitation of Wannier-Stark states in a chain of coupled optical resonators with linear gain and nonlinear losses