Publication

Coherent Oscillations in an Exciton-Polariton Josephson Junction

Benoît Marie Joseph Deveaud
2010
Journal Articles

Abstract

We report on the observation of spontaneous coherent oscillations in a microcavity polariton bosonic Josephson junction. Condensation of exciton polaritons here takes place under incoherent excitation in a double potential well naturally formed in the disorder. Coherent oscillations set on at an excitation power well above the condensation threshold. The time resolved population and phase dynamics reveal the analogy with the ac Josephson effect. A theoretical two-mode model describes the observed effects, explaining how the different realizations of the pulsed experiment can be in phase.

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https://infoscience.epfl.ch/entities/publication/ea30c785-8da2-4717-a39f-5ff6a49fa2e2

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Benoît Marie Joseph Deveaud
2010
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ea30c785-8da2-4717-a39f-5ff6a49fa2e2

About this result

Related concepts (23)

Coherent state

In physics, specifically in quantum mechanics, a coherent state is the specific quantum state of the quantum harmonic oscillator, often described as a state which has dynamics most closely resembling the oscillatory behavior of a classical harmonic oscillator. It was the first example of quantum dynamics when Erwin Schrödinger derived it in 1926, while searching for solutions of the Schrödinger equation that satisfy the correspondence principle.

Neural oscillation

Neural oscillations, or brainwaves, are rhythmic or repetitive patterns of neural activity in the central nervous system. Neural tissue can generate oscillatory activity in many ways, driven either by mechanisms within individual neurons or by interactions between neurons. In individual neurons, oscillations can appear either as oscillations in membrane potential or as rhythmic patterns of action potentials, which then produce oscillatory activation of post-synaptic neurons.

Squeezed coherent state

In physics, a squeezed coherent state is a quantum state that is usually described by two non-commuting observables having continuous spectra of eigenvalues. Examples are position and momentum of a particle, and the (dimension-less) electric field in the amplitude (phase 0) and in the mode (phase 90°) of a light wave (the wave's quadratures). The product of the standard deviations of two such operators obeys the uncertainty principle: and , respectively.

Related publications (1)

Coherent Oscillations in an Exciton-Polariton Josephson Junction

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Coherent oscillations between polariton vortex and anti-vortex states in an elliptical resonator