205 research outputs found
Effective cavity pumping from weakly coupled quantum dots
We derive the effective cavity pumping and decay rates for the master
equation of a quantum dot-microcavity system in presence of weakly coupled
dots. We show that the in-flow of photons is not linked to the out-flow by
thermal equilibrium relationships.Comment: 6 pages, 1 figure, PLMCN10 conference proceeding
Self-interfering wavepackets
We study the propagation of non-interacting polariton wavepackets. We show
how two qualitatively different concepts of mass that arise from the peculiar
polariton dispersion lead to a new type of particle-like object from
non-interacting fields---much like self-accelerating beams---shaped by the Rabi
coupling out of Gaussian initial states. A divergence and change of sign of the
diffusive mass results in a "mass wall" on which polariton wavepackets bounce
back. Together with the Rabi dynamics, this yield propagation of ultrafast
subpackets and ordering of a spacetime crystal.Comment: (no movies part of this preprint
Generation of a two-photon state from a quantum dot in a microcavity under incoherent and coherent continuous excitation
We analyze the impact of both an incoherent and a coherent continuous
excitation on our proposal to generate a two-photon state from a quantum dot in
a microcavity [New J. Phys. 13, 113014 (2011)]. A comparison between exact
numerical results and analytical formulas provides the conditions to
efficiently generate indistinguishable and simultaneous pairs of photons under
both types of excitation.Comment: 10 pages, 3 figures, conference proceeding
Quantitative Description of Strong-Coupling of Quantum Dots in Microcavities
We have recently developed a self-consistent theory of Strong-Coupling in the
presence of an incoherent pumping [arXiv:0807.3194] and shown how it could
reproduce quantitatively the experimental data [PRL 101, 083601 (2008)]. Here,
we summarize our main results, provide the detailed analysis of the fitting of
the experiment and discuss how the field should now evolve beyond merely
qualitative expectations, that could well be erroneous even when they seem to
be firmly established.Comment: Submitted to the AIP Conference Proceedings Series for the ICPS 2008
(Rio de Janeiro). 2 pages, reduced-quality figur
Lasing in Strong Coupling
An almost ideal thresholdless laser can be realized in the strong-coupling
regime of light-matter interaction, with Poissonian fluctuations of the field
at all pumping powers and all intensities of the field. This ideal scenario is
thwarted by quantum nonlinearities when crossing from the linear to the
stimulated emission regime, resulting in a universal jump in the second order
coherence, which measurement could however be used to establish a standard of
lasing in strong coupling.Comment: 5 pages, 2 figure
Optimization of photon correlations by frequency filtering
Photon correlations are a cornerstone of Quantum Optics. Recent works [NJP 15
025019, 033036 (2013), PRA 90 052111 (2014)] have shown that by keeping track
of the frequency of the photons, rich landscapes of correlations are revealed.
Stronger correlations are usually found where the system emission is weak.
Here, we characterize both the strength and signal of such correlations,
through the introduction of the 'frequency resolved Mandel parameter'. We study
a plethora of nonlinear quantum systems, showing how one can substantially
optimize correlations by combining parameters such as pumping, filtering
windows and time delay.Comment: Small updates to take into account the recent experimental
observation of the physics here analyze
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