95 research outputs found
Observation of spatial quantum correlations induced by multiple scattering of non-classical light
We present the experimental realization of spatial quantum correlations of
photons that are induced by multiple scattering of squeezed light. The quantum
correlation relates photons propagating along two different light trajectories
through the random medium and is infinite in range. Both positive and negative
spatial quantum correlations are observed when varying the quantum state
incident to the multiple scattering medium, and the magnitude of the
correlations is controlled by the number of photons. The experimental results
are in excellent agreement with recent theoretical proposals by implementing
the full quantum model of multiple scattering
Continuous-wave spatial quantum correlations of light induced by multiple scattering
We present theoretical and experimental results on spatial quantum
correlations induced by multiple scattering of nonclassical light. A continuous
mode quantum theory is derived that enables determining the spatial quantum
correlation function from the fluctuations of the total transmittance and
reflectance. Utilizing frequency-resolved quantum noise measurements, we
observe that the strength of the spatial quantum correlation function can be
controlled by changing the quantum state of an incident bright squeezed-light
source. Our results are found to be in excellent agreement with the developed
theory and form a basis for future research on, e.g., quantum interference of
multiple quantum states in a multiple scattering medium.Comment: 8 pages, 6 figure
Statistical theory of a quantum emitter strongly coupled to Anderson-localized modes
A statistical theory of the coupling between a quantum emitter and
Anderson-localized cavity modes is presented based on a dyadic Green's function
formalism. The probability of achieving the strong light-matter coupling regime
is extracted for an experimentally realistic system composed of InAs quantum
dots embedded in a disordered photonic crystal waveguide. We demonstrate that
by engineering the relevant parameters that define the quality of light
confinement, i.e. the light localization length and the loss length, strong
coupling between a single quantum dot and an Anderson-localized cavity is
within experimental reach. As a consequence of disorder-induced light
confinement provides a novel platform for quantum electrodynamics experiments.Comment: 5 pages, 4 figure
Demonstration of Quadrature Squeezed Surface-Plasmons in a Gold Waveguide
We report on the efficient generation, propagation, and re-emission of
squeezed long-range surface-plasmon polaritons (SPPs) in a gold waveguide.
Squeezed light is used to excite the non-classical SPPs and the re-emitted
quantum state is fully quantum characterized by complete tomographic
reconstruction of the density matrix. We find that the plasmon-assisted
transmission of non-classical light in metallic waveguides can be described by
a Hamiltonian analogue to a beam splitter. This result is explained
theoretically
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