15,297 research outputs found
Laser diagnostics and minor species detection in combustion using resonant four-wave mixing
Peer reviewedPostprin
Thermal emission from a single glass fiber
In this article, we study the thermal light emission from individual fibers
of an industrial glass material, which are elementary building blocks of glass
wool boards used for thermal insulation. Thermal emission spectra of single
fibers of various diameters partially suspended on air are measured in the
far-field by means of infrared spatial modulation spectroscopy.These
experimental spectra are compared with the theoretical absorption efficiency
spectra of cylindrical shaped fibers calculated analytically in the framework
of Mie theory taking as an input the measured permittivity of the industrial
glass material. An excellent qualitative agreement is found between the
measured thermal radiation spectra and the theoretical absorption efficiency
spectra.Comment: 25 pages, 5 figures, JQSRT, 201
Deterministic and cascadable conditional phase gate for photonic qubits
Previous analyses of conditional \phi-phase gates for photonic qubits that
treat cross-phase modulation (XPM) in a causal, multimode, quantum field
setting suggest that a large (~\pi rad) nonlinear phase shift is always
accompanied by fidelity-degrading noise [J. H. Shapiro, Phys. Rev. A 73, 062305
(2006); J. Gea-Banacloche, Phys. Rev. A 81, 043823 (2010)]. Using an atomic
V-system to model an XPM medium, we present a conditional phase gate that, for
sufficiently small nonzero \phi, has high fidelity. The gate is made cascadable
by using using a special measurement, principal mode projection, to exploit the
quantum Zeno effect and preclude the accumulation of fidelity-degrading
departures from the principal-mode Hilbert space when both control and target
photons illuminate the gate
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