Bose-Einstein quantum phase transition in an optical lattice model
Bose-Einstein condensation (BEC) in cold gases can be turned on and off by an\nexternal potential, such as that presented by an optical lattice. We present a\nmodel of this phen...
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1,101 publications
General method for calibrating Sun photometers
A general method for calibrating Sun photometers that relaxes the constraints on atmospheric conditions is described. Instead of requiring constant extinction conditions the met...
Estimating taxonomic diversity, extinction rates, and speciation rates from fossil data using capture-recapture models
Methods currently used to estimate taxonomic extinction probabilities from fossil data generally assume that the probability of encountering a specimen in a particular stratum, ...
Surface polaritons on gold-wire gratings
A resonance phenomenon in the zeroth diffraction order of a gold-wire grating is explained by the excitation of surface polaritons. This effect is connected with a strong enhanc...
Paramagnetoelectric Effects in NiS<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>·6<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">H</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>O
Piezoelectric paramagnetic crystals can show a linear dependence of the paramagnetic susceptibility on an applied electric field. This effect has been detected in NiS${\mathrm{O...
Electrically switchable, two-color quantum cascade laser emitting at 1.39 and 2.3THz
A quantum cascade laser emitting at 1.39 and 2.3THz is demonstrated. The structure is based on a large single quantum well and multiwavelength operation is obtained by selective...
C<sub>60</sub>-Containing Poly(1-phenyl-1-alkynes): Synthesis, Light Emission, and Optical Limiting
While polymerizations of 1-phenyl-1-propyne (PP) and 1-phenyl-1-butyne (PB) initiated by WCl6−Ph4Sn at room temperature yield small amounts of polymers (0.05−5.3%) with low mole...
Generation, propagation, and amplification of dark solitons
The use of guided-wave Mach–Zehnder interferometers to generate dark solitons with constant background is further examined. Under optimal conditions, both the input optical powe...
Submicron sensors of local electric field with single-electron resolution at room temperature
We describe probes of a local electric field, which are capable of detecting an electric charge as small as the charge of one electron e, operational under ambient conditions an...