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68
Tuning the quantum stability and superconductivity of ultrathin metal alloys
 Science
, 2007
"... Quantum confinement of itinerant electrons in atomically smooth ultrathin lead films produces strong oscillations in the thicknessdependent film energy. By adding extra electrons via bismuth alloying, we showed that both the structural stability and the superconducting properties of such films can ..."
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and can be parametrized in terms of a characteristic temperature, Tc * (less than Tc), that is inversely proportional to the scattering mean free path. The results indicate that the isotropic nature of the superconductive pairing in bulk leadbismuth alloys is altered in the quantum regime. Avariety
Enhancement of parametric pumping due to Andreev reflection
, 2001
"... We report properties of parametric electron pumping in the presence of a superconducting lead. Due to a constructive interference between the direct reflection and the multiple Andreev reflection, the pumped current is greatly enhanced. For both quantum point contacts and double barrier structures a ..."
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We report properties of parametric electron pumping in the presence of a superconducting lead. Due to a constructive interference between the direct reflection and the multiple Andreev reflection, the pumped current is greatly enhanced. For both quantum point contacts and double barrier structures
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"... Parametric frequency conversion in two coupled superconducting resonators ..."
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Parametric frequency conversion in two coupled superconducting resonators
unknown title
, 906
"... Parametric amplification with weaklink nonlinearity in superconducting microresonators ..."
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Parametric amplification with weaklink nonlinearity in superconducting microresonators
Transformation of the Eilenberger Equations of Superconductivity to a Scalar Riccati Equation
"... Abstract. A new parametrization of the Eilenberger equations of superconductivity in terms of the solutions to a scalar differential equation of the Riccati type is introduced. It is shown that the quasiclassical propagator, and in particular the local density of states, may be reconstructed, withou ..."
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Abstract. A new parametrization of the Eilenberger equations of superconductivity in terms of the solutions to a scalar differential equation of the Riccati type is introduced. It is shown that the quasiclassical propagator, and in particular the local density of states, may be reconstructed
Noiseless nonreciprocity in a parametric active device
, 2011
"... Nonreciprocal devices such as circulators and isolators belong to an important class of microwave components employed in applications like the measurement of mesoscopic circuits at cryogenic temperatures [1, 2, 1 Reciprocity is one of the fundamental symmetries frequently encountered in electrical ..."
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Cited by 5 (0 self)
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isolators) for separation of input and output channels [1, 2]. These devices also play a strategic role in measurements based on lownoise microwave parametric amplifiers which, with the exception of designs based on the currentbiased dc SQUID (Superconducting Quantum Interference Device), are also
COLOR SUPERCONDUCTIVITY FROM MAGNETIC INTERACTION INDUCED BY FLOW EQUATIONS
, 2002
"... Using flow equations, we derive an effective quarkquark interaction and obtain the coupled set of gap equations for the condensates of the CFL phase of massless Nf = 3 dense QCD. We find two different sources of the infrared cutoff in magnetic interaction. When the penetration depth of the magnetic ..."
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of the magnetic field inside the superconductor is less than the coherence length of quarkquark bound state, our results for the gap agree with those of Son 4. In the other case, we obtain parametric enhancement of the gap on the coupling constant. 1.
pwave and dwave superconductivity in quasi2D metals
, 2008
"... We compare predictions of the meanfield theory of superconductivity for nearly antiferromagnetic and nearly ferromagnetic metals in two dimensions. The calculations are based on a parametrization of the effective interaction arising from the exchange of magnetic fluctuations. The Eliashberg equatio ..."
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We compare predictions of the meanfield theory of superconductivity for nearly antiferromagnetic and nearly ferromagnetic metals in two dimensions. The calculations are based on a parametrization of the effective interaction arising from the exchange of magnetic fluctuations. The Eliashberg
Superfluid Optomechanics: Coupling of a Superfluid to a Superconducting Condensate
, 2014
"... We investigate the low loss acoustic motion of superfluid 4He parametrically coupled to a very low loss, superconducting Nb, TE011 microwave resonator, forming a gramscale, sideband resolved, optomechanical system. We demonstrate the detection of a series of acoustic modes with quality factors as h ..."
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We investigate the low loss acoustic motion of superfluid 4He parametrically coupled to a very low loss, superconducting Nb, TE011 microwave resonator, forming a gramscale, sideband resolved, optomechanical system. We demonstrate the detection of a series of acoustic modes with quality factors
PARAMETRIC STUDY OF ENERGY DEPOSITION IN THE LHC INNER TRIPLET FOR THE PHASE 1 UPGRADE
"... To be able to make a global parametric analysis and to have some basic understanding of the influence of critical parameters, scaling laws may be of help. For the design of the LHC insertion regions triplets, among the critical parameters the energy deposited in the superconducting triplet plays a f ..."
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To be able to make a global parametric analysis and to have some basic understanding of the influence of critical parameters, scaling laws may be of help. For the design of the LHC insertion regions triplets, among the critical parameters the energy deposited in the superconducting triplet plays a
Results 11  20
of
68