Soft-photon emission from electron-pair tunneling in small Josephson junctions

1982 ◽  
Vol 26 (3) ◽  
pp. 1475-1476 ◽  
Author(s):  
A. Widom ◽  
G. Pancheri ◽  
Y. Srivastava ◽  
G. Megaloudis ◽  
T. D. Clark ◽  
...  
Keyword(s):  
Josephson Junctions ◽  
Electron Pair ◽  
Photon Emission ◽  
Soft Photon ◽  
Pair Tunneling

SPIN DEPENDENCE OF PAIR TUNNELING PROPERTIES OF Bi2Sr2CaCu2O8+x INTRINSIC JOSEPHSON JUNCTIONS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 199-203 ◽  
Author(s):  
DO BANG ◽  
HU-JONG LEE ◽  
MYUNG-HO BAE ◽  
WANG-HYUN PARK
Keyword(s):  
External Field ◽  
Single Crystal ◽  
Josephson Junctions ◽  
Phase Fluctuation ◽  
Superconducting Gap ◽  
Spin Dependence ◽  
Intrinsic Josephson Junctions ◽  
Pair Tunneling ◽  
Spin Polarized ◽  
Pancake Vortices

Detailed tunneling characteristics of a stack of intrinsic Josephson junctions in a Bi 2 Sr 2 CaCu 2 O 8+x single crystal were obtained both in spin-degenerate and spin-polarized bias configurations. Injection of the spin-polarized quasiparticles effectively weakened the in-plane superconducting strength and the interlayer Jospehson coupling. The superconducting gap and the Josephson critical current of the stack were, in general, further suppressed by an external field applied in parallel with the c-axis direction. Study of the spin-dependent tunneling characteristics may provide valuable information on clarifying the mechanism of high-Tc superconductivity as well as the interlayer phase fluctuation induced by the "pancake vortices" on CuO 2 layers.

scholarly journals On the Low-Burnett-Kroll theorem for soft-photon emission

1969 ◽  
Vol 60 (1) ◽  
pp. 62-68 ◽  
Author(s):  
J. S. Bell ◽  
R. Van Royen
Keyword(s):  
Photon Emission ◽  
Soft Photon

scholarly journals Free-free Transitions of the Hydrogenic Systems Inside A Dense Plasma Irradiated by A Laser Field

2015 ◽  
Vol 2 (1) ◽  
pp. 55-72
Author(s):  
Anand K. Bhatia
Keyword(s):  
Cross Sections ◽  
Laser Field ◽  
Single Photon ◽  
Photon Emission ◽  
Incident Electron ◽  
Soft Photon ◽  
Present Calculation ◽  
Strong Suppression ◽  
Plasma Screening ◽  
Linearly Polarized

In previous papers [Sinha and Bhatia, Phys. Rev. A 83, 063417 (2011), and Bhatia and Sinha, Phys. Rev. A 86, 053421 (2012)] cross sections for the freefree transitions are calculated for a low energy (external) electron hydrogen scattering in the presence of an external homogeneous, monochromatic, and linearly polarized laser field, without and with the presence of plasma screening, respectively. The present calculation is extended to hydrogenic systems with nuclear charge greater than one. The Debye-Hückel approximation is used to investigate the effect of plasma screening. Calculations are carried out in the soft photon limit. The incident electron is considered to be dressed by the laser field non-perturbatively by choosing the Volkov solutions in both the initial and final states. The scattering wave function for the electron is obtained in the exchange approximation. The laserassisted differential and total cross sections are calculated for single photon emission or absorption and no photon-exchange in the soft-photon limit, the laser intensity being much less than the atomic field intensity. The calculations have been carried out for various values of Debye parameter $\mu$, ranging from 0.08 to 0.30. A strong suppression is noted for the laser-assisted singlet and triplet cross sections compared to the field-free situation. The suppression depends on $\mu$, state of the system as well as on the incident electron momentum. This is unlike in the case of the hydrogen atom in the laser field where the suppression was much more for the triplet cross sections compared to the field-free situation.

Electron pair tunneling resonance in a double-dot interferometry

2010 ◽  
Vol 82 (23) ◽  
Author(s):  
Jinhong Park ◽  
H.-S. Sim
Keyword(s):  
Electron Pair ◽  
Pair Tunneling
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