co nd - m at / 9 90 94 42 30 S ep 1 99 9 Enhancement of Josephson quasiparticle
نویسنده
چکیده
The Josephson quasiparticle (JQP) cycle in a voltage-biased superconducting single-electron transistor (SSET) combines coherent Cooper pair tunneling with incoherent quasiparticle decay. We have measured the influence of current flow through an independently-biased SSET on the JQP cycle when the two SSET’s have a strong mutual capacitive coupling. We find, among other effects, that the JQP current in one SSET is enhanced by the presence of a quasiparticle current in the other SSET. A simplified model of the coupledSSET system is presented which reproduces the enhancement effect. PACS numbers: 73.23.Hk, 74.50.+r, 85.30.Wx, 85.25.Na
منابع مشابه
ar X iv : c on d - m at / 9 90 52 72 v 1 [ co nd - m at . s up r - co n ] 1 9 M ay 1 99 9 Pairing
We study the Cu5O4 cluster by exact diagonalization of a three-band Hubbard model and show that bound electron or hole pairs are obtained at appropriate fillings, and produce superconducting flux quantisation. The results extend earlier cluster studies and illustrate a canonical transformation approach to pairing that we have developed recently for the full plane. The quasiparticles that in the...
متن کاملar X iv : c on d - m at / 9 60 40 34 v 1 5 A pr 1 99 6 Josephson and Quasiparticle Tunneling between Anisotropically Paired Superconductors
Charge transport in tunnel junctions between singlet anisotropically paired superconductors is investigated theoretically making use of the Eilenberger equations for the quasiclassical Green functions. For specularly reflecting tunnel barrier plane we have found and described analytically characteristic singular points of the I-V curves which are specific for the case of anisotropic pairing. Al...
متن کاملco nd - m at / 9 90 93 96 28 S ep 1 99 9 Explaining the Forward Interest Rate Term Structure
We present compelling empirical evidence for a new interpretation of the Forward Rate Curve (frc) term structure. We find that the average frc follows a squareroot law, with a prefactor related to the spot volatility, suggesting a Value-at-Risk like pricing. We find a striking correlation between the instantaneous frc and the past spot trend over a certain time horizon. This confirms the idea o...
متن کاملOn Josephson effects in insulating spin systems
We discuss an experiment in which two magnetic insulators that both show a field-induced magnetic ordering transition are weakly coupled to one another and are placed into an external magnetic field. If the respective magnetic states can be interpreted as phase-coherent Bose–Einstein condensates of magnetic bosonic quasiparticles, one expects the occurrence of Josephson effects. For two identic...
متن کامل