The unshunted SQUID revisited

作者: Mikko Kiviranta

DOI: 10.1088/0953-2048/24/6/065003

关键词: SQUIDJosephson effectQuantumInterferometryNoise (radio)Background noiseSuperconductivityPhysicsCondensed matter physicsSignal-to-noise ratio

摘要: We have demonstrated stable running-mode operation of a superconducting quantum interferometer whose Josephson junction shunts are capacitively blocked in order to cut the signal-band noise currents. An intrinsic energy resolution 26 times Planck's constant was reached, which is compared against numerical estimate obtained downmixing picture.

参考文章(16)
K.K. Likharev, V.K. Semenov, Fluctuation spectrum in superconducting point junctions Jetp Letters. ,vol. 15, pp. 442- ,(1972)
Dietmar Drung, High-Tc and low-Tc dc SQUID electronics Superconductor Science and Technology. ,vol. 16, pp. 1320- 1336 ,(2003) , 10.1088/0953-2048/16/12/002
H. Seppa, T. Ryhanen, Influence of the signal coil on DC-SQUID dynamics IEEE Transactions on Magnetics. ,vol. 23, pp. 1083- 1086 ,(1987) , 10.1109/TMAG.1987.1065125
Mikko Kiviranta, Leif Grönberg, Betty Young, Blas Cabrera, Aaron Miller, Progress Towards Large Locally Linearized SQUID Arrays THE THIRTEENTH INTERNATIONAL WORKSHOP ON LOW TEMPERATURE DETECTORS—LTD13. ,vol. 1185, pp. 526- 529 ,(2009) , 10.1063/1.3292395
M. Kiviranta, H. Seppä, Noise simulation of the un SQUID Applied Superconductivity. ,vol. 6, pp. 373- 378 ,(1998) , 10.1016/S0964-1807(98)00081-7
Mikko Kiviranta, Jari S Penttilä, Leif Grönberg, Juha Hassel, Antti Virtanen, Heikki Seppä, Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation Superconductor Science and Technology. ,vol. 17, pp. 285- 289 ,(2004) , 10.1088/0953-2048/17/5/038
R. C. Jaklevic, John Lambe, A. H. Silver, J. E. Mercereau, Quantum Interference Effects in Josephson Tunneling Physical Review Letters. ,vol. 12, pp. 159- 160 ,(1964) , 10.1103/PHYSREVLETT.12.159
H. Seppa, M. Kiviranta, L. Gronberg, Dc SQUID based on unshunted Josephson junctions: experimental results IEEE Transactions on Applied Superconductivity. ,vol. 5, pp. 3248- 3251 ,(1995) , 10.1109/77.403284
Matthias Meschke, Wiebke Guichard, Jukka P. Pekola, Single-mode heat conduction by photons Nature. ,vol. 444, pp. 187- 190 ,(2006) , 10.1038/NATURE05276
T. L. Robertson, B. L. T. Plourde, T. Hime, S. Linzen, P. A. Reichardt, F. K. Wilhelm, John Clarke, Superconducting quantum interference device with frequency-dependent damping : Readout of flux qubits Physical Review B. ,vol. 72, pp. 024513- ,(2005) , 10.1103/PHYSREVB.72.024513