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Photonic heat conduction in Josephson-coupled Bardeen-Cooper-Schrieffer superconductors

R. Bosisio, P. Solinas, A. Braggio, F. Giazotto
2016 Physical review B  
We investigate the photon-mediated heat flow between two Josephson-coupled Bardeen-Cooper-Schrieffer (BCS) superconductors.  ...  We demonstrate that in standard low temperature experiments involving temperature-biased superconducting quantum interference devices (SQUIDs), this radiative contribution is negligible if compared to  ...  In this work we focus on Josephson-coupled BCS superconductors, and in particular on the case of a temperaturebiased SQUID, pierced by a magnetic flux Φ.  ... 
doi:10.1103/physrevb.93.144512 fatcat:b4tnlj7thffyfll3klnjdskoba

Cooperative dynamics in a class of coupled two-dimensional oscillators

J. A. Acebrón, W.-J. Rappel, A. R. Bulsara
2003 Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics  
In the presence of noise, a mean-field description leads to a nonlinear Fokker-Planck equation for the system which is investigated for experimentally realistic noise levels.  ...  We study a system of globally coupled two-dimensional nonlinear oscillators ͓using the two-junction superconducting quantum interference device ͑SQUID͒ as a prototype for a single element͔ each of which  ...  one in which a detailed study of the ͑noise-mediated͒ cooperative behavior in various regimes of operation can yield clever techniques for confronting noise-related performance issues that constrain current  ... 
doi:10.1103/physreve.67.016210 pmid:12636588 fatcat:3gjzo6yokfcsfannv75vdzz42a

Quantum dynamics of a dc-SQUID coupled to an asymmetric Cooper pair transistor [article]

A. Fay, W. Guichard, O. Buisson, F. W. J. Hekking
2010 arXiv   pre-print
We present a theoretical analysis of the quantum dynamics of a superconducting circuit based on a highly asymmetric Cooper pair transistor (ACPT) in parallel to a dc-SQUID.  ...  Here the dc-SQUID can be viewed as a tunable micron-size resonator.  ...  The full Hamiltonian of the coupled circuit is presented, describing a two-level system (Cooper pair transistor) coupled to two anharmonic oscillators (dc-SQUID).  ... 
arXiv:1011.6148v1 fatcat:su3olp3bqvg2nk57phklbvj4pa

Superconducting qubit circuit emulation of a vector spin-1/2

Andrew James Kerman
2019 New Journal of Physics  
Quantum spin-1/2 models serve as basic paradigms for a wide variety of physical systems in quantum statistical mechanics and many-body physics, and are among the most highly studied in the context of quantum  ...  In addition, since the spin-1/2 in a magnetic field is one of the simplest realizations of a qubit, many quantum information processing paradigms draw heavily on concepts which originated from or are closely  ...  or the other of the two DC SQUIDs in figure 3 (b).  ... 
doi:10.1088/1367-2630/ab2ee7 fatcat:45n5kmed2nbg3dskwfoqmigbuq

Superconducting microwave magnetometer for absolute flux detection [article]

Simon Günzler, Patrick Winkel, Dennis Rieger, Kiril Borisov, Martin Spiecker, Alexey V. Ustinov, Ioan M. Pop, Wolfgang Wernsdorfer
2021 arXiv   pre-print
Here, we demonstrate that by introducing a second degree of freedom in the form of a second SQUID, we substantially enhance the modulation period M of our device without sacrificing sensitivity.  ...  As a proof of concept, we implement our idea by embedding two asymmetric direct current SQUIDs into a common tank circuit.  ...  The magnetometer circuit consists of two dc SQUIDs, colored in blue and red, that are capacitively coupled by a capacitance Cs.  ... 
arXiv:2107.05929v1 fatcat:xdjnjssvpveolo7jlgoz7vrqdu

Highly efficient phase-tunable photonic thermal diode [article]

G. Marchegiani, A. Braggio, F. Giazotto
2020 arXiv   pre-print
SQUID), which modifies the coupling impedance between the superconductor and the normal metal.  ...  The rectification factor can be also tuned in a phase-controlled fashion through a non-galvanic coupling, realized by changing the magnetic flux piercing a superconducting quantum interference device (  ...  the environmental noise in the system, is typically somewhat higher 10, 11 .  ... 
arXiv:2011.02777v1 fatcat:3czws6x7d5exhgx3ma2sazh4li

Superconducting Quantum Circuits, Qubits and Computing [article]

G. Wendin, V.S. Shumeiko
2005 arXiv   pre-print
This paper gives an introduction to the physics and principles of operation of quantized superconducting electrical circuits for quantum information processing.  ...  This work has been supported by European Commission through the IST-SQUBIT and SQUBIT-2 projects, by the Swedish Research Council, the Swedish Foundation for Strategic Research and the Royal Academy of  ...  Similarly, the coupling of the SCTs considered in Section IX F 2 can be made controllable by employing a dc SQUID as a coupling element.  ... 
arXiv:cond-mat/0508729v1 fatcat:523wefbhwfhmlpjxz4j6xqdxdy

Detection of On-Chip Generated Weak Microwave Radiation Using Superconducting Normal-Metal SET

Behdad Jalali-Jafari, Sergey Lotkhov, Alexander Zorin
2016 Applied Sciences  
On the other hand, the Josephson oscillator, realized as a two-junction SQUID and coupled to the detector via a coplanar transmission line (Al), is shown to provide a tunable source of microwave radiation  ...  The present work addresses quantum interaction phenomena of microwave radiation with a single-electron tunneling system.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app6020035 fatcat:cskxcxilcjetzap4ieuz7phasi

Quantum analysis of a linear dc SQUID mechanical displacement detector

M. P. Blencowe, E. Buks
2007 Physical Review B  
We provide a quantum analysis of a DC SQUID mechanical displacement detector within the sub-critical Josephson current regime.  ...  A segment of the SQUID loop forms the mechanical resonator and motion of the latter is transduced inductively through changes in the flux threading the loop.  ...  Acknowledgements We thank A. Armour, A. Rimberg, and P. Nation for helpful discussions. This work was partly supported by the US-Israel Binational Science Foundation (BSF) and by the National  ... 
doi:10.1103/physrevb.76.014511 fatcat:gwqbz3ysvnabdfc42sacjmrzla

Proximity coupling in superconductor-graphene heterostructures

Gil-Ho Lee, Hu-Jong Lee
2018 Reports on progress in physics (Print)  
The phase-sensitive properties and phase-particle dynamics of graphene Josephson junctions are examined to provide an understanding of the underlying mechanisms of Josephson coupling via graphene.  ...  in device fabrication and the relevant length scales.  ...  An RF-SQUID is coupled to an extremely sensitive magneto-sensor (DC-SQUID), as shown in the schematics of Figure 10c , so that the phase across the GJJ can be inferred by the signal from the DC-SQUID  ... 
doi:10.1088/1361-6633/aaafe1 pmid:29451135 fatcat:i6r5mrwo7ff2bidmurix27wcvy

Superfluid3HeJosephson weak links

J. C. Davis, R. E. Packard
2002 Reviews of Modern Physics  
In this review we describe the development of the field of weak links in superfluid 3 He.  ...  Josephson weak links between samples of macroscopic quantum systems such as superconductors, superfluids, and Bose-Einstein condensates provide a unique tool with which to explore quantum mechanics and  ...  ACKNOWLEDGMENTS We wish to acknowledge and thank present and former members of the Berkeley Ultralow-Temperature Physics group for their many contributions to the experiments at Berkeley that are reported  ... 
doi:10.1103/revmodphys.74.741 fatcat:y5u6xvsylfb3la2d7mcmqowk3i

Materials in superconducting quantum bits

William D. Oliver, Paul B. Welander
2013 MRS bulletin  
collaborations related to the topics presented in this review.  ...  Acknowledgments The authors would like to acknowledge their colleagues at MIT Lincoln Laboratory, MIT campus, NEC, and the University of Tokyo, with whom they have had numerous fruitful discussions and  ...  (a) Paramagnetic behavior of surface spins in SQUIDs at millikelvin temperatures results in a change in the observed fl ux with temperature.  ... 
doi:10.1557/mrs.2013.229 fatcat:zoessgydhzcudl7wmhookgegz4

Collective Cooper-Pair Transport in the Insulating State of Josephson-Junction Arrays

M. V. Fistul, V. M. Vinokur, T. I. Baturina
2008 Physical Review Letters  
We investigate collective Cooper-pair transport of one- and two-dimensional Josephson junction arrays in the insulating state.  ...  The activation energy and the related depinning voltage represent a dynamic Coulomb barrier for collective charge transfer over the whole system and scale with the system size.  ...  Kiselev for hospitality at ICTP Trieste, where the part of this work was completed. This work was supported by the U.S. Department of Energy Office of Science through contract No.  ... 
doi:10.1103/physrevlett.100.086805 pmid:18352651 fatcat:mxg45pjz45hrzocwx5fpkca5si

Superconducting Metamaterials [article]

N. Lazarides, G. P. Tsironis
2017 arXiv   pre-print
We thus attempt to present the rich behavior of coupled superconducting units and point to their basic properties and practical utility.  ...  This flexibility is inherited to SQUID-based MMs, i.e. extended units that contain a large arrangement of SQUIDs.  ...  The authors thank, in no particular order: Alexey V. Ustinov, Steven M. Anlage, Alexandre M. Zagoskin, and Zoran Ivić for helpful discussions, comments, and suggestions.  ... 
arXiv:1712.01323v1 fatcat:7m6pyeig4bgbdkbjt4aimdt4eq

Single-Charge Transistor Based on the Charge-Phase Duality of a Superconducting Nanowire Circuit

T. T. Hongisto, A. B. Zorin
2012 Physical Review Letters  
Assuming a virtual regime of quantum phase slips (QPS)in two narrow segments of the wire, leading to quantum interference of voltages on these segments, this circuit is dual to the dc SQUID.  ...  We propose a transistor-like circuit including two serially connected segments of a narrow superconducting nanowire joint by a wider segment with a capacitively coupled gate in between.  ...  phase biased and, therefore, not strictly dual to resistively shunted junction (RSJ) model for dc SQUID, that of the dc SQUID.)  ... 
doi:10.1103/physrevlett.108.097001 pmid:22463659 fatcat:sakkddiczrhrzb7skq4gjx3hsu
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