2004/11/17 by D. I. Tsomokos, D I Tsomokos, C. C. Chong +3
Computer Science · Physics and Astronomy · #Josephson effect #Macroscopic quantum phenomena #Mesoscopic physics #Microwave #Pi Josephson junction #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum tunnelling #Squid #cond-mat.mes-hall #cond-mat.supr-con #quant-ph
paper · pdf · doi:10.1088/0953-8984/16/50/008
published as Journal of Physics: Condensed Matter 16 (2004) 9169-9180 · 8 pages, 6 figures, two-column format; to appear in J. Phys.: Condens. Matt
arxiv created 2004/11/17 · openalex publication_date 2004/12/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Two mesoscopic SQUID rings which are far from each other, are considered. A source of two-mode nonclassical microwaves irradiates the two rings with correlated photons. The Josephson currents are in this case quantum mechanical operators, and their expectation values with respect to the density matrix of the microwaves, yield the experimentally observed currents. Classically correlated (separable) and quantum mechanically correlated (entangled) microwaves are considered, and their effect on the Josephson currents is quantified. Results for two different examples that involve microwaves in number states and coherent states are derived. It is shown that the quantum statistics of the tunnelling electron pairs through the Josephson junctions in the two rings, are correlated.