Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

resonator phase matching T. C. White, J. Y. Mutus, I.-C. Hoi, R. Barends, B. Campbell, Yu Chen, Z. Chen, B. Chiaro, A. Dunsworth, E. Jeffrey, J. Kelly, A. Megrant, C. Neill, P. J. J. O’Malley, P. Roushan, D. Sank, A. Vainsencher, J. Wenner, S. Chaudhuri, J. Gao, and John M. Martinis Department of Physics, University of California, Santa Barbara, California 93106-9530, USA Department of Material...

TRAVELING WAVE PARAMETRIC AMPLIFIER WITH JOSEPHSON JUNCTIONS USING MINIMAL RESONATOR PHASE MATCHING (SUPPLEMENTARY INFORMATION) Coupled Mode Equations

where ∆k = ki+ks−2kp is the phase mismatch calculated from weak-signal dispersion of the transmission line. The term on the right hand side of the pump equation represents the selfphase modulation due to the AC pump current interacting with itself. Analogous cross-phase modulation processes are represented by the rst term on the right hand side of the signal and idler equations; the other term ...

A near-quantum-limited Josephson traveling-wave parametric amplifier.

Detecting single-photon level signals—carriers of both classical and quantum information—is particularly challenging for low-energy microwave frequency excitations. Here we introduce a superconducting amplifier based on a Josephson junction transmission line. Unlike current standing-wave parametric amplifiers, this traveling wave architecture robustly achieves high gain over a bandwidth of seve...

Resonator coupled Josephson junctions; parametric excitations and mutual locking

Josephson Junctions with Minimal Length

The minimal length of “one-dimensional” Josephson junctions, in which the specific bound states of the magnetic flux retain their stability is discussed numerically. Thereby, we consider as “long” every Josephson junction, in which there exists at least one nontrivial stable distribution of the magnetic flux for fixed values of all the physical and the geometrical parameters. Our results can be...