81 citations · 180 across the 5 of their papers we have counts for
5 papers
The Effect of Parameter Variations on the Performance of the Josephson Travelling Wave Parametric Amplifiers
Searbhán Ó Peatáin, Tom Dixon, Phil J. Meeson +3
We have simulated the performance of the Josephson Travelling Wave Parametric Amplifier (JTWPA) based on the one-dimensional array of RF SQUIDs. Unlike the ideal model in which all…
Capturing Complex Behaviour in Josephson Travelling Wave Parametric Amplifiers
Tom Dixon, Jacob W. Dunstan, George B. Long +3
We present an analysis of wave-mixing in recently developed Josephson Travelling Wave Parametric Amplifiers (JTWPAs). Circuit simulations performed using WRspice show the full beha…
Existence of Shapiro Steps in the Dissipative Regime in Superconducting Weak Links
Connor D. Shelly, Patrick See, Ivan Rungger +1
We present measurements of microwave-induced Shapiro steps in a superconducting nanobridge weak link in the dissipative branch of a hysteretic current-voltage characteristic. We de…
Precision comparison of the quantum Hall effect in graphene and gallium arsenide
T. J. B. M. Janssen, J. M. Williams, N. E. Fletcher +6
The half-integer quantum Hall effect in epitaxial graphene is compared with high precision to the well known integer effect in a GaAs/AlGaAs heterostructure. We find no difference…
The quantum metrology triangle and the re-definition of the SI ampere and kilogram; Analysis of a reduced set of observational equations
Martin J. T. Milton, Jonathan M. Williams, Alistair B. Forbes
We have developed a set of seven observational equations that include all of the physics necessary to relate the most important of the fundamental constants to the definitions of t…