Ultrastrong Tunable Coupler Between Superconducting <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><mml:mi>L</mml:mi><mml:mi>C</mml:mi></mml:math> Resonators

Tunable Superconducting Split Ring Resonators

Fast tunable coupler for superconducting qubits.

A major challenge in the field of quantum computing is the construction of scalable qubit coupling architectures. Here, we demonstrate a novel tunable coupling circuit that allows superconducting qubits to be coupled over long distances. We show that the interqubit coupling strength can be arbitrarily tuned over nanosecond time scales within a sequence that mimics actual use in an algorithm. Th...

Analysis of a tunable coupler for superconducting phase qubits

This paper presents a theoretical analysis of the recently realized tunable coupler for superconducting phase qubits R. C. Bialczak et al., arXiv:1007.2219 unpublished . The coupling can be turned off by compensating a negative mutual inductance with a tunable Josephson inductance. The main coupling in this system is of the XX type and can be zeroed exactly, while there is also a small undesire...

Optomechanical-like coupling between superconducting resonators

J. R. Johansson,1,* G. Johansson,2 and Franco Nori3,4 1iTHES Research Group, RIKEN, Wako-shi, Saitama 351-0198, Japan 2Microtechnology and Nanoscience, MC2, Chalmers University of Technology, SE-412 96 Göteborg, Sweden 3CEMS, RIKEN, Wako-shi, Saitama 351-0198, Japan 4Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040, USA (Received 4 April 2014; published 18 November ...

Tunable multimode interference coupler

Introduction: Multimode interference (MMI) couplers have been widely used in integrated photonic devices because of their compact size, wide optical bandwidth, polarisation independence and relaxed fabrication tolerances [1]. In most applications they operate as passive components, and only recently has their use as active components for the development of photonic switches been investigated [2...