Tunable electromagnetic environment for superconducting quantum bits.

Abstract:

:We introduce a setup which realises a tunable engineered environment for experiments in circuit quantum electrodynamics. We illustrate this concept with the specific example of a quantum bit, qubit, in a high-quality-factor cavity which is capacitively coupled to another cavity including a resistor. The temperature of the resistor, which acts as the dissipative environment, can be controlled in a well defined manner in order to provide a hot or cold environment for the qubit, as desired. Furthermore, introducing superconducting quantum interference devices (SQUIDs) into the cavity containing the resistor, provides control of the coupling strength between this artificial environment and the qubit. We demonstrate that our scheme allows us to couple strongly to the environment enabling rapid initialization of the system, and by subsequent tuning of the magnetic flux of the SQUIDs we may greatly reduce the resistor-qubit coupling, allowing the qubit to evolve unhindered.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Jones PJ,Huhtamäki JA,Salmilehto J,Tan KY,Möttönen M

doi

10.1038/srep01987

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

1987

issn

2045-2322

pii

srep01987

journal_volume

3

pub_type

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