MENÜ MENÜ  

cover

Decoherence and Time-Resolved Readout in Superconducting Quantum Circuits (Dekohärenz und zeitaufgelösste Quantenmessung in supraleitenden Schaltkreisen)

Augsburger Schriften zur Mathematik, Physik und Informatik , Bd. 16

Georg M. Reuther

ISBN 978-3-8325-2846-1
157 pages, year of publication: 2011
price: 35.00 €
Decoherence and Time-Resolved Readout in Superconducting Quantum Circuits (Dekohärenz und zeitaufgelösste Quantenmessung in supraleitenden Schaltkreisen)
Superconducting quantum circuits are promising candidates for solid-state based quantum computation. However, minimizing dissipation caused by external noise sources remains a tough challenge. Here, we present an analytic dissipative theory for a complex circuit of two resonators coupled via a flux qubit. In this 'quantum switch', the qubit acts as a tunable coupler between the resonators, which enables switching their interaction on and off. A natural application of this setup is to create entangled two-resonator states. However, it turns out that, even if the qubit has no dynamics, qubit dissipation affects the resonators to a considerable degree.

For successful quantum information processing, it is desirable to demonstrate the coherence of qubit time evolution in single-shot experiments without too much backaction on the qubit. In the second part of this thesis, we present a novel scheme for a time-resolved single-run measurement of coherent qubit dynamics. For a charge qubit probed by a weak high-frequency signal, we find that the reflected outgoing signal possesses a time-dependent phase shift that is proportional to a qubit observable. A similar approach is presented for a flux qubit coupled to a resonantly driven high-frequency oscillator, which serves as a meter device for monitoring the time-resolved qubit dynamics.

cover cover cover cover cover cover cover cover cover
Keywords:
  • superconducting quantum circuits / supraleitende Schaltkreise
  • quantum information / Quanteninformation
  • dissipative quantum systems / dissipative Quantensysteme
  • quantum measurement / Quantenmessung
  • quantum electrodynamics / Quantenelektrodynamik

BUYING OPTIONS

35.00 €
only 2 in stock

34.00 €
45.00 €
49.00 €

(D) = Within Germany
(W) = Abroad

*You can purchase the eBook (PDF) alone or combined with the printed book (eBundle). In both cases we use the payment service of PayPal for charging you - nevertheless it is not necessary to have a PayPal-account. With purchasing the eBook or eBundle you accept our licence for eBooks.

For multi-user or campus licences (MyLibrary) please fill in the form or write an email to order@logos-verlag.de