Pietikäinen, I., Danilin, S. , Kumar, K.S., Vepsäläinen, A., Golubev, D.S., Tuorila, J. and Paraoanu, G.S. (2017) Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition. Physical Review B, 96(2), 020501(R). (doi: 10.1103/physrevb.96.020501)
|
Text
188122.pdf - Accepted Version 8MB |
Abstract
We show that the counter-rotating terms of the dispersive qubit-cavity Rabi model can produce relatively large and nonmonotonic Bloch-Siegert shifts in the cavity frequency as the system is driven through a quantum-to-classical transition. Using a weak microwave probe tone, we demonstrate experimentally this effect by monitoring the resonance frequency of a microwave cavity coupled to a transmon and driven by a microwave field with varying power. In the weakly driven regime (quantum phase), the Bloch-Siegert shift appears as a small constant frequency shift, while for a strong drive (classical phase) it presents an oscillatory behavior as a function of the number of photons in the cavity. The experimental results are in agreement with numerical simulations based on the quasienergy spectrum.
| Item Type: | Articles |
|---|---|
| Additional Information: | The authors are grateful for the financial support from the Academy of Finland (Projects No. 263457 and No. 135135), the Magnus Ehrnrooth Foundation, the Finnish Cultural Foundation, the Vilho, Yrjö, and Kalle Väisälä Foundation, FQXi, Centre of Quantum Engineering at Aalto University (Project QMET), and the Centres of Excellence LTQ (Project No. 250280), and COMP (Projects No. 251748 and No. 284621). |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Danilin, Dr Sergey |
| Authors: | Pietikäinen, I., Danilin, S., Kumar, K.S., Vepsäläinen, A., Golubev, D.S., Tuorila, J., and Paraoanu, G.S. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| ISSN (Online): | 1550-235X |
| Published Online: | 07 July 2017 |
| Copyright Holders: | Copyright © 2017 American Physical Society |
| First Published: | First published in Physical Review B 96(2): 020501(R) |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
| Related URLs: |
University Staff: Request a correction | Enlighten Editors: Update this record
Altmetric
Altmetric