Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition
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Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition. / Pietikäinen, I.; Danilin, S.; Sampath Kumar, Karthikeyan; Vepsäläinen, A.; Golubev, D. S.; Tuorila, J.; Paraoanu, G. S.
julkaisussa: Physical Review B, Vuosikerta 96, Nro 2, 020501, 07.07.2017, s. 1-5.Tutkimustuotos: Lehtiartikkeli › › vertaisarvioitu
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T1 - Observation of the Bloch-Siegert shift in a driven quantum-to-classical transition
AU - Pietikäinen, I.
AU - Danilin, S.
AU - Sampath Kumar, Karthikeyan
AU - Vepsäläinen, A.
AU - Golubev, D. S.
AU - Tuorila, J.
AU - Paraoanu, G. S.
PY - 2017/7/7
Y1 - 2017/7/7
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85026396033&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.96.020501
DO - 10.1103/PhysRevB.96.020501
M3 - Article
VL - 96
SP - 1
EP - 5
JO - Physical Review B (Condensed Matter and Materials Physics)
JF - Physical Review B (Condensed Matter and Materials Physics)
SN - 2469-9950
IS - 2
M1 - 020501
ER -
ID: 14582035
