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SUMMARY:Quantum Zeno Dynamics in 3D circuit-QED
DTSTART;VALUE=DATE-TIME:20190710T123000Z
DTEND;VALUE=DATE-TIME:20190710T124300Z
DTSTAMP;VALUE=DATE-TIME:20200929T215439Z
UID:indico-contribution-72401@indico.in2p3.fr
DESCRIPTION:Speakers: Denis Vion (CEA-SPEC-Quantronique)\nWe present our o
bservation of the quantum Zeno dynamics (QZD) [1] in a 3D circuit-QED [2]
system\, where an artificial atom\, consisting of a superconducting circui
t called a transmon [3]\, is coupled to the electric field of a microwave
cavity resonator. The transmon and resonator energy levels are aligned in
a novel way enabling the manipulation of individual Fock states of the cav
ity\, while minimizing its transmon-induced Kerr non-linearity [4]. We ind
uce the QZD as in [5] by displacing classically the cavity field while con
tinuously driving strongly a transmon transition specific to a particular
Fock state. The QZD is then observed by measuring the Wigner function of t
he fields at regular time intervals\, by standard quantum tomography and r
econstruction of the density matrix. We observe three examples of QZD prop
osed in [6]\, and analyze the observed decoherence with the help of quantu
m simulations of the system.\n\n[1] P Facchi and S Pascazio\, J. Phys. A:
Math. Theor. 41 (2008).\n[2] A. Blais et al.\, Phys. Rev. A. 69 (2004).\n[
3] J. Koch et al.\, Phys. Rev. A. 76 (2007).\n[4] K. Juliusson et al.\, Ph
ys. Rev. A 94 (2016).\n[5] L. Bretheau et al.\, Science 348\, 6236 (2015)\
n[6] J. M. Raimond et al.\, Phys. Rev. A. 86 (2012).\n\nhttps://indico.in2
p3.fr/event/16792/contributions/72401/
LOCATION:Cité des Congrès Salle I
URL:https://indico.in2p3.fr/event/16792/contributions/72401/
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