2019
DOI: 10.1103/physrevlett.123.143605
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Quantum Rabi Oscillations in Coherent and in Mesoscopic Cat Field States

Abstract: The simple resonant Rabi oscillation of a two-level system in a single-mode coherent field reveals complex features at the mesoscopic scale, with oscillation collapses and revivals. Using slow circular Rydberg atoms interacting with a superconducting microwave cavity, we explore this phenomenon in an unprecedented range of interaction times and photon numbers. We demonstrate the efficient production of 'cat' states, quantum superposition of coherent components with nearly opposite phases and sizes in the range… Show more

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Cited by 25 publications
(13 citation statements)
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“…It is interesting to observe that, for η 0.2, the degree of entanglement strongly differs in the two cases. In particular, while in the wrong dipole gauge both states become entangled cat states [47] displaying maximum entanglement above η = 2, S q goes to zero in the Coulomb gauge, after reaching a maximum at η 0.6.…”
Section: Readout Of a Strongly Coupled Qubitmentioning
confidence: 98%
“…It is interesting to observe that, for η 0.2, the degree of entanglement strongly differs in the two cases. In particular, while in the wrong dipole gauge both states become entangled cat states [47] displaying maximum entanglement above η = 2, S q goes to zero in the Coulomb gauge, after reaching a maximum at η 0.6.…”
Section: Readout Of a Strongly Coupled Qubitmentioning
confidence: 98%
“…The horizontal/ vertical axes are the real/imaginary parts of γ. The cat state, evident in the second and third panels, has been observed experimentally, and measurements of its Wigner function made[52]. The quadratic terms neglected in(14) lead to squeezing, and eventually the state completely loses coherence.…”
mentioning
confidence: 78%
“…The atoms are then made to transit through the high finesses cavity. The atomcavity interaction time has to be adjusted such that the atom undergoes N×2π Rabi oscillations due to the interaction [13]. This ensures that the state of the atom is preserved.…”
Section: Methodsmentioning
confidence: 99%
“…Here T Ω is its time-period of vacuum Rabi oscillations. The atom-cavity interaction is controlled by stark shifting the energy level of the atom by applying an electric field across the cavity [13]. The cavity mirrors are cooled to about 1 K to prevent the dephasing of atoms due to thermal photons [16].…”
Section: Methodsmentioning
confidence: 99%