The quantum and classical field scattered on a single two-level system
- URL: http://arxiv.org/abs/2302.13762v1
- Date: Mon, 27 Feb 2023 13:44:50 GMT
- Title: The quantum and classical field scattered on a single two-level system
- Authors: Sergei Gunin, Andrei Vasenin, Aleksei Dmitriev, Konstantin Tikhonov,
Gleb Fedorov, Oleg Astafiev
- Abstract summary: In many problems, the scattering amplitudes of weak coherent pulse are almost equivalent to the ones of single propagating photon.
We thoroughly compare the scattering of: (i) short microwave coherent pulse from rf generator and (ii) vacuum-photon coherent superposition from the two-level Emitter.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In many problems, the scattering amplitudes of weak coherent pulse are almost
equivalent to the ones of single propagating photon. We thoroughly compare the
scattering of: (i) short microwave coherent pulse from rf generator and (ii)
vacuum-photon coherent superposition from the two-level Emitter, both directed
to a single two-level system (the Probe). To do that, we use two
superconducting qubits to implement Emitter and Probe, both strongly coupled to
the same waveguide. However, with the use of magnetic circulator we couple the
field from Emitter to the Probe without reverse backaction, thereby working
with a cascaded atomic system implemented in waveguide-QED setup. By measuring
the dynamics of scattered field, we find a certain discrepancy between two
cases, confirmed by analytical and numerical study. Particularly, we find the
optimal amplitude $\Omega_{*}$ of classical pulse mimicking the superposition
from Emitter, for which the difference becomes very small (but non-vanishing),
and is almost unavailable to measure in practice.
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