Unveiling and veiling a Schr\"odinger cat state from the vacuum
- URL: http://arxiv.org/abs/2110.02674v1
- Date: Wed, 6 Oct 2021 11:49:48 GMT
- Title: Unveiling and veiling a Schr\"odinger cat state from the vacuum
- Authors: Roberto Stassi, Mauro Cirio, Ken Funo, Neill Lambert, Jorge Puebla,
Franco Nori
- Abstract summary: A two-level atom interacting with a cavity mode takes the form of a "virtual" Schr"odinger cat entangled state between light and matter.
We propose a method to convert this Schr"odinger cat state from virtual to real, and back again, by driving the atom with optimally chosen pulses.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Deep in the ultrastrong light-matter coupling regime, it has been predicted
that the ground state of a two-level atom interacting with a cavity mode takes
the form of a "virtual" Schr\"odinger cat entangled state between light and
matter. We propose a method to convert this Schr\"odinger cat state from
virtual to real, and back again, by driving the atom with optimally chosen
pulses. Our system consists of a four-level atom, with two of these levels
ultrastrongly coupled to a cavity mode. We show that the Schr\"odinger cat
state can be converted between virtual and real by making use of either an
ideal ultrafast pulse or a multi-tone {\pi}-pulse. In addition to allowing us
to observe these unusual virtual states this method could also be used to
generate entangled cat states on demand for quantum information processing.
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