Cloaking a qubit in a cavity
- URL: http://arxiv.org/abs/2211.05758v2
- Date: Tue, 10 Oct 2023 15:35:22 GMT
- Title: Cloaking a qubit in a cavity
- Authors: Crist\'obal Lled\'o, R\'emy Dassonneville, Adrien Moulinas, Joachim
Cohen, Ross Shillito, Audrey Bienfait, Benjamin Huard, Alexandre Blais
- Abstract summary: Cavity quantum electrodynamics (QED) uses a cavity to engineer the mode structure of the vacuum electromagnetic field.
Controllably decoupling a qubit from the cavity's photon population, effectively cloaking the qubit from the cavity.
Experiment demonstrates how qubit cloaking can be exploited to cancel ac-Stark shift and measurement-induced dephasing.
- Score: 36.136619420474766
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Cavity quantum electrodynamics (QED) uses a cavity to engineer the mode
structure of the vacuum electromagnetic field such as to enhance the
interaction between light and matter. Exploiting these ideas in solid-state
systems has lead to circuit QED which has emerged as a valuable tool to explore
the rich physics of quantum optics and as a platform for quantum computation.
Here we introduce a simple approach to further engineer the light-matter
interaction in a driven cavity by controllably decoupling a qubit from the
cavity's photon population, effectively cloaking the qubit from the cavity.
This is realized by driving the qubit with an external tone tailored to
destructively interfere with the cavity field, leaving the qubit to interact
with a cavity which appears to be in the vacuum state. Our experiment
demonstrates how qubit cloaking can be exploited to cancel ac-Stark shift and
measurement-induced dephasing, and to accelerate qubit readout.
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