Control of Localized Multiple Excitation Dark States in Waveguide QED
- URL: http://arxiv.org/abs/2209.09212v3
- Date: Tue, 18 Oct 2022 14:04:33 GMT
- Title: Control of Localized Multiple Excitation Dark States in Waveguide QED
- Authors: Raphael Holzinger, Ricardo Gutierrez-Jauregui, Teresa
H\"onigl-Decrinis, Gerhard Kirchmair, Ana Asenjo-Garcia, Helmut Ritsch
- Abstract summary: Subradiant excited states in finite chains of two-level quantum emitters coupled to a one-dimensional reservoir are a resource for superior photon storage and controlled photon manipulation.
Here we identify a class of quasi-localized dark states with up to half of the qubits excited, which appear for lattice constants that are an integer multiple of the guided-mode wavelength.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Subradiant excited states in finite chains of two-level quantum emitters
coupled to a one-dimensional reservoir are a resource for superior photon
storage and controlled photon manipulation. Typically, states storing multiple
excitations exhibit fermionic correlations and are thus characterized by an
anti-symmetric wavefunction, which makes them hard to prepare experimentally.
Here we identify a class of quasi-localized dark states with up to half of the
qubits excited, which appear for lattice constants that are an integer multiple
of the guided-mode wavelength. They allow for a high-fidelity preparation and
minimally invasive read out in state-of-the-art setups. In particular, we
suggest an experimental implementation using a coplanar wave-guide coupled to
superconducting transmon qubits on a chip. As free space and intrinsic losses
are minimal, virtually perfect dark states can be achieved even for a low
number of qubits, enabling fast preparation and manipulation with high
fidelity.
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