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.
Related papers
- Fragmented superconductivity in the Hubbard model as solitons in
Ginzburg-Landau theory [58.720142291102135]
Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials.
We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model.
We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
arXiv Detail & Related papers (2023-07-21T18:00:07Z) - The Multimode Character of Quantum States Released from a
Superconducting Cavity [0.0]
We study the release of complex quantum states from a superconducting resonator.
We quantify the multi-mode character of the output state and discuss how to optimize the fidelity of a quantum state transfer process.
arXiv Detail & Related papers (2023-06-21T09:16:39Z) - Hyper-entanglement between pulse modes and frequency bins [101.18253437732933]
Hyper-entanglement between two or more photonic degrees of freedom (DOF) can enhance and enable new quantum protocols.
We demonstrate the generation of photon pairs hyper-entangled between pulse modes and frequency bins.
arXiv Detail & Related papers (2023-04-24T15:43:08Z) - Experimental realization of deterministic and selective photon addition
in a bosonic mode assisted by an ancillary qubit [50.591267188664666]
Bosonic quantum error correcting codes are primarily designed to protect against single-photon loss.
Error correction requires a recovery operation that maps the error states -- which have opposite parity -- back onto the code states.
Here, we realize a collection of photon-number-selective, simultaneous photon addition operations on a bosonic mode.
arXiv Detail & Related papers (2022-12-22T23:32:21Z) - Experimental Realization and Characterization of Stabilized Pair
Coherent States [4.486044407450978]
PCS is an interesting class of non-Gaussian continuous-variable entangled state.
PCS is at the heart of a promising quantum error correction code: the pair cat code.
We report an experimental demonstration of the pair coherent state of microwave photons in two superconducting cavities.
arXiv Detail & Related papers (2022-09-23T15:24:25Z) - Bound states in microwave QED: Crossover from waveguide to cavity regime [0.0]
Light-matter interaction at the single-quantum level is the heart of many regimes of high fundamental importance to modern quantum technologies.
We formulate a unifying theory which under a minimal set of standard approximations accounts for physical boundaries of a system.
Our theory can be straightforwardly extended to other waveguides such as the photonic crystal and coupled cavity arrays.
arXiv Detail & Related papers (2022-08-01T01:19:47Z) - Slowing down light in a qubit metamaterial [98.00295925462214]
superconducting circuits in the microwave domain still lack such devices.
We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide.
Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
arXiv Detail & Related papers (2022-02-14T20:55:10Z) - Coherent control of a symmetry-engineered multi-qubit dark state in
waveguide quantum electrodynamics [0.0]
Quantum electrodynamics studies qubits coupled to a mode continuum, exposing them to a loss channel and causing quantum information to be lost before coherent operations can be performed.
Here we restore coherence by realizing a dark state that exploits symmetry properties and interactions between four qubits.
Our experiment paves the way for implementations of quantum many-body physics in waveguides and the realization of quantum information protocols using decoherence-free subspaces.
arXiv Detail & Related papers (2021-06-10T10:06:23Z) - Tunable Anderson Localization of Dark States [146.2730735143614]
We experimentally study Anderson localization in a superconducting waveguide quantum electrodynamics system.
We observe an exponential suppression of the transmission coefficient in the vicinity of its subradiant dark modes.
The experiment opens the door to the study of various localization phenomena on a new platform.
arXiv Detail & Related papers (2021-05-25T07:52:52Z) - Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control.
We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap.
The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
arXiv Detail & Related papers (2020-06-05T09:27:53Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.