Waveguide Bandgap Engineering with an Array of Superconducting Qubits
- URL: http://arxiv.org/abs/2006.03330v2
- Date: Fri, 5 Feb 2021 12:54:03 GMT
- Title: Waveguide Bandgap Engineering with an Array of Superconducting Qubits
- Authors: Jan David Brehm, Alexander N. Poddubny, Alexander Stehli, Tim Wolz,
Hannes Rotzinger, and Alexey V. Ustinov
- Abstract summary: 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.
- Score: 101.18253437732933
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Waveguide quantum electrodynamics offers a wide range of possibilities to
effectively engineer interactions between artificial atoms via a
one-dimensional open waveguide. While these interactions have been
experimentally studied in the few qubit limit, the collective properties of
such systems for larger arrays of qubits in a metamaterial configuration has so
far not been addressed. Here, we experimentally study a metamaterial made of
eight superconducting transmon qubits with local frequency control coupled to
the mode continuum of a waveguide. By consecutively tuning the qubits to a
common resonance frequency we observe the formation of super- and subradiant
states, as well as the emergence of a polaritonic bandgap. Making use of the
qubits quantum nonlinearity, we demonstrate control over the latter by inducing
a transparency window in the bandgap region of the ensemble. The circuit of
this work extends experiments with one and two qubits towards a full-blown
quantum metamaterial, thus paving the way for large-scale applications in
superconducting waveguide quantum electrodynamics.
Related papers
- Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide.
When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits.
We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
arXiv Detail & Related papers (2024-08-30T15:54:33Z) - Spatial Addressing of Qubits in a Dispersive Waveguide [0.0]
We use dispersion to achieve spatial addressing of superconducting qubits separated by a sub-wavelength distance within a microwave waveguide.
This experiment emphasizes the importance of dispersion in the design and analysis of quantum experiments.
arXiv Detail & Related papers (2024-07-15T11:08:34Z) - Decoding the drive-bath interplay: A guideline to enhance
superconductivity [2.8337642533752083]
We show how a drive which anti-commutes with the superconducting gap operator generically induces an unusual particle-hole structure in the spectral functions.
This structure can be harnessed to enhance the superconducting transition temperature.
Our work paves the way for further studies for driven-dissipative engineering of exotic phases of matter in solid-state systems.
arXiv Detail & Related papers (2023-06-05T13:26:09Z) - 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) - Coupling Quantum Antennas to Fibers and Waveguides [0.0]
We present a brief overview of the transport of quantum light across a one-dimensional waveguide.
We demonstrate a scheme to implement transparency by suitably tuning the atomic frequencies.
The fiber-mediated interaction between integrated dipoles allows one to achieve both dispersive and dissipative couplings.
arXiv Detail & Related papers (2021-11-05T00:13:19Z) - Waveguide quantum electrodynamics: collective radiance and photon-photon
correlations [151.77380156599398]
Quantum electrodynamics deals with the interaction of photons propagating in a waveguide with localized quantum emitters.
We focus on guided photons and ordered arrays, leading to super- and sub-radiant states, bound photon states and quantum correlations with promising quantum information applications.
arXiv Detail & Related papers (2021-03-11T17:49:52Z) - Quantum chaos driven by long-range waveguide-mediated interactions [125.99533416395765]
We study theoretically quantum states of a pair of photons interacting with a finite periodic array of two-level atoms in a waveguide.
Our calculation reveals two-polariton eigenstates that have a highly irregular wave-function in real space.
arXiv Detail & Related papers (2020-11-24T07:06:36Z) - Waveguide quantum optomechanics: parity-time phase transitions in
ultrastrong coupling regime [125.99533416395765]
We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction.
The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry.
The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
arXiv Detail & Related papers (2020-07-04T11:02:20Z)
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.