# Engineering the level structure of a giant artificial atom in waveguide quantum electrodynamics

@article{Vadiraj2020EngineeringTL, title={Engineering the level structure of a giant artificial atom in waveguide quantum electrodynamics}, author={A. M. Vadiraj and Andreas Ask and Thomas McConkey and Ibrahim Nsanzineza and C. W. Sandbo Chang and Anton Frisk Kockum and C. M. Wilson}, journal={arXiv: Quantum Physics}, year={2020} }

Engineering light-matter interactions at the quantum level has been central to the pursuit of quantum optics for decades. Traditionally, this has been done by coupling emitters, typically natural atoms and ions, to quantized electromagnetic fields in optical and microwave cavities. In these systems, the emitter is approximated as an idealized dipole, as its physical size is orders of magnitude smaller than the wavelength of light. Recently, artificial atoms made from superconducting circuits…

## 36 Citations

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## References

SHOWING 1-10 OF 56 REFERENCES

### Non-exponential decay of a giant artificial atom

- PhysicsNature Physics
- 2019

In quantum optics, light–matter interaction has conventionally been studied using small atoms interacting with electromagnetic fields with wavelength several orders of magnitude larger than the…

### Resonance Fluorescence of a Single Artificial Atom

- PhysicsScience
- 2010

The behavior of the artificial atom, a superconducting macroscopic two-level system, is in a quantitative agreement with the predictions of quantum optics for a pointlike scatterer interacting with the electromagnetic field in one-dimensional open space.

### Designing frequency-dependent relaxation rates and Lamb shifts for a giant artificial atom

- Physics
- 2014

In traditional quantum optics, where the interaction between atoms and light at optical frequencies is studied, the atoms can be approximated as pointlike when compared to the wavelength of light. So…

### Strong coupling of a single photon to a superconducting qubit using circuit quantum electrodynamics

- PhysicsNature
- 2004

It is shown that the strong coupling regime can be attained in a solid-state system, and the concept of circuit quantum electrodynamics opens many new possibilities for studying the strong interaction of light and matter.

### Superconducting qubit–oscillator circuit beyond the ultrastrong-coupling regime

- Physics
- 2017

A circuit that pairs a flux qubit with an LC oscillator via Josephson junctions pushes the coupling between light to matter to uncharted territory, with the potential for new applications in quantum…

### Decoherence-Free Interaction between Giant Atoms in Waveguide Quantum Electrodynamics.

- PhysicsPhysical review letters
- 2018

This work shows that the giant atoms can be protected from decohering through the waveguide, but still have exchange interactions mediated by the wave guide, and shows how this decoherence-free interaction can be designed in setups with multiple atoms to implement, e.g., a 1D chain of atoms with nearest-neighbor couplings or a collection of atom with all-to-all connectivity.

### Photon-Mediated Interactions Between Distant Artificial Atoms

- PhysicsScience
- 2013

Using a system of two separate superconducting qubits in a microwave transmission line, it is shown how the interaction between the two qubits can be controlled and mediated by electromagnetic modes, illustrating a feasible route to probing the complexity of many-body effects that may otherwise be difficult to realize.

### Microwave quantum optics with an artificial atom in one-dimensional open space

- Physics
- 2013

We address recent advances in microwave quantum optics with artificial atoms in one-dimensional (1D) open space. This field relies on the fact that the coupling between a superconducting artificial…

### Quantum Optics with Giant Atoms—the First Five Years

- Physics
- 2019

In quantum optics, it is common to assume that atoms can be approximated as point-like compared to the wavelength of the light they interact with. However, recent advances in experiments with…

### Beyond spontaneous emission: Giant atom bounded in the continuum

- Physics
- 2020

The quantum coupling of individual superconducting qubits to microwave photons leads to remarkable experimental opportunities. Here we consider the phononic case where the qubit is coupled to an…