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… 

Figures and Tables from this paper

Waveguide quantum electrodynamics with superconducting artificial giant atoms

An alternative architecture is used that realizes a giant atom by coupling small atoms to a waveguide at multiple, but well separated, discrete locations, producing tunable atom–waveguide coupling and enabling decoherence-free interactions.

Topology-Controlled Nonreciprocal Photon Scattering in a Waveguide

Waveguide quantum electrodynamics with multiple atoms provides an important way to study photon transport. In this work, we study the photon transport in a one-dimensional waveguide coupled to a

Quantum Optics with Giant Atoms—the First Five Years

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

Synthesizing electromagnetically induced transparency without a control field in waveguide QED using small and giant atoms

The absorption of photons in a three-level atom can be controlled and manipulated by applying a coherent drive at one of the atomic transitions. The situation where the absorption is fully canceled,

Ultimate quantum limit for amplification: a single atom in front of a mirror

We investigate three types of amplification processes for light fields coupling to an atom near the end of a one-dimensional (1D) semi-infinite waveguide. We consider two setups where a drive creates

Mechanism of decoherence-free coupling between giant atoms

Giant atoms are a new paradigm of quantum optics going beyond the usual local coupling. Building on this, a new type of decoherence-free (DF) many-body Hamiltonians was shown in a broadband

Diagrammatic approach to scattering of multiphoton states in waveguide QED

We give an exposure to diagrammatic techniques in waveguide QED systems. A particular emphasis is placed on the systems with delayed coherent quantum feedback. Specifically, we show that the N

Tunable Chiral Bound States with Giant Atoms.

Tunable chiral bound states in a system composed of superconducting giant atoms and a Josephson photonic-crystal waveguide (PCW) can be used as a tunable toolbox to realize topological phase transitions and quantum simulations.

Deterministic loading and phase shaping of microwaves onto a single artificial atom

Loading quantum information deterministically onto a quantum node is an important step towards a quantum network. Here, we demonstrate that coherent-state microwave photons, with an optimal temporal

Optical multi-Fano-like phenomena with giant atom–waveguide systems

Coupling between giant atoms and waveguides is expected to be of great importance in the field of quantum information science. In this paper, we study the influence of frequency detuning between

References

SHOWING 1-10 OF 56 REFERENCES

Non-exponential decay of a giant artificial atom

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

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

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

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

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.

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

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

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

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

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
...