Interacting Qubit-Photon Bound States with Superconducting Circuits

Abstract

Qubits strongly coupled to a photonic crystal give rise to many exotic physical scenarios, beginning with single and multi-excitation qubit-photon dressed bound states comprising induced spatially localized photonic modes, centered around the qubits, and the qubits themselves. The localization of these states changes with qubit detuning from the band-edge, offering an avenue of in situ control of bound state interaction. Here, we present experimental results from a device with two qubits coupled to a superconducting microwave photonic crystal and realize tunable on-site and inter-bound state interactions. We observe a fourth-order two photon virtual process between bound states indicating strong coupling between the photonic crystal and qubits. Due to their localization-dependent interaction, these states offer the ability to create one-dimensional chains of bound states with tunable and potentially long-range interactions that preserve the qubits' spatial organization, a key criterion for realization of certain quantum many-body models. The widely tunable, strong and robust interactions demonstrated with this system are promising benchmarks towards realizing larger, more complex systems of bound states.

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• Avoiding decoherence with giant atoms in a two-dimensional structured environment
• Dynamics of Matter-Wave Quantum Emitters in a Structured Vacuum
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• Exact Quantum Dynamics in Structured Environments
• Emergence of solitons from many-body photon bound states in quantum nonlinear media
• Microwave transmission through an artificial atomic chain coupled to a superconducting photonic crystal
• Bath engineering of a fluorescing artificial atom with a photonic crystal
• Optical properties of a waveguide-mediated chain of randomly positioned atoms
• Atom-photon dressed states in a waveguide-QED system with multiple giant atoms
• Nondestructive photon counting in waveguide QED
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• Signature of exceptional point phase transition in Hermitian systems
• Engineering symmetry-selective couplings of a superconducting artificial molecule to microwave waveguides
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• Analytical approach to higher-order correlation functions in U(1) symmetric systems
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• Fermionic matter-wave quantum optics with cold-atom impurity models
• Tunable photon scattering by an atom dimer coupled to a band edge of a photonic crystal waveguide
• Photon-mediated dipole-dipole interactions as a resource for quantum science and technology in cold atoms
• Waveguide QED with dissipative light-matter couplings
• Undamped Rabi oscillations due to polaron-emitter hybrid states in non-linear photonic wave guide coupled to emitters
• Engineering photonic band gaps with a waveguide-QED structure containing an atom-polymer array
• Remote Individual Addressing of Quantum Emitters with Chirped Pulses
• Dynamical excitation control and multimode emission of an atom-photon bound state
• Light-Matter interactions in Hofstadter lattice with the next-nearest neighbor couplings
• Enhancing strength and range of atom-atom interaction in a coupled-cavity array via parametric drives
• Improving quantum state transfer: Correcting non-Markovian and distortion effects
• Photon-induced droplet-like bound states in one-dimensional qubit array
• Efficient tensor network simulation of multi-emitter non-Markovian systems
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• Spontaneous superradiant photon current
• Resonant cavity-QED with chiral flat bands
• Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir
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• Many-body quantum dimerization in 2D atomic arrays
• Oscillating bound states in waveguide-QED system with two giant atoms
• Chaos and quantum regimes in $n$-photon driven, dissipative bosonic chains
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• Ultimate quantum limit for amplification: a single atom in front of a mirror