Nonexponential decay of a giant artificial atom

Abstract

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 atomic dimensions. In contrast, here we experimentally demonstrate the vastly different giant atom regime, where an artificial atom interacts with acoustic fields with wavelength several orders of magnitude smaller than the atomic dimensions. This is achieved by coupling a superconducting qubit to surface acoustic waves at two points with separation on the order of 100 wavelengths. This approach is comparable to controlling the radiation of an atom by attaching it to an antenna. The slow velocity of sound leads to a significant internal time-delay for the field to propagate across the giant atom, giving rise to non-Markovian dynamics. We demonstrate the non-Markovian character of the giant atom in the frequency spectrum as well as nonexponential relaxation in the time domain.

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• Mechanism of decoherence-free coupling between giant atoms
• Nonreciprocal and chiral single-photon scattering for giant atoms
• Giant Atoms in a Synthetic Frequency Dimension
• Giant spin ensembles in waveguide magnonics
• Electrical Control of Surface Acoustic Waves
• Beyond Spontaneous Emission: Giant Atom Bounded in Continuum
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• Coherent single-photon scattering spectra for a giant-atom waveguide-QED system beyond dipole approximation
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• Giant atoms with time-dependent couplings
• Manipulating single-photon transport in a waveguide-QED structure containing two giant atoms
• Chiral and nonreciprocal single-photon scattering in a chiral-giant-molecule waveguide-QED system
• Complex decoherence-free interactions between giant atoms
• Interaction between giant atoms in a one-dimensional structured environment
• Single-photon nonreciprocal excitation transfer with non-Markovian retarded effects
• Generation of two-giant-atom entanglement in waveguide-QED systems
• Quantum erasure using entangled surface acoustic phonons
• Entanglement preparation and non-reciprocal excitation evolution in giant atoms by controllable dissipation and coupling
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• Observing information backflow from controllable non-Markovian multi-channels in diamond
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• Single photon scattering from a chain of giant atoms coupled to a one-dimensional waveguide
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• Phononic loss in superconducting resonators on piezoelectric substrates
• Thermal Modulation of Gigahertz Surface Acoustic Waves on Lithium Niobate
• Correlated two-photon scattering in a one-dimensional waveguide coupled to two- or three-level giant atoms
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• Probing the Non-exponential Decay Regime in Open Quantum Systems
• Quantum optics with giant atoms in a structured photonic bath
• A giant atom with modulated transition frequency
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• Exact Quantum Dynamics in Structured Environments
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• Atom-photon dressed states in a waveguide-QED system with multiple giant atoms
• Single-photon scattering in giant-atom topological-waveguide-QED systems
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• Chiral coupling between a ferromagnetic magnon and a superconducting qubit
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• Controlling photons by phonons via giant atom in a waveguide QED setup
• Engineering symmetry-selective couplings of a superconducting artificial molecule to microwave waveguides
• Entangling two giant atoms via a topological waveguide
• Signature of exceptional point phase transition in Hermitian systems
• Tunable photon-photon correlations in waveguide QED systems with giant atoms
• Circuit QED with a Giant Atom Coupling to Left-handed Superlattice Metamaterials
• Simulating Photosynthetic Energy Transport on a Photonic Network
• Controllable optical response and tunable sensing based on self interference in waveguide QED systems
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• Local and non-local two-electron tunneling processes in a Cooper pair splitter
• Simulating open quantum systems with giant atoms
• Thin film aluminum nitride surface acoustic wave resonators for quantum acoustodynamics
• Quantum non-Markovian collision models from colored-noise baths
• Tunable coupling of a quantum phononic resonator to a transmon qubit with flip-chip architecture
• Giant-cavity-based quantum sensors with enhanced performance
• Coherent Control of Collective Spontaneous Emission through Self-interference
• Nearly quantum-limited Josephson-junction Frequency Comb synthesizer
• Intermediate Times Dilemma for Open Quantum System: Filtered Approximation to The Refined Weak Coupling Limit
• Dressed Interference in Giant Superatoms: Entanglement Generation and Transfer
• Diagrammatic Approach to Scattering of Multi-Photon States in Waveguide QED
• Fundamental causal bounds of quantum random access memories
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• Exact dynamics and bound states of a cavity coupled to a two-dimensional reservoir
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• Nonreciprocity enhanced Quantum Gyroscopes based on Surface Acoustic Waves
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