Latest posts tagged with #WaveguideQED on Bluesky
Researchers at Univ. of Nottingham developed a Langevin-based optimal filter for waveguide QED 'giant cavities', achieving 15% better state estimation by accounting for non-Markovian delays and nonlocal coupling — enabling improved quantum feedback control.
#WaveguideQED #QuantumControl #News
Giant atom in waveguide QED enables phase-tunable switching of photon statistics between bunching, antibunching, and coherent regimes—each over finite phase bandwidth—via two competing scattering processes. Demonstrated feasible in superconducting circuits.
#WaveguideQED #QuantumPhotonics #Research
A 3-point coupling scheme for giant atoms in structured waveguides achieves CZ gate fidelity up to 97.7%, overcoming non-Markovian degradation seen in 2-point designs—expanding the universal gate set beyond iSWAP for scalable quantum simulation.
#QuantumGates #WaveguideQED #Research
DMI-coupled qubits in a nonchiral waveguide yield tunable nonreciprocal transmission, directional steady-state entanglement, and photon superbunching—enabling isolators and routers without chiral waveguides.
#WaveguideQED #QuantumNonreciprocity #Research
Higher-order mean-field & perturbative methods model photon correlations in chirally coupled atom arrays, reproducing experimental superradiance data and showing MF4+ is required to capture second-order coherence from full inversion.
#WaveguideQED #Superradiance #Research
Exact analytical solutions derived for photon statistics in waveguide QED (N→∞, fixed optical depth). Shows exponentially enhanced superradiance before t≈1.59τ, followed by subradiance, with second-order coherence requiring finite-size effects to emerge.
#WaveguideQED #Superradiance #QuantumOptics
Using MPS and frequency-space scattering theory, researchers show that photon localization in bimodal pulse envelopes dramatically alters two-photon nonlinear dynamics and transmitted correlation functions in single-atom waveguide-QED.
#WaveguideQED #QuantumPhotonics #Research
New optimal filter for giant cavity waveguide QED systems handles non-Markovian dynamics via delayed-state covariance matrices and interval-wise backward recursion, validated on coherent and Schrödinger cat states.
#WaveguideQED #QuantumControl #Research
