Long-lived quantum correlation by cavity-mediated subradiance
arXiv:2412.09252 · doi:10.1038/s41467-025-61629-w
Abstract
Cooperative effects such as super(sub)radiance in quantum systems arise from the interplay among quantum emitters. While bright superradiant states have been extensively studied and yielded significant insights into cooperative phenomena, subradiant states have remained less explored due to their inherently dark state nature. However, subradiance holds significant potential as valuable quantum resources that exploit long-lived and large-scale entanglement, which is a key for advancing quantum information technologies. Here, we demonstrate a long-lived subradiant state among multiple quantum emitters coupled to a directional low Q cavity. In a tailored photonic environment with balanced cavity dissipation, emitter-field coupling strength, and incoherent pumping, two coupled quantum dots exhibit a steady-state population in a subradiant state with highly negative cooperativity. As an important hallmark of a subradiant state, the system shows large photon bunching (g^((2))(0)>>2) and suppressed single-photon decay. In addition, controlling the excitation wavelength provides a useful tool for manipulating dephasing and the number of coupled emitters, which leads to significant changes in photon statistics. Our approach to inducing cavity-mediated subradiance paves the way for creating and harnessing quantum correlations in quantum emitters via a long-lived entangled quantum state, essential for quantum storage and metrology.
In the manuscript, 16 pages and 4 figures. In supplementary, 6 pages and 7 figures
References in corpus (30)
- Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
- Superfluorescence from Lead Halide Perovskite Quantum Dot Superlattices
- Superradiance for atoms trapped along a photonic crystal waveguide
- Subradiance in a Large Cloud of Cold Atoms
- Nonlinear optical signals and spectroscopy with quantum light
- Observation of Dicke Superradiance for Two Artificial Atoms in a Cavity with High Decay Rate
- Super-radiance reveals infinite-range dipole interactions through a nanofiber
- Storing light with subradiant correlations in arrays of atoms
- Scalable in operando strain tuning in nanophotonic waveguides enabling three-quantum dot superradiance
- Collective super- and subradiant dynamics between distant optical quantum emitters
- Coherent control of a symmetry-engineered multi-qubit dark state in waveguide quantum electrodynamics
- Observation of room-temperature spontaneous superradiance from single diamond nanocrystals
- Universal Quantum Computation in Waveguide QED using Decoherence Free Subspaces
- Super-radiant emission from quantum dots in a nanophotonic waveguide
- Exciting polaritons with quantum light
- Generation of maximally-entangled long-lived states with giant atoms in a waveguide
- Few emitters in a cavity: From cooperative emission to individualization
- Enhanced two-photon absorption using true thermal light
- Tailoring the degree of entanglement of two coherently coupled quantum emitters
- Protected state enhanced quantum metrology with interacting two-level ensembles
- Coherent single-atom superradiance
- Selective protected state preparation of coupled dissipative quantum emitters
- Two-photon interference from independent cavity-coupled emitters on-a-chip
- Plug-and-play quantum devices with efficient fiber-quantum dot interface
- Coherence in Cooperative Photon Emission from Indistinguishable Quantum Emitters
- Superradiant and subradiant states in lifetime-limited organic molecules through laser-induced tuning
- Dynamic population of multiexcitation subradiant states in incoherently excited atomic arrays
- Harnessing quantum emitter rings for efficient energy transport and trapping
- Signatures of cooperative emission in photon coincidence: Superradiance versus measurement-induced cooperativity
- Dephasing-assisted entanglement in a system of strongly coupled qubits