Tags - (9) QKD quantum communication

Department(s)/lab(s): Physics / QET Labs | Harbord Group (Bristol QET Labs) @ Bristol
Summary:

Edmund Harbord researches quantum communications, solid-state quantum optics, and topological photonic structures. Research: (1) single-photon sources based on solid-state emitters (quantum dots, colour centres); (2) topological photonic crystal structures for robust quantum light propagation; (3) quantum communication protocols. Bridges photonics engineering with quantum networking.

Department(s)/lab(s): Electrical Engineering / QET Labs | Joshi Group (Bristol QET Labs) @ Bristol
Summary:

Siddarth Joshi's group works on satellite-based quantum key distribution, quantum information protocols, and chip-scale quantum technologies. Research: (1) QKD receiver miniaturization for satellites and CubeSats; (2) chip-scale quantum random number generation and single-photon detection; (3) quantum metrology and sensing with photonic chips. Part of EPSRC Quantum Communications Hub.

Department(s)/lab(s): Physics and Astronomy | Hybrid Quantum Networks Lab (Ledingham) @ Southampton
Summary:

Patrick Ledingham's Hybrid Quantum Networks Lab develops light-matter interfaces for large-scale quantum photonic networks. Research: (1) warm and cold atomic ensemble quantum memories (ORCA protocol in warm Rb vapour) for telecom-wavelength photon storage; (2) atom-photon entanglement generation; (3) multiplexed quantum memories for repeater nodes. Key for quantum sensing via atom-photon entanglement and quantum repeater architectures.

Department(s)/lab(s): School of Electrical Engineering and Telecommunications | Malaney Quantum Communications Group @ UNSW
Summary:

Malaney works on quantum communications with an emphasis on the satellite channel: continuous- and discrete-variable QKD through atmospheric turbulence, entanglement distribution from space, and the use of Gaussian and squeezed states as the carriers. A distinct thread is quantum-enhanced sensing and localisation β€” quantum illumination and quantum radar β€” where entangled probe states are used to detect weakly-reflecting targets in noisy backgrounds. Positioned against the established body of NV-ensemble quantum sensing work β€” DEER, nanoscale NMR and T1 relaxometry protocols operating at pT/sqrt(Hz) field sensitivity β€” his work belongs to the nonclassical-light arm of the search: it addresses whether squeezing and entanglement can be preserved through a lossy channel well enough to deliver a real metrological advantage, which is the practical question that determines whether quantum-enhanced sensing can ever beat a well-engineered shot-noise-limited pT/sqrt(Hz) device. Largely theory/simulation with some experimental collaboration.

Techniques:
Department(s)/lab(s): LKB / ENS-PSL | LKB Quantum Tests with Hydrogen (Nez) @ ENS Paris
Summary:

FranΓ§ois Nez (DR CNRS, LKB Hydrogen Spectroscopy) performs ultra-high precision hydrogen spectroscopy and QED tests. Research: (1) 1S–3S hydrogen/deuterium spectroscopy β€” continuous-wave laser, optical frequency comb via REFIMEVE network, theory comparison at ppt level; (2) muonic hydrogen/atom spectroscopy β€” CREMA collaboration at PSI; determines proton charge radius with record precision; (3) GRASIAN β€” gravitational quantum states of hydrogen atoms and neutrons; probing short-range forces beyond Standard Model. Primarily fundamental physics rather than sensing applications, but uses precision optical metrology infrastructure.

Department(s)/lab(s): Physics and Astronomy | Quantum Nanophotonics Group (Politi) @ Southampton
Summary:

Alberto Politi's Quantum nanoPhotonics Lab develops photonic quantum technology platforms for quantum information and sensing. Research: (1) integrated quantum photonic circuits in silicon, glass, and diamond; (2) quantum simulation with integrated photonics; (3) single-photon sources coupled to nanophotonic waveguides (including hBN defect emitters). Part of UK Quantum Technology Hubs.

Department(s)/lab(s): LKB / Physics, Sorbonne UniversitΓ© | Atom Chips Group (Reichel/LKB) @ ENS Paris
Summary:

Jakob Reichel (Professor, LKB Atom Chips) leads work on fiber Fabry-Perot microcavities for atom-light quantum interfaces and miniaturised sensors. Research: (1) fiber Fabry-Perot microcavities β€” sub-micron mirrors on fibre tips enabling strong single-atom coupling; integrated directly into atom chips; (2) TACC (Trapped Atom Clock on a Chip) β€” Rb atom clock with 5.8Γ—10⁻¹³/βˆšΟ„ stability; ERC Advanced grant EQUEMI; (3) Sr optical-lattice cavity QED with quantum metrology; (4) MIREGA spinout β€” miniature portable greenhouse gas analyser combining FFP microcavities with telecom fibre optics for drone mounting; ERC Proof-of-Concept grant; (5) Rubidium CQED 'Sarocema' β€” individually addressable atom-tweezer array in fibre cavity for quantum simulation with long-range cavity-mediated interactions.

Department(s)/lab(s): Electrical Engineering and Computer Science | Optical and Quantum Communications Group @ MIT
Summary:

PREFERRED. Wong's research centers on quantum and nonlinear optics, particularly high-flux, high-purity polarization-entangled and pure-state single-photon sources (including the Sagnac-interferometer entanglement source later flown on a Chinese quantum-communication satellite) for quantum key distribution and quantum information processing. By his own account he is approaching retirement in the near future, so his continued availability for a postdoc search should be confirmed directly.

Department(s)/lab(s): Physics / QET Labs | Young Group (Bristol QET Labs) @ Bristol
Summary:

Andrew Young's group develops solid-state quantum photonic systems, focusing on deterministic single photon emitters and spin-photon interfaces. Research: (1) quantum dot and colour-centre emitters coupled to cavities and waveguides for near-unity efficiency; (2) spin-photon interfaces for quantum repeaters; (3) cavity quantum electrodynamics for quantum networking. Part of Quantum Communications Hub.