Research Areas - (169) Quantum Optics

Full path: Physics > Quantum Optics

Department(s)/lab(s): School of Physics | Combes Quantum Measurement Theory Group @ UMelb
Summary:

Combes is a theorist of continuous quantum measurement, quantum trajectories, quantum-limited amplification and quantum filtering, with a strong record of working directly alongside superconducting-circuit and optical experiments rather than in isolation. Recent directions include the fundamental limits of amplifier-based sensing, error-corrected and adaptive metrology protocols, and characterisation/verification of noisy quantum devices. 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 supplies the estimation-theoretic scaffolding β€” quantum Fisher information, back-action limits, adaptive protocols β€” that determines whether an NV ensemble running DEER or nanoscale NMR at pT/sqrt(Hz) is actually operating at its fundamental bound or leaving sensitivity on the table. Theory PI, but explicitly experiment-facing.

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Department(s)/lab(s): Physics (LKB) | Optomechanics and Quantum Measurements Team @ ENS Paris
Summary:

Courty provides theoretical support to LKB's optomechanics and quantum-measurement experiments, working on quantum-noise theory for radiation-pressure coupled cavities and standard-quantum-limit-evading measurement schemes.

Department(s)/lab(s): School of Physics | Superconducting Quantum Circuits Laboratory @ USyd
Summary:

Croot returned from Princeton to found Sydney's Superconducting Quantum Circuits Laboratory. The programme uses superconducting circuits both as quantum processors and as extremely sensitive probes: coupling microwave resonators and qubits to other degrees of freedom (mechanical modes, semiconductor structures, spins) to build hybrid systems, and developing the quantum-limited amplification chain that makes single-microwave-photon detection possible. 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€” superconducting circuits are the principal competitor technology for detecting the weak microwave signals that NV ensembles read magnetically; a quantum-limited or squeezed microwave amplifier is what lets an inductively-detected spin ensemble reach β€” and beat β€” the pT/sqrt(Hz) regime. Newly established, well-equipped lab; high autonomy for a postdoc and active recruitment as the lab builds out.

Department(s)/lab(s): Physics / LKB / Collège de France | Bose-Einstein Condensates (Dalibard/Yefsah) @ ENS Paris
Summary:

Jean Dalibard's BEC group at LKB studies quantum gases, BEC, and strongly correlated quantum systems. Research: (1) 2D Bose gases and Berezinskii-Kosterlitz-Thouless transition; (2) gauge fields for neutral atoms — synthetic magnetism; (3) quantum simulation with ultracold atoms. Dalibard is a foundational figure in cold-atom physics; his group at LKB/Collège de France is relevant through quantum gas experiments tied to quantum simulation and precision measurement. Borderline case included given BEC foundations for sensing.

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Department(s)/lab(s): Physics and Astronomy | Quantum Theory and Technology (De Liberato) @ Southampton
Summary:

Simone De Liberato's Quantum Theory and Technology group explores quantum electrodynamics in semiconductor systems. Research: (1) ultrastrong and deep-strong light-matter coupling in polariton and circuit QED systems; (2) mid-infrared polariton physics with potential sensing applications; (3) virtual photon condensation and vacuum fluctuations in quantum materials; (4) positronium density measurements using polaritonic effects. Relevant to quantum sensing via strong coupling platforms.

Department(s)/lab(s): Institut des NanoSciences de Paris (INSP) | Quantum Imaging Paris @ Sorbonne
Summary:

Defienne leads the Quantum Imaging Paris group at INSP, using spatial correlations and Hong-Ou-Mandel-type interference between entangled photon pairs to build microscopes that see through scattering media and correct optical aberrations without a spatial light modulator. His ERC-funded CORAMI project develops correlation-based adaptive optics as a universal add-on module for existing microscopes, targeting deeper (>1 mm), higher-contrast in-vivo imaging for neuroscientists, dermatologists, and ophthalmologists.

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Department(s)/lab(s): Physics (LKB) | Optomechanics and Quantum Measurements Team @ ENS Paris
Summary:

Deleglise works on cavity optomechanics and microwave-to-optical photon transduction, aiming to coherently interconnect superconducting-circuit and optical-photon quantum-network nodes; he is also affiliated with LPENS' Quantic team on circuit-QED and bosonic-code quantum error correction.

Department(s)/lab(s): Physics (LKB) | Rydberg Atoms Team @ ENS Paris
Summary:

Dotsenko is a permanent member of LKB's Rydberg-atom cavity-QED team (successor to Haroche/Brune's circular-Rydberg-atom programme), using long-lived circular Rydberg states strongly coupled to microwave photons in high-Q cavities for quantum non-demolition measurement, entanglement generation, and microwave-photon-number quantum sensing.

Department(s)/lab(s): School of Physics / Institute of Photonics and Optical Science | Eggleton Research Group @ USyd
Summary:

Eggleton directs the Institute of Photonics and Optical Science and runs one of the world's leading groups on stimulated Brillouin scattering in integrated photonic circuits β€” the coherent interaction of light with GHz acoustic phonons in a chalcogenide or silicon waveguide. The consequences are a chip-scale microwave photonic toolbox (ultra-narrowband filters, true time delay, RF spectral analysis), photon-phonon memory, and, through the Jericho Smart Sensing Laboratory, translation into deployed sensing platforms. 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€” Brillouin optomechanics is a distinct route to the same goal β€” reading a weak signal out of a high-Q, low-loss resonator at the quantum noise floor β€” and the group's phonon-photon coupling is strong enough that quantum optomechanical operation is now within reach. Very large, very well-resourced group with extensive industry and defence funding; a candidate would be one of many.

Department(s)/lab(s): Physics | MIT LIGO Laboratory @ MIT
Summary:

PREFERRED. Evans leads work on frequency-dependent squeezed-light injection and low-thermal-noise optics that has pushed Advanced LIGO below the standard quantum limit across its full detection band, and he leads the US design effort for the next-generation Cosmic Explorer gravitational-wave observatory. This is squarely quantum-enhanced sensing at a fundamental-physics facility scale rather than a device-fabrication program.