@informaq.bsky.socialWe demonstrate SI-traceable calibration of commercial THz photomixer systems at 204 GHz using Rydberg atomic electrometry, establishing absolute field measurements and benchmarking receiver sensitivity performance against atom-based standards.
@informaq.bsky.socialDemonstrated co-design framework optimizes cavity modes for simultaneous multifrequency Rydberg atom sensing, achieving 100x device compaction and 10-40x better frequency matching than conventional methods through SPSA-Adam optimization.
@informaq.bsky.socialSandboxAQ completed the first reported test of magnetic navigation technology on an attritable drone, demonstrating unjammable positioning without GPS in contested environments.
@informaq.bsky.socialResearchers achieved simultaneous high spatial and temporal resolution for mapping magnetic fluctuations in materials using diamond nitrogen vacancy centre ensembles, overcoming previous limitations.
@informaq.bsky.socialSingular Photonics introduces the Litavis SPAD image sensor, leveraging single-photon avalanche diode technology for enhanced quantum sensing and photonic imaging applications.
@informaq.bsky.socialFinite-energy GKP states can outperform squeezed vacuum in interferometry under specific conditions (∆<0.3282), but at equal mean photon number, squeezed vacuum maintains the advantage. Optical loss reduces both states' relative advantage asymptotically.
@informaq.bsky.socialUniversal relations discovered between quantum Fisher information metrics and work performed on thermal probes reveal counterintuitive heating advantage for quantum sensing precision with quadratic signals.
@informaq.bsky.socialNovel quantum Barankin bound based on right-division operators provides closed-form Gaussian state formulas and reveals tighter precision limits in few-shot quantum sensing—capturing threshold effects the standard Cramér-Rao bound misses.
@informaq.bsky.socialNew five-year MEAD program will use atomic-scale doping and isotopic engineering to create advanced materials for quantum sensors, secure communications, and computing. Aims to bridge laboratory innovation and commercial deployment.
@informaq.bsky.socialStudy reveals how environmental coupling fundamentally alters quantum sensing precision through a dynamical crossover in the spin-boson model, with temperature and energy relaxation regularizing sensitivity in realistic conditions.
@informaq.bsky.socialSandboxAQ successfully demonstrates quantum-enabled GPS-free navigation on a Northrop Grumman drone, advancing quantum sensing capabilities for autonomous defense applications.
@informaq.bsky.socialSolution-phase fluorination of nanodiamonds achieves ~90% NV⁻ fraction—among the highest reported—using mild, scalable chemistry. Two complementary routes (Balz–Schiemann and XeF₂) stabilize nitrogen-vacancy centers for quantum sensing applications.
@informaq.bsky.socialQuantum sensors using laser-cooled atoms can now serve as primary pressure standards in ultra-high vacuum, eliminating calibration needs and achieving <1% accuracy through quantum mechanics alone.
@informaq.bsky.socialTwin-field sensors combining two systems with opposite detunings saturate quantum measurement limits using simple photon counting or homodyne detection, outperforming conventional single-field approaches across diverse platforms.
@informaq.bsky.socialCavity magnonics evolves beyond polariton physics: engineered dissipation, Floquet driving, and parametric techniques enable quantum state preparation, enhanced sensing, and nonreciprocal transport in hybrid magnon systems.
@informaq.bsky.socialSqueezed microwaves recover magnetic-field information lost during qubit readout, improving superconducting-qubit magnetometer sensitivity by 27.3% through suppressed state-assignment errors in the measurement stage.
@informaq.bsky.socialNV-center quantum sensors combined with digital lock-in amplification achieve 126 nT/Hz^1/2 magnetic field sensitivity and sub-second full-field imaging, enabling rapid non-destructive testing and fault diagnosis of RF devices.
@informaq.bsky.socialFloquet eigenstate analysis reveals how RF-driven Rydberg atoms undergo state mixing and coupling, explaining avoided crossing structures through detailed examination of dressed-state dynamics and intermediate coupling pathways.
@markeatherly.bsky.socialTime-Reversal and Reversible Dynamics in Cavity QED for Quantum Metrology
Quantum-enhanced metrology relies on entanglement to achieve sensitivities beyond the standard quantum limit.
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