Phys.org October 16, 2024 Quantum metrology takes advantage of quantum correlations to enhance the sensitivity of sensors and measurement techniques beyond their fundamental classical limit. The use of both temporal and spatial correlations present in quantum states of light can extend quantum-enhanced sensing to a parallel configuration that can simultaneously probe an array of sensors or independently measure multiple parameters. Researchers at the University of Oklahoma used multispatial-mode bright twin beams of light to probe a four-sensor quadrant plasmonic array. They showed that it is possible to independently and simultaneously measure local changes in refractive index for all four sensors […]
Tag Archives: Quantum imaging
Listening to quantum radio
Science Daily March 8, 2019 It becomes increasingly difficult to detect long-wavelength single photons because of thermal fluctuations in the background. Researchers in the Netherlands used a superconducting qubit to directly observe the quantization of radio-frequency electromagnetic fields stored in a photonic microresonator. They were then able to manipulate the quantum state of the radio-frequency field, forming one- and two-photon Fock states within the microresonator, and analyze how the system interacts dynamically with its environment. Extending circuit quantum electrodynamics approach could be used for fundamental studies in quantum thermodynamics and find practical application in imaging…read more. TECHNICAL ARTICLE