Researchers from Tokyo Tech have developed a highly sensitive diamond quantum magnetometer based on CW-ODMR that enables magnetoencephalography (MEG) under practical ambient condition. This diamond quantum magnetometer, which utilizes nitrogen-vacancy (NV) centers, can achieve millimeter-scale resolution MEG and is expected to enable MEG imaging without the need for magnetic shielding room.

Recently, a research team led by the University of Chicago Pritzker School of Molecular Engineering has created a "quantum optical antenna" using germanium vacancy centers in diamonds. This antenna can provide up to six orders of magnitude of optical signal enhancement, achieving performance that is difficult for conventional antennas to match. The researchers said that this technology can be activated with only nanowatts of energy, without the effects of bleaching, heating, and background fluorescence caused by excessive light, and it does not dissipate energy during use.

Recently, a team at the Technical University Darmstadt in Germany has demonstrated for the first time a magnetometer based on a two-dimensional array of ultracold atoms with superior spatial resolution compared to classical devices. In this study, scientists trapped rubidium atoms in a square array with a width of 0.2 millimeters. They found that when this system is exposed to a magnetic field, it can detect spatial variations in the magnetic field, as each atom of the array acts as a separate sensor.

Recently, the Fermi National Accelerator Laboratory in the United States announced the establishment of a new Quantum Sensing and Computing Research Center named "QUIET," located 100 meters underground, along with a twin laboratory named "LOUD" on the surface. According to reports, Fermilab aims to directly compare the performance of quantum sensors in environments with reduced cosmic ray interference underground versus surface conditions through controlled experiments.

British scientists have successfully integrated the world’s tiniest quantum light detector onto a silicon chip. These types of detectors are called homodyne detectors, have a circuit size of 80 micrometers by 220 micrometers, and can operate at room temperature. It is expected to become a crucial component in various quantum communication, quantum sensing, and quantum computing devices.