Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Real-time geopotential measurements with two synchronously linked optical lattice clocks are demonstrated. A height difference between the two clocks separated by 15 km is determined, with an uncertainty of 5 cm, by means of a gravitational redshift.
The violation of the no-signalling principle — information can be transmitted faster than light — is experimentally investigated using entangled photons. It can be simulated when the parity–time symmetrically evolved subspace is solely considered.
Cheap and sensitive gamma-ray detectors are desired for defence, medical and research applications. Solid-state gamma-radiation detectors made from solution-grown perovskites have now been demonstrated for multiple practical applications.
The complete spatiotemporal characterization of a 100-TW laser beam highlights distortions that must be taken into account for present and future generations of ultra-intense lasers.
The position of a single Yb atomic ion is determined with a minimum uncertainty of 1.7 nm for 0.2 s integration time — the highest position sensitivity reported to date for an isolated atom.
The local amplitude and phase of a single photon is retrieved using a method similar to classical holography. The interference of optical fields is replaced by the non-classical interference of spatially varying two-photon probability amplitudes.
Raman cooling and heating of a longitudinal optical phonon with a 6.23-THz frequency are observed in ZnTe nanobelts. The direction of the energy flow is changed by detuning the frequency of the pump laser.
Two-dimensional arrays of short-cavity surface-emitting THz quantum cascade lasers are phase-locked to each other via mutual coupling. A directive beam on the order of 10° divergence and a maximum slope efficiency of 450 mW A−1 is achieved.
Researchers demonstrate microwave phonon waveguide circuits and tunable delay and filter for microwave-photonics signals carried by 1,500 nm wavelength light.