Issues
Readers’ Forum
Search and Discovery
Cooling molecules the optoelectric way
In a newly implemented technique, the complex rotational and vibrational motions of molecules are not a hindrance but a help.
Droplets deform in a solid at high voltage
The first observations of shape-shifting droplets in a rubbery polymer reveal the connection between fluid instabilities and dielectric breakdown.
A liquid ground state for 2D helium-3?
New experiments hint at what could be the lowest-density liquid ever found in nature.
Issues and Events
Russia launches S&T university
The top-down initiative aims to be interdisciplinary and international and to breed entrepreneurship.
Articles
Norman Ramsey and his method
While searching for a way to boost the resolution of an atomic spectrometer, Ramsey hit on a simple solution: Replace a single oscillating magnetic field with two separated ones.
Atomic clocks for controlling light fields
Norman Ramsey’s interferometer has matured into a tool that can nondestructively detect the birth and death of single photons, prepare photon number states via feedback loops, and entangle atoms and photons into Schrödinger-cat states.
The method of successive oscillatory fields
An extension of Rabi’s molecular-beam resonance method, originally devised for measuring nuclear magnetic moments, is proving useful also for microwave spectroscopy, masers and lasers.
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Quick Study
Carried by impulse: The physics of water jetpacks
A jetpack can suspend a pilot in midair, in a way reminiscent of a magic carpet. But the magic is all in mechanical forces that can be readily estimated.