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Measuring entanglement without destroying it on commercial quantum computers
In quantum mechanics, the act of measurement produces unavoidable perturbation (also called “back-action”) on the state of the measured system. This effect is, in many cases, not desirable, as back-action often limits the precision of repeated measurements. However, so-called Quantum Non-Demolition (QND) measurements ensure that the unavoidable and deleterious back-action is diverted onto other system (…)
Molecular device turns infrared into visible light
Our group, in collaboration with Wuhan Institute of Technology, the Valencia Polytechnic University, and AMOLF in the Netherlands, has now developed a new way to detect infrared light by changing its frequency to that of visible light. The device can extend the “sight” of commonly available and highly sensitive detectors for visible light far into (…)
Green light on gold atoms
Our group discovered that laser-driven rearrangement of just a few gold atoms inside nanoscale antennas can be observed by the naked eye.Because individual atoms or molecules are 100 to 1000 times smaller than the wavelength of visible light, it is notoriously difficult to collect information about their dynamics, especially when they are embedded within larger (…)