Eryn C. Cook, Paul J. Martin, Tobias L. Brown-Heft, Jeffrey C. Garman, and Daniel A. Steck We present the design and performance characterization of an external-cavity diode-laser system optimized for high stability, low passive spectral linewidth, low cost, and ease of in-house assembly.
Pulsars, which already have produced two Nobel Prizes, are providing scientists with unique insights on topics from particle physics to General Relativity.
What's the world coming to? With all of the PhDs America produces, pretty soon law enforcement will be limited to officers with graduate degrees in quantum physics - but for now, Newton is still all it takes. Well, usually. Sometimes even the laws of physics are not what they look like.
Uncertainty affects the accuracy with which measurements can be made in quantum physics. To reduce this uncertainty, physicists have learned to "squeeze" certain measurements. Researchers are now reporting a new type of measurement that can be squeezed to improve precision.
At 00:38 CEST this morning, the LHC shift crew declared ‘stable beams’ as two 4 TeV proton beams were brought into collision at the LHC’s four interaction points. This signals the start of physics data taking by the LHC experiments for 2012. The collision energy of 8 TeV is a new world record, and increases the machine’s discovery potential considerably.
Researchers have succeeded in combining the power of quantum computing with the security of quantum cryptography and have shown that perfectly secure cloud computing can be achieved using the principles of quantum mechanics. They have performed an experimental demonstration of quantum computation in which the input, the data processing, and the output remain unknown to the quantum computer.
Author(s): Mark G. Jackson and Koenraad SchalmWe compute the universal generic corrections to the inflationary power spectrum due to unknown high-energy physics. We arrive at this result via a careful integrating out of massive fields in the “in-in” formalism yielding a consistent and predictive low-energy effective description in time-dependen...
Well, this is some very welcome and happy news: NASA’s 2012 Senior Review for Operating Missions has recom
(Centre for Quantum Technologies at the National University of Singapore) Researchers have discovered a new way in which computers based on quantum physics could beat the performance of classical computers. The work, by researchers based in Singapore and the UK, implies that a Matrix-like simulation of reality would require less memory on a quantum computer than on a classical computer.
The biological functions of coiled coils generally depend on efficient folding and perfect pairing of their α-helices. Dynamic changes in the helical registry that lead to staggered helices have only been proposed for a few special systems and not found in generic coiled coils. Here, we report our observations of multiple staggered helical structures of two canonical coiled coils.