View Full Version : Dressed atoms get to be qubits for longer, show promise for quantum computing

10-07-12, 04:00 PM
http://cdn.arstechnica.net/wp-content/uploads/2012/10/quantum-storage-640x853.jpg LBL.gov (http://newscenter.lbl.gov/news-releases/2008/10/23/news-bits-about-qubits-scientists-store-and-retrieve-data-inside-an-atom/)

I seem to write a lot of articles about quantum computing. You might even think I was obsessed or something. But, I believe that, once we have a useful quantum computer, it will be one of those technologies that we wonder how we ever did without. And by we, I mean scientists. One of the big applications for quantum computers is to solve quantum mechanical problems. And quantum problems are things like the properties of molecules, solids, and liquids.

Without a quantum computer, we will never really know what is possible in terms of new materials. But, to make a quantum computer possible, we need a quantum bit (qubit) that can be protected from unwanted disruptions. To make this possible, a group of researchers from the University of Science and Technology in China have shown (http://dx.doi.org/10.1103/PhysRevLett.109.070502) that dressing an atom may be the way to go.

I'm sorry, we only allow dressed states in here

To understand what the researchers have done, we need to know what a dressed state is. From a physicist's point of view, an atom is simply a set of energy states. An atom can absorb certain, discrete amounts of energy, depending its current state. On absorbing energy, the atom enters an excited state, and some time later, emits a photon and changes state again. The states it changes between are natural energy states of the atom.

Read 14 remaining paragraphs (http://arstechnica.com/science/2012/10/dressed-atoms-get-to-be-qubits-for-longer-show-promise-for-quantum-computing/) | Comments (http://arstechnica.com/science/2012/10/dressed-atoms-get-to-be-qubits-for-longer-show-promise-for-quantum-computing/?comments=1#comments-bar)

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