Physicists at the University of Bonn build quantum data memory
Physicists from the University of Bonn have succeeded in taking a decisive step forward towards processing quantum information with neutral atoms: in the latest issue of the ’Physical Review Letters’ vol. 93 (2004) they describe how they managed to set up a quantum register experimentally. Their next aim is to construct a quantum gate in which two or more atoms interact with each other in a controlled way. By combining the register and gate there would then be all the basic components available for developing a quantum computer with neutral atoms.
Registers are the central memory of a computer. They consist of a series of elementary information cells which can each take one bit of information, i.e. a logical zero or one. In a register of eight bits’ length, for example, a number between 0 and 255 can be stored – the 255 corresponds to a series of eight bits with the state of 1. In order to add two numbers three registers are normally required: two for the two addends and one more for the result.
Dominik Schrader | EurekAlert!
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