New work by two researchers at HP Laboratories Bristol sets out to solve one of the major difficulties in quantum computer architectures that use directly interacting qubits.
The problem is that the million-or-so qubits necessary to do useful calculations in a quantum computer would all feel the presence of each other, meaning that the information would leak in an uncontrollable way. The more qubits that are put together this way, the harder it is to control them.
The solution put forward by Dr Sean Barrett and Dr Pieter Kok, working at HP Laboratories Bristol, is to put every qubits in its own box, so that they cannot directly talk to each other. However, for quantum computing to work, there does need to be some interaction between qubits so that they can become entangled. In the HP Labs system this is achieved by using the fact that every qubit can emit light particles (photons).
Julian Richards | alfa
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