30 October 2012
A quantum computer's bits, qubits, can be recycled so that the same powerful calculations can be performed with a fraction of the resources.
Image by Enrique Martín-López
Paper: Integrated compact optical vortex beam emitters, Xinlun Cai, Jianwei Wang, Michael J Strain, Benjamin Johnson-Morris, Jiangbo Zhu, Marc Sorel, Jeremy L O’Brien, Mark G Thompson, Siyuan Yu, Science, 19 October 2012.
A research team from the University of Bristol’s Centre for Quantum Photonics (CQP) have brought the reality of a quantum computer one step closer by experimentally demonstrating a technique for significantly reducing the physical resources required for quantum factoring. The team have shown how it is possible to recycle the particles inside a quantum computer, so that quantum factoring can be achieved with only one third of the particles originally required. The research is published in the latest issue of Nature Photonics. More at Quantum computing with recycled particles.
Paper: Experimental realization of Shor’s quantum factoring algorithm using qubit recycling, Enrique Martín-López, Anthony Laing, Thomas Lawson, Roberto Alvarez, Xiao-Qi Zhou and Jeremy L O’Brien, Nature Photonics, 21 October 2012.