Quantum Computers Within Reach: Construction of Practical Quantum Computers Radically Simplified
Quantum computers could solve certain problems – that would take the fastest supercomputer millions of years to calculate – in just a few milliseconds. They have the potential to create new materials and medicines, as well as solve long-standing scientific and financial problems.
A trapped-ion quantum computer would consist of an array of X-junctions with quantum bits formed by individual ions that are trapped above the surface of the quantum chip (shown in grey). Individual quantum bits are manipulated simply by tuning voltages as easy as tuning a radio to different stations. Applying voltage V1 results in no quantum operation (blue zones), applying voltage V2 results in a quantum operation on a single quantum bit (green zones), applying voltage V3 results in a quantum operation ‘entangling’ two quantum bits (red zones). An arbitrary large quantum computer can be constructed based on this simple-to engineer approach.
Credit: University of Sussex
Instead, scientists at Sussex have invented a simple method where voltages are applied to a quantum computer microchip (without having to align laser beams) – to the same effect.
Professor Winfried Hensinger (left) and Dr. Seb Weidt (right) working on the experiment that was used to validate their ground-breaking new approach by producing an ‘entangled’ quantum state of two ions with extremely low error rate.
Credit: University of Sussex
Professor Hensinger said: “This development is a game changer for quantum computing making it accessible for industrial and government use. We will construct a large-scale quantum computer at Sussex making full use of this exciting new technology.”
A popular science lecture given by Prof. Hensinger explaining the principles of quantum computing
Contacts and sources:
Julia Harris
University of Sussex
Source: http://www.ineffableisland.com/2016/12/quantum-computers-within-reach.html
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