Scientists tame Schrodinger's cat for a new type of quantum computer

Scientists tame Schrӧdinger’s cat for a new type of quantum computer
Postdoctoral Fellow Dr Seb Weidt, PhD students Kim Lake and Joe Randall at work on the experiment creating ‘entanglement’ using microwave radiation.

Physicists at the University of Sussex have tamed one of the most counterintuitive phenomena of modern science in their quest to develop a new generation of machines capable of revolutionizing the way we can solve many problems in modern science.

The strange and mysterious nature of is often illustrated by a thought experiment, known as Schrӧdinger's Cat, in which a cat is theoretically both dead and alive simultaneously.

According to a new study published this week in Physical Review A, Sussex physicists have now managed to create a special type of "Schrӧdinger's" cat using new technology based on trapped ions (charged atoms) and radiation.

Like the cat, the researchers made these ions exist in two states simultaneously by creating 'entanglement', an effect that challenges the very fabric of reality itself.

Trapped ions are leading the race towards constructing a new type of computer able to solve certain problems with unprecedented speeds by taking its power from a theory called ''.

Traditionally, lasers have been used to drive such quantum processes. But millions of stable beams would have to be carefully aligned in order to be able to work with the very large number of required to encode a useful amount of data.

It would be much easier to build a quantum computer that uses microwave radiation instead of lasers for all quantum operations because, just like in a standard kitchen microwave, the radiation is easily broadcast over a large area using well-developed and inherently stable technology.

The Sussex researchers' ability to create and fully control a Schrӧdinger's cat ion using instead of lasers constitutes a significant step towards the realisation of a large scale microwave quantum computer.

Dr Winfried Hensinger, who leads the Sussex team, says: "While constructing a large scale quantum computer is still a significant challenge, this achievement demonstrates that we are moving beyond basic science towards realizing new step-changing technologies that have the potential to change our lives."

Dr Hensinger's team, consisting of postdoctoral fellows Dr Seb Weidt and Dr Simon Webster, along with PhD students Kim Lake, Joe Randall and Eamon Standing, worked for over two years to develop this microwave based technology that is capable of significantly simplifying the engineering required to build an actual quantum computer.

Dr Seb Weidt says: "This achievement opens up a whole range of opportunities to realize new quantum technologies."


Explore further

Scientists take a quieter step closer to first practical quantum computer

More information: 'Generation of spin-motion entanglement in a trapped ion using long-wavelength radiation ', by K. Lake, S. Weidt, J. Randall, E. D. Standing, S. C. Webster, and W. K. Hensinger, is published  in Physical Review A [Phys. Rev. A 91, 012319 (2015)]. journals.aps.org/pra/abstract/ … 3/PhysRevA.91.012319
Journal information: Physical Review A

Citation: Scientists tame Schrodinger's cat for a new type of quantum computer (2015, January 19) retrieved 27 February 2020 from https://phys.org/news/2015-01-scientists-schrodinger-cat-quantum.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
3317 shares

Feedback to editors

User comments