Jun 11 2012
Element Six, the world leader in synthetic diamond supermaterials, working in partnership with academics in Harvard University, California Institute of Technology and Max-Planck-Institut für Quantenoptik, has used its Element Six single crystal synthetic diamond grown by chemical vapour deposition (CVD) to demonstrate the capability of quantum bit memory to exceed one second at room temperature.
This study demonstrated the ability of synthetic diamond to provide the read-out of a quantum bit which had preserved its spin polarisation for several minutes and its memory coherence for over a second. This is the first time that such long memory times have been reported for a material at room temperature, giving synthetic diamond a significant advantage over rival materials and technologies that require complex infrastructure which necessitates, for example, cryogenic cooling.
The versatility, robustness, and potential scalability of this synthetic diamond system may allow for new applications in quantum information science and quantum based sensors used, for example, in nano-scale imaging of chemical/biological processes.
The synthetic diamond technical work was completed by the Element Six synthetic diamond R&D team based at Ascot in the UK who developed novel processes for growing synthetic diamond using chemical vapour deposition (CVD) techniques. Steve Coe, Element Six Group Innovation Director, explained the success of the collaboration:
"The field of synthetic diamond science is moving very quickly and is requiring Element Six to develop synthesis processes with impurity control at the level of parts per trillion - real nano-engineering control of CVD diamond synthesis. We have been working closely with Professor Lukin's team in Harvard for three years - this result published in Science is an example of how successful this collaboration has been."
Professor Mikhail Lukin of Harvard University's Department of Physics described the significance of the research findings:
"Element Six's unique and engineered synthetic diamond material has been at the heart of these important developments. The demonstration of a single qubit quantum memory with seconds of storage time at room temperature is a very exciting development, which combines the four key requirements of initialisation, memory, control and measurement. These findings might one day lead to novel quantum communication and computation technologies, but in the nearer term may enable a range of novel and disruptive quantum sensor technologies, such as those being targeted to image magnetic fields on the nano-scale for use in imaging chemical and biological processes."
The findings represent the latest developments in quantum information processing, which involves manipulating individual atomic sized impurities in synthetic diamond and exploiting the quantum property spin of an individual electron, which can be thought of classically as a bar magnet having two states: up (1) and down (0). However, in the quantum mechanical description (physics of the very small), this quantum spin (qubit) can be both 0 and 1 simultaneously. It is this property that provides a framework for quantum computing, but also for more immediate applications such as novel magnetic sensing technologies.
Notes to Editors:
About Element Six
Element Six (http://www.e6.com) is an independently managed synthetic diamond supermaterials company. Element Six is part of the De Beers Family of Companies and is co-owned by Umicore, the Belgian materials group. Element Six is a global leader in the design, development and production of synthetic diamond supermaterials, and operates worldwide with its head office registered in Luxembourg, and primary manufacturing facilities in China, Germany, Ireland, Sweden, South Africa and the UK.
The quantum information research collaboration
The study was a collaboration between the following organisations:
- Element Six, Ascot, UK,
- Department of Physics, Harvard University, Cambridge, MA, USA
- Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, CA, USA.
- Max-Planck-Institut für Quantenoptik, Garching, Germany.
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
Funding for some of this research was provided by the DARPA QuASAR programme. The results of the research appear in an article in Science magazine, published 8 June 2012.
For further technical details of the research, please see the full press release posted on the Element Six website:
http://www.e6.com/wps/wcm/connect/e6_content_en/home/about+us/news/news+2012/element+six+and+harvard+university+collaboration+on+nano-engineered+synthetic+diamond+sets+a+new+quantum+information+record
SOURCE Element Six