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EPJ Quantum Technology Highlight - Quantum simulators explained

Posted By admin, 12 August 2014

11 August 2014 Springer Science+Business Media

Everything you ever wanted to know about quantum simulators summed up in a new review from EPJ Quantum Technology

As part of a new Thematic Series on Quantum Simulations, the open access journal EPJ Quantum Technology has just published an overview of just what a quantum simulator is, namely a device that actively uses quantum effects to answer questions on model systems. This review, published by Tomi Johnson and colleagues from the Centre for Quantum Technologies in Singapore and the University of Oxford, UK, outlines various approaches used in quantum simulators.

Specifically, the authors focus on the difference between the purpose of operations referred to as 'simulation' and 'computation'. They argue this distinction is related to the purpose of an operation, to our level of confidence in and to our expectations with regard to its accuracy.

They then explain the role of simulations in science, in particular, how simulation reveals information about a mathematical function or model in relation to a system. This approach is reminiscent of physicist Richard Feynman's definition of simulation, which is akin to using a physical device to learn about a real physical system.

Such simulation of the function of a system only takes its full significance when compared with the outcome of the same function on a real-life system of interest. The outcome helps decide whether or not the model accurately represents the real system. If the representation is thought to be accurate, the quantum simulator can then loosely be considered to be a simulator for the system of interest.

Finally the authors also explain the threshold between quantum and classical simulations. In this context, Johnson and colleagues suggest that there are many more questions pertaining to the work of simulators that need to be answered. These include: Can we predict in advance where the results of quantum simulators are more sensitive to errors? How does this overlap with the regimes of classical simulability?

Johnson, T. H., Clark, S. R. and Jaksch, D. (2014). What is a quantum simulator? European Physical Journal Quantum Technology.
DOI 10.1186/epjqt10

Tags:  EPJ  European Physical Journal  quantum simulator 

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EPJ H: the latest issue (vol. 39, January 2014) is available for our members

Posted By Administration, 04 April 2014
Updated: 04 April 2014
EPS members can access EPJ H (Historical Perspectives on Contemporary Physics) latest issues for free.

Sign in and view EPJ H here.

Tags:  EPJ  EPJ H  publication 

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EPJ C goes Open Access funded by SCOAP3

Posted By Administration, 10 January 2014
As of January 2014, The European Physical Journal C – Particles and Fields will be published as full open access journal funded by SCOAP3. One of the leading journals in the field, EPJ C was selected to participate in this initiative - lead by CERN with the support of partners in 24 countries - which will make a vast fraction of scientific articles in the field of High-Energy Physics open access at no cost for any author. Moreover authors will retain copyright and creative commons licenses will enable wide re-use of the published material.

Tags:  CERN  EPJ  open access  SCOAP3 

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EPJ celebrates 15th anniversary

Posted By Administration, 28 June 2013

The European publishing partnership for physics, The European Physical Journal (EPJ), celebrates its 15th year in 2013.

You can read the complete article on the EPJ website.
For more information please read this text written by the EPJ Steering Committee that has just been published in Europhysics News issue 44-3.

Tags:  EPJ 

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