Lancaster Ultra-Low Temperature Group in Nature Physics
Story supplied by LU Press Office
Low-temperature physicists at Lancaster University may have found a laboratory test of the 'untestable' string theory.
The test - which uses two distinct phases of liquid helium - is reported online this week in Nature Physics (published 23 December). Their paper will also be published as the cover article in the paper edition of Nature Physics in January.
String theory is a multidimensional theory based on vibrating strings, as opposed to the point particles described in the Standard Model.
Within string theory, a brane is a large surface embedded in higher dimensional space - our Universe could occupy such a brane.
A collision between a brane and an antibrane can leave behind topological defects, including perhaps the Big Bang itself. But however elegant this theory, it makes no falsifiable predictions, or at least none using current technology.
Richard Haley and the ULT Group have taken a lateral step to address this barrier. They cool the helium-3 isotope to a superfluid state - that is, a quantum fluid with non-classical properties such as completely frictionless flow. Adding a magnetic field creates a second superfluid phase, and the interface between these two phases behaves like a two-dimensional brane.
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In this report we provide some case studies of our work with external partners during 2013-2014. Read about R&D opportunities with China, new science and technology start-up companies, research with IBM, Booths and regional Small and Medium Enterprises, seed funding for new products and processes, new facilities for hire, free events and training, new companies on campus, plugging the data science skills gap, the Engineering Design Academy, and much more...
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