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Theoretical physics discovery to set the research field buzzing
by Staff Writers
Cincinnati OH (SPX) Mar 21, 2016

Nayana Shah, a University of Cincinnati assistant professor of physics, and Carlos Bolech, a UC associate professor of physics, will be among researchers from around the world presenting groundbreaking research at the March meeting of the American Physical Society. Image courtesy Joseph Fuqua II. For a larger version of this image please go here.

Bazinga! University of Cincinnati theoretical physicists are about to report on a controversial discovery that they say contradicts the work of researchers over the decades. The discovery concerns the conventional approach toward bosonization-debosonization.

For folks outside the physics lab and the whiteboard, this could affect calculations regarding the future of quantum computers as well as your electronic devices as they become smaller, faster and more advanced.

Nayana Shah, a University of Cincinnati assistant professor of physics, and Carlos Bolech, a UC associate professor of physics, will be among researchers from around the world presenting groundbreaking research at the March meeting of the American Physical Society, which takes place March 14-18 in Baltimore.

The discovery involves how to solve problems when there are strong interactions between particles that need to work in harmony with each other - bosons or fermions. An example of a fermion is an electron and an example of a boson is a light particle (photon).

To get these particles to interact with each other and therefore power the high-tech devices of the future, theoretical physicists do calculations, a sort of alchemy, to transform fermions into bosons, called bosonization, or in reverse apply formulas for debosonization.

"This 'refermionization' is like magic, because it can turn originally intractable problems into exactly solvable ones," explains Shah.

The researchers, however say they found that certain solutions with and without bosonization were not matching, despite the fact that the two were supposed to be exact. Shah and Bolech report that the issue involved violation of certain conservation laws in the bosonization-based procedure.

"An innovative reworking allowed us to incorporate some of the missing pieces into the steps of bosonization and debosonization and restore the magic," says Bolech.

The researchers applied their new consistent formalism toward what's called the Nonequilibrium Kondo Problem in the physics world, a problem which can be applied to interacting electrons at the nano-scale - the very tiniest scale possible for electronics.

"What are the implications for the large body of past work that has used bosonization since the 1990s and earlier? Many results will have to be reworked," says Bolech.

"The good news is that the consistent formalism gives a general recipe for how to proceed," adds Shah.

Two papers reporting the research, Consistent bosonization-debosonization I and II, were recently published in the American Physical Society's Condensed Matter Physics journal, Physical Review B.


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