Coherent oscillations in superconducting cold Fermi atoms and their applications

Details Coherent oscillations in superconducting cold Fermi atoms and their applications Coherent oscillations in superconducting cold Fermi atoms and their applications

2007-12-20

arxiv.org/abs/0712.3566v1

Physics

Condensed Matter

Strongly Correlated Electrons

Invited chapter in "Leading-edge Superconductivity Research Developments", Nova

Scientific paper

Recent achievements in experiments with cold fermionic atoms indicate the potential for developing novel superconducting devices which may be operated in a wide range of regimes, at a level of precision previously not available. Unlike traditional, solid-state superconducting devices, the cold-atom systems allow the fast switching on of the BCS phase, and the observation of non-equilibrium, coherent oscillations of the order parameter. The integrable and non-linear nature of the equations of motions makes this operating regime particularly rich in potential applications, such as quantum modulation and encoding, or nonlinear mixing of quantum coherent oscillations, to name only two. From a mathematical point of view, such systems can be described using the Knizhnik-Zamolodchikov-Bernard equation, or more generally, by the matrix Kadomtsev-Petviashvilii integrable hierarchy. This identification is particularly useful, since it allows a direct application of the known non-linear phenomena described by particular solutions of these equations. Other important features of this formulation, such as the relation to the spin Calogero-Sutherland model, also have relevant physical interpretations. In this work, a complete description of these relationships is presented, along with their potential practical consequences.

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