Orthogonality catastrophe and decoherence in a trapped-fermion environment
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Date
2013
Authors
Sindona, Antonello
Goold, John
Lo Gullo, Nicola
Lorenzo, S.
Plastina, Francesco
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American Physical Society
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Abstract
The Fermi-edge singularity and the Anderson orthogonality catastrophe describe the universal physics which occurs when a Fermi sea is locally quenched by the sudden switching of a scattering potential, leading to a brutal disturbance of its ground state. We demonstrate that the effect can be seen in the controllable domain of ultracold trapped gases by providing an analytic description of the out-of-equilibrium response to an atomic impurity, both at zero and at finite temperature. Furthermore, we link the transient behavior of the gas to the decoherence of the impurity, and to the degree of the non-Markovian nature of its dynamics.
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Keywords
X-ray absorption , Carbon nanotubes , Kondo problem , Metals , Singularities , Emission , Dynamics , Polarons
Citation
Sindona, A., Goold, J., Lo Gullo, N., Lorenzo, S. and Plastina, F. (2013) 'Orthogonality catastrophe and decoherence in a trapped-fermion environment', Physical Review Letters, 111(16), 165303 (5pp). doi: 10.1103/PhysRevLett.111.165303
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© 2013, American Physical Society