6533b829fe1ef96bd128a33b
RESEARCH PRODUCT
Orthogonality Catastrophe and Decoherence in a Trapped-Fermion Environment
A. SindonaSalvatore LorenzoN. Lo GulloN. Lo GulloN. Lo GulloJohn GooldJohn GooldFrancesco Plastinasubject
DYNAMICSQuantum decoherenceSINGULARITIESCarbon nanotubesFOS: Physical sciencesGeneral Physics and AstronomyX-RAY ABSORPTIONPolaronCARBON NANOTUBESSettore FIS/03 - Fisica Della MateriaX-ray absorptionEmissionSingularityOrthogonalityQuantum mechanicsMesoscale and Nanoscale Physics (cond-mat.mes-hall)Condensed Matter::Quantum GasesPhysicsQuantum PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsScatteringPolaronsFermionKONDO PROBLEMDynamicsKondo problemMetalsPOLARONSCondensed Matter::Strongly Correlated ElectronsGravitational singularityMETALSEMISSIONSingularitiesQuantum Physics (quant-ph)Ground statedescription
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, in particular to the amount of non-markovianity of its dynamics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-11-06 | Physical Review Letters |