Relaxation dynamics of a Fermi gas in an optical superlattice.
This Letter comprises an experimental and theoretical investigation of the time evolution of a Fermi gas following fast and slow quenches of a one-dimensional optical double-well superlattice potential. We investigate both the local tunneling in the connected double wells and the global dynamics towards a steady state, i.e., a time-independent state. The local observables in the steady state resemble those of a thermal equilibrium state, whereas the global properties indicate a strong nonequilibrium situation.
Physikalisches Institut, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany and Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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D
Pertot
HISKP, University of Bonn, Nussallee 14-16, 53115 Bonn, Germany.
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A
Sheikhan
Physikalisches Institut, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany and Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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E
Cocchi
Physikalisches Institut, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany and Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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LA
Miller
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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JE
Bohn
Physikalisches Institut, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany and Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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M
Koschorreck
Physikalisches Institut, University of Bonn, Wegelerstraße 8, 53115 Bonn, Germany and Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB30HE, United Kingdom.
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M
Köhl
HISKP, University of Bonn, Nussallee 14-16, 53115 Bonn, Germany.
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C
Kollath