Probing relaxation dynamics of a few strongly correlated bosons in a 1D triple well optical lattice

The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational time-dependent Hartree method for bosons. We report the contrasting response of the system under two independent quench processes: an intera...

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Published inJournal of physics. B, Atomic, molecular, and optical physics Vol. 52; no. 21; pp. 215303 - 215312
Main Authors Bera, S, Roy, R, Gammal, A, Chakrabarti, B, Chatterjee, B
Format Journal Article
LanguageEnglish
Published IOP Publishing 14.11.2019
Subjects
information entropy
interaction quench
lattice depth quench
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Abstract The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational time-dependent Hartree method for bosons. We report the contrasting response of the system under two independent quench processes: an interaction quench and a lattice depth quench. We analyze the evolution of the reduced one-body density matrix, two-body density and the Shannon information entropy for a wide range of lattice depth and interaction strength parameters. For the strong interaction quench, we observe a very fast relaxation to the steady state. In contrast, for the lattice depth quench, we observe collapse-revival dynamics in all the key measures. We also provide the best fitting formulas for relaxation and revival time which follow power law decay.
AbstractList The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational time-dependent Hartree method for bosons. We report the contrasting response of the system under two independent quench processes: an interaction quench and a lattice depth quench. We analyze the evolution of the reduced one-body density matrix, two-body density and the Shannon information entropy for a wide range of lattice depth and interaction strength parameters. For the strong interaction quench, we observe a very fast relaxation to the steady state. In contrast, for the lattice depth quench, we observe collapse-revival dynamics in all the key measures. We also provide the best fitting formulas for relaxation and revival time which follow power law decay.
Author Bera, S
Roy, R
Gammal, A
Chakrabarti, B
Chatterjee, B
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Snippet The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational...
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SubjectTerms information entropy
interaction quench
lattice depth quench
Title Probing relaxation dynamics of a few strongly correlated bosons in a 1D triple well optical lattice
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