Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices
(2013) In Scientific Reports 3.- Abstract
- Non-equilibrium quantum phenomena are ubiquitous in nature. Yet, theoretical predictions on the real-time dynamics of many-body quantum systems remain formidably challenging, especially for high dimensions, strong interactions or disordered samples. Here we consider a notable paradigm of strongly correlated Fermi systems, the Mott phase of the Hubbard model, in a setup resembling ultracold-gases experiments. We study the three-dimensional expansion of a cloud into an optical lattice after removing the confining potential. We use time-dependent density-functional theory combined with dynamical mean-field theory, considering interactions below and above the Mott threshold, as well as disorder effects. At strong coupling, we observe multiple... (More)
- Non-equilibrium quantum phenomena are ubiquitous in nature. Yet, theoretical predictions on the real-time dynamics of many-body quantum systems remain formidably challenging, especially for high dimensions, strong interactions or disordered samples. Here we consider a notable paradigm of strongly correlated Fermi systems, the Mott phase of the Hubbard model, in a setup resembling ultracold-gases experiments. We study the three-dimensional expansion of a cloud into an optical lattice after removing the confining potential. We use time-dependent density-functional theory combined with dynamical mean-field theory, considering interactions below and above the Mott threshold, as well as disorder effects. At strong coupling, we observe multiple timescales in the melting of the Mott wedding-cake structure, as the Mott plateau persist orders of magnitude longer than the band insulating core. We also show that disorder destabilises the Mott plateau and that, compared to a clean setup, localisation can decrease, creating an interesting dynamic crossover during the expansion. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4106554
- author
- Kartsev, Alexey LU ; Karlsson, Daniel LU ; Privitera, A. and Verdozzi, Claudio LU
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Scientific Reports
- volume
- 3
- article number
- 2570
- publisher
- Nature Publishing Group
- external identifiers
-
- wos:000323813700001
- scopus:84884216548
- pmid:23999144
- ISSN
- 2045-2322
- DOI
- 10.1038/srep02570
- language
- English
- LU publication?
- yes
- id
- 36a5e0b2-0f15-4ea0-b87b-9d112a0995a6 (old id 4106554)
- date added to LUP
- 2016-04-01 12:57:14
- date last changed
- 2022-01-27 08:29:21
@article{36a5e0b2-0f15-4ea0-b87b-9d112a0995a6, abstract = {{Non-equilibrium quantum phenomena are ubiquitous in nature. Yet, theoretical predictions on the real-time dynamics of many-body quantum systems remain formidably challenging, especially for high dimensions, strong interactions or disordered samples. Here we consider a notable paradigm of strongly correlated Fermi systems, the Mott phase of the Hubbard model, in a setup resembling ultracold-gases experiments. We study the three-dimensional expansion of a cloud into an optical lattice after removing the confining potential. We use time-dependent density-functional theory combined with dynamical mean-field theory, considering interactions below and above the Mott threshold, as well as disorder effects. At strong coupling, we observe multiple timescales in the melting of the Mott wedding-cake structure, as the Mott plateau persist orders of magnitude longer than the band insulating core. We also show that disorder destabilises the Mott plateau and that, compared to a clean setup, localisation can decrease, creating an interesting dynamic crossover during the expansion.}}, author = {{Kartsev, Alexey and Karlsson, Daniel and Privitera, A. and Verdozzi, Claudio}}, issn = {{2045-2322}}, language = {{eng}}, publisher = {{Nature Publishing Group}}, series = {{Scientific Reports}}, title = {{Three-dimensional dynamics of a fermionic Mott wedding-cake in clean and disordered optical lattices}}, url = {{http://dx.doi.org/10.1038/srep02570}}, doi = {{10.1038/srep02570}}, volume = {{3}}, year = {{2013}}, }