Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice
We consider the nonequilibrium dynamics of an interacting spin- $\frac {1}{2}$ fermion gas in a one-dimensional optical lattice after switching off the confining potential. In particular, we study the creation and the time evolution of spatially separated, spin-entangled fermionic pairs. The time-de...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2013-01-01
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| Series: | New Journal of Physics |
| Online Access: | https://doi.org/10.1088/1367-2630/15/5/053043 |
| _version_ | 1797751649380335616 |
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| author | Stefan Keßler Ian P McCulloch Florian Marquardt |
| author_facet | Stefan Keßler Ian P McCulloch Florian Marquardt |
| author_sort | Stefan Keßler |
| collection | DOAJ |
| description | We consider the nonequilibrium dynamics of an interacting spin- $\frac {1}{2}$ fermion gas in a one-dimensional optical lattice after switching off the confining potential. In particular, we study the creation and the time evolution of spatially separated, spin-entangled fermionic pairs. The time-dependent density-matrix renormalization group is used to simulate the time evolution and evaluate the two-site spin correlation functions, from which the concurrence is calculated. We find that the typical distance between entangled fermions depends crucially on the onsite interaction strength, and that a time-dependent modulation of the tunnelling amplitude can enhance the production of spin entanglement. Moreover, we discuss the prospects of experimentally observing these phenomena using spin-dependent single-site detection. |
| first_indexed | 2024-03-12T16:51:37Z |
| format | Article |
| id | doaj.art-5fcd6093de0a4fd29760f9f615a5d213 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:51:37Z |
| publishDate | 2013-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-5fcd6093de0a4fd29760f9f615a5d2132023-08-08T11:09:10ZengIOP PublishingNew Journal of Physics1367-26302013-01-0115505304310.1088/1367-2630/15/5/053043Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical latticeStefan Keßler0Ian P McCulloch1Florian Marquardt2Institute for Theoretical Physics, Universität Erlangen-Nürnberg , Staudtstrasse 7, D-91058 Erlangen, GermanyCentre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland , St Lucia, QLD 4072, AustraliaInstitute for Theoretical Physics, Universität Erlangen-Nürnberg , Staudtstrasse 7, D-91058 Erlangen, Germany; Max Planck Institute for the Science of Light , Günther-Scharowsky-Straße 1/Bau 24, D-91058 Erlangen, GermanyWe consider the nonequilibrium dynamics of an interacting spin- $\frac {1}{2}$ fermion gas in a one-dimensional optical lattice after switching off the confining potential. In particular, we study the creation and the time evolution of spatially separated, spin-entangled fermionic pairs. The time-dependent density-matrix renormalization group is used to simulate the time evolution and evaluate the two-site spin correlation functions, from which the concurrence is calculated. We find that the typical distance between entangled fermions depends crucially on the onsite interaction strength, and that a time-dependent modulation of the tunnelling amplitude can enhance the production of spin entanglement. Moreover, we discuss the prospects of experimentally observing these phenomena using spin-dependent single-site detection.https://doi.org/10.1088/1367-2630/15/5/053043 |
| spellingShingle | Stefan Keßler Ian P McCulloch Florian Marquardt Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice New Journal of Physics |
| title | Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| title_full | Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| title_fullStr | Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| title_full_unstemmed | Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| title_short | Creation and dynamics of remote spin-entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| title_sort | creation and dynamics of remote spin entangled pairs in the expansion of strongly correlated fermions in an optical lattice |
| url | https://doi.org/10.1088/1367-2630/15/5/053043 |
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