Research output: Contribution to journal › Article › peer-review
Quantum measurement-induced antiferromagnetic order and density modulations in ultracold Fermi gases in optical lattices. / Mazzucchi, Gabriel; Caballero-Benitez, Santiago F.; Mekhov, Igor B.
In: Scientific Reports, Vol. 6, 31196, 11.08.2016.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Quantum measurement-induced antiferromagnetic order and density modulations in ultracold Fermi gases in optical lattices
AU - Mazzucchi, Gabriel
AU - Caballero-Benitez, Santiago F.
AU - Mekhov, Igor B.
N1 - Funding Information: The work was supported by the EPSRC (EP/I004394/1). Publisher Copyright: © The Author(s) 2016. Copyright: Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2016/8/11
Y1 - 2016/8/11
N2 - Ultracold atomic systems offer a unique tool for understanding behavior of matter in the quantum degenerate regime, promising studies of a vast range of phenomena covering many disciplines from condensed matter to quantum information and particle physics. Coupling these systems to quantized light fields opens further possibilities of observing delicate effects typical of quantum optics in the context of strongly correlated systems. Measurement backaction is one of the most funda-mental manifestations of quantum mechanics and it is at the core of many famous quantum optics experiments. Here we show that quantum backaction of weak measurement can be used for tailoring long-range correlations of ultracold fermions, realizing quantum states with spatial modulations of the density and magnetization, thus overcoming usual requirement for a strong interatomic interactions. We propose detection schemes for implementing antiferromagnetic states and density waves. We demonstrate that such long-range correlations cannot be realized with local addressing, and they are a consequence of the competition between global but spatially structured backaction of weak quantum measurement and unitary dynamics of fermions.
AB - Ultracold atomic systems offer a unique tool for understanding behavior of matter in the quantum degenerate regime, promising studies of a vast range of phenomena covering many disciplines from condensed matter to quantum information and particle physics. Coupling these systems to quantized light fields opens further possibilities of observing delicate effects typical of quantum optics in the context of strongly correlated systems. Measurement backaction is one of the most funda-mental manifestations of quantum mechanics and it is at the core of many famous quantum optics experiments. Here we show that quantum backaction of weak measurement can be used for tailoring long-range correlations of ultracold fermions, realizing quantum states with spatial modulations of the density and magnetization, thus overcoming usual requirement for a strong interatomic interactions. We propose detection schemes for implementing antiferromagnetic states and density waves. We demonstrate that such long-range correlations cannot be realized with local addressing, and they are a consequence of the competition between global but spatially structured backaction of weak quantum measurement and unitary dynamics of fermions.
UR - http://www.scopus.com/inward/record.url?scp=84982128204&partnerID=8YFLogxK
U2 - 10.1038/srep31196
DO - 10.1038/srep31196
M3 - Article
AN - SCOPUS:84982128204
VL - 6
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
M1 - 31196
ER -
ID: 69878034