Reference : Super-Heisenberg scaling in Hamiltonian parameter estimation in the long-range Kitaev...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/50445
Super-Heisenberg scaling in Hamiltonian parameter estimation in the long-range Kitaev chain
English
Yang, Jing mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)]
Pang, Shengshi [School of Physics, Sun Yat-Sen University, Guangzhou, Guangdong 510275, China]
Del Campo Echevarria, Adolfo mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Jordan, Andrew N. [Institute for Quantum Studies, Chapman University, 1 University Drive, Orange, CA 92866, USA > > > ; Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA]
Nov-2021
Physical Review Research
Yes
International
[en] In quantum metrology, nonlinear many-body interactions can enhance the precision of Hamiltonian parameter estimation to surpass the Heisenberg scaling. Here, we consider the estimation of the interaction strength in linear systems with long-range interactions and using the Kitaev chains as a case study, we establish a transition from the Heisenberg to super-Heisenberg scaling in the quantum Fisher information by varying the interaction range. We further show that quantum control can improve the prefactor of the quantum Fisher information. Our results explore the advantage of optimal quantum control and long-range interactions in many-body quantum
metrology.
http://hdl.handle.net/10993/50445

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