publication . Article . Other literature type . Preprint . 2018

Estimating localizable entanglement from witnesses

David Amaro; Markus Müller; Amit Kumar Pal;
Open Access
  • Published: 12 Jun 2018 Journal: New Journal of Physics, volume 20, page 63,017 (eissn: 1367-2630, Copyright policy)
  • Publisher: IOP Publishing
Abstract
Computing localizable entanglement for noisy many-particle quantum states is difficult due to the optimization over all possible sets of local projection measurements. Therefore, it is crucial to develop lower bounds, which can provide useful information about the behaviour of localizable entanglement, and which can be determined by measuring a limited number of operators, or by performing least number of measurements on the state, preferably without performing a full state tomography. In this paper, we adopt two different yet related approaches to obtain a witness-based, and a measurement-based lower bounds for localizable entanglement. The former is determined...
Subjects
free text keywords: General Physics and Astronomy, Entanglement witness, Qubit, Quantum state, Operator (computer programming), Upper and lower bounds, Statistical physics, Quantum mechanics, Expectation value, Quantum entanglement, Physics, Pauli exclusion principle, symbols.namesake, symbols, Quantum Physics
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publication . Article . Other literature type . Preprint . 2018

Estimating localizable entanglement from witnesses

David Amaro; Markus Müller; Amit Kumar Pal;