Maximally entangled gapped ground state of lattice fermions

Details Maximally entangled gapped ground state of lattice fermions Maximally entangled gapped ground state of lattice fermions

2011-12-21

arxiv.org/abs/1112.5133v1

Phys. Rev. A 85, 012312 (2012)

Physics

Quantum Physics

9 pages, 2 figures

Scientific paper

10.1103/PhysRevA.85.012312

Entanglement between the constituents of a quantum system is an essential resource in the implementation of many quantum processes and algorithms. Indeed, universal quantum computation is possible by measuring individual qubits comprising highly entangled cluster states. In this work it is shown that the unique gapped ground state of non-interacting fermions hopping on a specially prepared lattice is equivalent to a cluster state, where the entanglement between qubits results solely by fermionic indistinguishability and antisymmetry. A deterministic strategy for universal measurement-based quantum computation with this resource is described. Because most matter is composed of fermions, these results suggest that resources for quantum information processing might be generic in Nature.

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