Many-body protected entanglement generation in interacting spin systems

We discuss a method to achieve decoherence resistent entanglement generation in two level spin systems governed by gapped and multi-degenerate Hamiltonians. In such systems, while the large number of degrees of freedom in the ground state levels allows to create various quantum superpositions, the energy gap prevents decoherence. We apply the protected evolution to achieve decoherence resistent generation of many particle GHZ states and show it can significantly increase the sensitivity in frequency spectroscopy. We discuss how to engineer the desired many-body protected manifold in two specific physical systems, trapped ions and neutral atoms in optical lattices, and present simple expressions for the fidelity of GHZ generation under non-ideal conditions.

• Publication year

  2007

• Venue

  Physical Review A

• Publication date

  2007-06-22

• Fields of study

  Physics

• Identifiers
  DOI 10.1103/PhysRevA.77.052305arXiv 0706.3378
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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