Quantum Fisher Information of Bipartitions of W States


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Ozaydin F., Altintas A. A., Yesilyurt C., Bugu S., Erol V.

ACTA PHYSICA POLONICA A, vol.127, no.4, pp.1233-1235, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 127 Issue: 4
  • Publication Date: 2015
  • Doi Number: 10.12693/aphyspola.127.1233
  • Journal Name: ACTA PHYSICA POLONICA A
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1233-1235
  • Istanbul University Affiliated: No

Abstract

We study the quantum Fisher information (QFI) of W states and W-like states under decoherence. In particular, we find that on the contrary to amplitude damping and depolarizing decoherence, a W-like state of 3 qubits obtained by discarding 1 qubit of a genuine W state of 4 qubits is more robust than a genuine W state of 3 qubits under amplitude amplifying and phase damping decoherence.