Direct estimation of functionals of density operators by local operations and classical communication

C M Alves, P Horodecki, D K L Oi, L C Kwek, A K Ekert

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We present a method of direct estimation of important properties of a shared bipartite quantum state, within the "distant laboratories" paradigm, using only local operations and classical communication. We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.

LanguageEnglish
Article number032306
Pages-
Number of pages4
JournalPhysical Review A
Volume68
Issue number3
DOIs
Publication statusPublished - Sep 2003

Fingerprint

channel capacity
functionals
communication
operators
approximation

Keywords

  • entanglement
  • density operators
  • channel capacity
  • quantum state

Cite this

Alves, C M ; Horodecki, P ; Oi, D K L ; Kwek, L C ; Ekert, A K . / Direct estimation of functionals of density operators by local operations and classical communication. In: Physical Review A. 2003 ; Vol. 68, No. 3. pp. -.
@article{62cab800e31e43a9aa0a363a791519c9,
title = "Direct estimation of functionals of density operators by local operations and classical communication",
abstract = "We present a method of direct estimation of important properties of a shared bipartite quantum state, within the {"}distant laboratories{"} paradigm, using only local operations and classical communication. We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.",
keywords = "entanglement, density operators , channel capacity , quantum state",
author = "Alves, {C M} and P Horodecki and Oi, {D K L} and Kwek, {L C} and Ekert, {A K}",
year = "2003",
month = "9",
doi = "10.1103/PhysRevA.68.032306",
language = "English",
volume = "68",
pages = "--",
journal = "Physical Review A - Atomic, Molecular, and Optical Physics",
issn = "1050-2947",
number = "3",

}

Direct estimation of functionals of density operators by local operations and classical communication. / Alves, C M ; Horodecki, P ; Oi, D K L ; Kwek, L C ; Ekert, A K .

In: Physical Review A, Vol. 68, No. 3, 032306, 09.2003, p. -.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Direct estimation of functionals of density operators by local operations and classical communication

AU - Alves, C M

AU - Horodecki, P

AU - Oi, D K L

AU - Kwek, L C

AU - Ekert, A K

PY - 2003/9

Y1 - 2003/9

N2 - We present a method of direct estimation of important properties of a shared bipartite quantum state, within the "distant laboratories" paradigm, using only local operations and classical communication. We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.

AB - We present a method of direct estimation of important properties of a shared bipartite quantum state, within the "distant laboratories" paradigm, using only local operations and classical communication. We apply this procedure to spectrum estimation of shared states, and locally implementable structural physical approximations to incompletely positive maps. This procedure can also be applied to the estimation of channel capacity and measures of entanglement.

KW - entanglement

KW - density operators

KW - channel capacity

KW - quantum state

UR - http://arxiv.org/PS_cache/quant-ph/pdf/0304/0304123v1.pdf

U2 - 10.1103/PhysRevA.68.032306

DO - 10.1103/PhysRevA.68.032306

M3 - Article

VL - 68

SP - -

JO - Physical Review A - Atomic, Molecular, and Optical Physics

T2 - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 3

M1 - 032306

ER -