Improvement of frequency standards with quantum entanglement

S.F. Huelga; C. Macchiavello; T. Pellizzari; A.K. Ekert; M.B. Plenio; J. Cirac

doi:10.1103/PhysRevLett.79.3865

Improvement of frequency standards with quantum entanglement

S.F. Huelga, C. Macchiavello, T. Pellizzari, A.K. Ekert, M.B. Plenio, J. Cirac

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Abstract

The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyse different preparations of n two-level systems as well as different measurements procedures. We show that standard Ramsey spec- troscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry.

Original language	English
Pages (from-to)	3865-68
Journal	Physical Review Letters
Volume	79
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.79.3865
Publication status	Published - 1997

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title = "Improvement of frequency standards with quantum entanglement",

abstract = "The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyse different preparations of n two-level systems as well as different measurements procedures. We show that standard Ramsey spec- troscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry.",

author = "S.F. Huelga and C. Macchiavello and T. Pellizzari and A.K. Ekert and M.B. Plenio and J. Cirac",

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AU - Huelga, S.F.

AU - Macchiavello, C.

AU - Pellizzari, T.

AU - Ekert, A.K.

AU - Plenio, M.B.

AU - Cirac, J.

N1 - Original article can be found at: http://prola.aps.org/--Copyright American Physical Society DOI : 10.1103/PhysRevLett.79.3865

PY - 1997

Y1 - 1997

N2 - The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyse different preparations of n two-level systems as well as different measurements procedures. We show that standard Ramsey spec- troscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry.

AB - The optimal precision of frequency measurements in the presence of decoherence is discussed. We analyse different preparations of n two-level systems as well as different measurements procedures. We show that standard Ramsey spec- troscopy on uncorrelated atoms and optimal measurements on maximally entangled states provide the same resolution. The best resolution is achieved using partially entangled preparations with a high degree of symmetry.

U2 - 10.1103/PhysRevLett.79.3865

DO - 10.1103/PhysRevLett.79.3865

M3 - Article

SN - 0031-9007

VL - 79

SP - 3865

EP - 3868

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

ER -

Improvement of frequency standards with quantum entanglement

Abstract

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