Non-Markovian decoherence: A critique of the two-level approximation

T. Hakioǧlu; Kerim Savran; Haldun Sevinçli; Emine Meşe

doi:10.1016/j.jmmm.2005.10.246

Non-Markovian decoherence: A critique of the two-level approximation

T. Hakioǧlu^*, Kerim Savran, Haldun Sevinçli, Emine Meşe

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

1 Citation (Scopus)

Abstract

The environmental decoherence in multilevelled systems in the context of two-level approximation is examined. It is found that the environmental temperature plays a minor role in the magnitudes of the decoherence rates whereas, the system-environment coupling and the environmental energy spectrum are dominant. Particularly, the latter is important in zero temperature quantum fluctuations and/or the nonequilibrium noise sources due to the large range of energies present in the environmental modes. Decoherence is found to be dominated by the short time nonresonant processes and this observation severely questions the use of the two-levelled models on decoherence.

Original language	English
Pages (from-to)	e579-e584
Journal	Journal of Magnetism and Magnetic Materials
Volume	300
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2005.10.246
Publication status	Published - May 2006
Externally published	Yes
Event	Third International Symposium on Magnetism 2005 - Duration: 26 Jun 2005 → 30 Jun 2005

Funding

This research is supported by the Scientific and the Technical Research Council of Turkey (TÜBİTAK) grant number TBAG-2111 (101T136).

Funders	Funder number
Technical Research Council of Turkey
TÜBİTAK	101T136, TBAG-2111

Keywords

Decoherence
Dephasing
Two-level approximation

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10.1016/j.jmmm.2005.10.246

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title = "Non-Markovian decoherence: A critique of the two-level approximation",

abstract = "The environmental decoherence in multilevelled systems in the context of two-level approximation is examined. It is found that the environmental temperature plays a minor role in the magnitudes of the decoherence rates whereas, the system-environment coupling and the environmental energy spectrum are dominant. Particularly, the latter is important in zero temperature quantum fluctuations and/or the nonequilibrium noise sources due to the large range of energies present in the environmental modes. Decoherence is found to be dominated by the short time nonresonant processes and this observation severely questions the use of the two-levelled models on decoherence.",

keywords = "Decoherence, Dephasing, Two-level approximation",

author = "T. Hakioǧlu and Kerim Savran and Haldun Sevin{\c c}li and Emine Me{\c s}e",

year = "2006",

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doi = "10.1016/j.jmmm.2005.10.246",

language = "English",

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pages = "e579--e584",

journal = "Journal of Magnetism and Magnetic Materials",

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note = "Third International Symposium on Magnetism 2005 ; Conference date: 26-06-2005 Through 30-06-2005",

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T1 - Non-Markovian decoherence

T2 - Third International Symposium on Magnetism 2005

AU - Hakioǧlu, T.

AU - Savran, Kerim

AU - Sevinçli, Haldun

AU - Meşe, Emine

PY - 2006/5

Y1 - 2006/5

N2 - The environmental decoherence in multilevelled systems in the context of two-level approximation is examined. It is found that the environmental temperature plays a minor role in the magnitudes of the decoherence rates whereas, the system-environment coupling and the environmental energy spectrum are dominant. Particularly, the latter is important in zero temperature quantum fluctuations and/or the nonequilibrium noise sources due to the large range of energies present in the environmental modes. Decoherence is found to be dominated by the short time nonresonant processes and this observation severely questions the use of the two-levelled models on decoherence.

AB - The environmental decoherence in multilevelled systems in the context of two-level approximation is examined. It is found that the environmental temperature plays a minor role in the magnitudes of the decoherence rates whereas, the system-environment coupling and the environmental energy spectrum are dominant. Particularly, the latter is important in zero temperature quantum fluctuations and/or the nonequilibrium noise sources due to the large range of energies present in the environmental modes. Decoherence is found to be dominated by the short time nonresonant processes and this observation severely questions the use of the two-levelled models on decoherence.

KW - Decoherence

KW - Dephasing

KW - Two-level approximation

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U2 - 10.1016/j.jmmm.2005.10.246

DO - 10.1016/j.jmmm.2005.10.246

M3 - Conference article

AN - SCOPUS:33644637044

SN - 0304-8853

VL - 300

SP - e579-e584

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1

Y2 - 26 June 2005 through 30 June 2005

ER -

Non-Markovian decoherence: A critique of the two-level approximation

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