Multi-particle-hole excitations in many-body Fermi systems

E. Krotscheck; K. W. Schörkhuber

doi:10.1016/S0921-4526(02)01899-9

Multi-particle-hole excitations in many-body Fermi systems

E. Krotscheck
, K. W. Schörkhuber

Physics

Johannes Kepler University Linz

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

Abstract

We formulate a microscopic theory for calculating the dynamic structure function of ³He and other strongly interacting Fermi liquids. The theory is a generalization of the correlated basis function theory for the dynamics of ⁴He and includes time-dependent two-particle - two-hole excitations. It may also be interpreted as a systematic extension of the random-phase approximation (RPA). Comparison of numerical results with experiments show a significant improvement of the excitation spectrum over RPA predictions while maintaining the accuracy of prediction of ground-state quantities like the static structure function.

Original language	English
Pages (from-to)	102-103
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
DOIs	https://doi.org/10.1016/S0921-4526(02)01899-9
State	Published - May 2003
Event	Proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: Aug 20 2002 → Aug 27 2002

Keywords

He
Dynamic structure factor
Excitations
Fermion systems

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10.1016/S0921-4526(02)01899-9

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title = "Multi-particle-hole excitations in many-body Fermi systems",

abstract = "We formulate a microscopic theory for calculating the dynamic structure function of 3He and other strongly interacting Fermi liquids. The theory is a generalization of the correlated basis function theory for the dynamics of 4He and includes time-dependent two-particle - two-hole excitations. It may also be interpreted as a systematic extension of the random-phase approximation (RPA). Comparison of numerical results with experiments show a significant improvement of the excitation spectrum over RPA predictions while maintaining the accuracy of prediction of ground-state quantities like the static structure function.",

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year = "2003",

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doi = "10.1016/S0921-4526(02)01899-9",

language = "English",

volume = "329-333",

pages = "102--103",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier B.V.",

note = "Proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

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TY - JOUR

T1 - Multi-particle-hole excitations in many-body Fermi systems

AU - Krotscheck, E.

AU - Schörkhuber, K. W.

PY - 2003/5

Y1 - 2003/5

N2 - We formulate a microscopic theory for calculating the dynamic structure function of 3He and other strongly interacting Fermi liquids. The theory is a generalization of the correlated basis function theory for the dynamics of 4He and includes time-dependent two-particle - two-hole excitations. It may also be interpreted as a systematic extension of the random-phase approximation (RPA). Comparison of numerical results with experiments show a significant improvement of the excitation spectrum over RPA predictions while maintaining the accuracy of prediction of ground-state quantities like the static structure function.

AB - We formulate a microscopic theory for calculating the dynamic structure function of 3He and other strongly interacting Fermi liquids. The theory is a generalization of the correlated basis function theory for the dynamics of 4He and includes time-dependent two-particle - two-hole excitations. It may also be interpreted as a systematic extension of the random-phase approximation (RPA). Comparison of numerical results with experiments show a significant improvement of the excitation spectrum over RPA predictions while maintaining the accuracy of prediction of ground-state quantities like the static structure function.

KW - He

KW - Dynamic structure factor

KW - Excitations

KW - Fermion systems

UR - https://www.scopus.com/pages/publications/17044444343

U2 - 10.1016/S0921-4526(02)01899-9

DO - 10.1016/S0921-4526(02)01899-9

M3 - Conference article

AN - SCOPUS:17044444343

SN - 0921-4526

VL - 329-333

SP - 102

EP - 103

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - Proceedings of the 23rd international conference on low temper

Y2 - 20 August 2002 through 27 August 2002

ER -

Multi-particle-hole excitations in many-body Fermi systems

Abstract

Keywords

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