On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs

Some physical phenomena such as superconductivity, superfluidity or magnetic ordering are supported by condensed phases of pairs of fermions. In addition, another concept, off-diagonal long-range-order correlations (ODLRO), is closely related to this phenomenon to such an extent that one phenomenon...

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Autor principal: Bochicchio, R.C.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01661280_v210_nC_p99_Bochicchio
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_01661280_v210_nC_p99_Bochicchio2023-10-03T15:03:17Z On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs Bochicchio, R.C. Some physical phenomena such as superconductivity, superfluidity or magnetic ordering are supported by condensed phases of pairs of fermions. In addition, another concept, off-diagonal long-range-order correlations (ODLRO), is closely related to this phenomenon to such an extent that one phenomenon implies the other for boson systems. The concept of the generalized Bose condensation is extended to fermion pairs (or pairons) because they are neither fermions nor bosons. The definition of the correlation density matrix allows the generalized condensation of the Girardeau type and even Coleman's definition as corollaries. In addition, the definition allows an interpretation of why fermionic systems never exhibit ODLRO; early results are confirmed from this different perspective. Population analysis was used in order to quantify the condensation of pairs in systems with intrinsic physico-chemical interest such as molecules and crystals. Fermionic-like particles (q-ons) which may exhibit this particular behaviour are also considered. © 1990. Fil:Bochicchio, R.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01661280_v210_nC_p99_Bochicchio
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Some physical phenomena such as superconductivity, superfluidity or magnetic ordering are supported by condensed phases of pairs of fermions. In addition, another concept, off-diagonal long-range-order correlations (ODLRO), is closely related to this phenomenon to such an extent that one phenomenon implies the other for boson systems. The concept of the generalized Bose condensation is extended to fermion pairs (or pairons) because they are neither fermions nor bosons. The definition of the correlation density matrix allows the generalized condensation of the Girardeau type and even Coleman's definition as corollaries. In addition, the definition allows an interpretation of why fermionic systems never exhibit ODLRO; early results are confirmed from this different perspective. Population analysis was used in order to quantify the condensation of pairs in systems with intrinsic physico-chemical interest such as molecules and crystals. Fermionic-like particles (q-ons) which may exhibit this particular behaviour are also considered. © 1990.
format JOUR
author Bochicchio, R.C.
spellingShingle Bochicchio, R.C.
On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
author_facet Bochicchio, R.C.
author_sort Bochicchio, R.C.
title On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
title_short On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
title_full On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
title_fullStr On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
title_full_unstemmed On the electronic distribution for extended systems. Part II. Condensation and long-range-order correlations for fermion pairs
title_sort on the electronic distribution for extended systems. part ii. condensation and long-range-order correlations for fermion pairs
url http://hdl.handle.net/20.500.12110/paper_01661280_v210_nC_p99_Bochicchio
work_keys_str_mv AT bochicchiorc ontheelectronicdistributionforextendedsystemspartiicondensationandlongrangeordercorrelationsforfermionpairs
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