The two-hole ground state of the Hubbard-Anderson model, approximated by a variational RVB-type wave function

M.R.M.J. Traa; W.J. Caspers; E.J. Banning

doi:10.1016/0378-4371(94)90037-X

The two-hole ground state of the Hubbard-Anderson model, approximated by a variational RVB-type wave function

M.R.M.J. Traa, W.J. Caspers, E.J. Banning

Research output: Contribution to journal › Article › Academic › peer-review

1 Citation (Scopus)

145 Downloads (Pure)

Abstract

In this paper the Hubbard-Anderson model on a square lattice with two holes is studied. The ground state (GS) is approximated by a variational RVB-type wave function. The holes interact by exchange of a localized spin excitation (SE), which is created or absorbed if a hole moves to a nearest-neighbour site. An SE can move over the sublattice on which it is created. A variational calculation of the GS and the GS-energy is performed for an open-ended 4 × 4 lattice with two holes with the restriction that the SE is neighbouring both holes and does not move over its sublattice. It is found that the two holes prefer a bound state in which their mutual distance is 1 or V2 (with lattice spacing 1).

Original language	English
Pages (from-to)	145-158
Number of pages	14
Journal	Physica A
Volume	203
Issue number	203
DOIs	https://doi.org/10.1016/0378-4371(94)90037-X
Publication status	Published - 1994

Access to Document

10.1016/0378-4371(94)90037-X

Traa1994two-holeFinal published version, 826 KB

Cite this

@article{4407d54008dd4c2a942bf3c91fb14912,

title = "The two-hole ground state of the Hubbard-Anderson model, approximated by a variational RVB-type wave function",

abstract = "In this paper the Hubbard-Anderson model on a square lattice with two holes is studied. The ground state (GS) is approximated by a variational RVB-type wave function. The holes interact by exchange of a localized spin excitation (SE), which is created or absorbed if a hole moves to a nearest-neighbour site. An SE can move over the sublattice on which it is created. A variational calculation of the GS and the GS-energy is performed for an open-ended 4 × 4 lattice with two holes with the restriction that the SE is neighbouring both holes and does not move over its sublattice. It is found that the two holes prefer a bound state in which their mutual distance is 1 or V2 (with lattice spacing 1).",

author = "M.R.M.J. Traa and W.J. Caspers and E.J. Banning",

year = "1994",

doi = "10.1016/0378-4371(94)90037-X",

language = "English",

volume = "203",

pages = "145--158",

journal = "Physica A",

issn = "0378-4371",

publisher = "Elsevier B.V.",

number = "203",

}

TY - JOUR

T1 - The two-hole ground state of the Hubbard-Anderson model, approximated by a variational RVB-type wave function

AU - Traa, M.R.M.J.

AU - Caspers, W.J.

AU - Banning, E.J.

PY - 1994

Y1 - 1994

N2 - In this paper the Hubbard-Anderson model on a square lattice with two holes is studied. The ground state (GS) is approximated by a variational RVB-type wave function. The holes interact by exchange of a localized spin excitation (SE), which is created or absorbed if a hole moves to a nearest-neighbour site. An SE can move over the sublattice on which it is created. A variational calculation of the GS and the GS-energy is performed for an open-ended 4 × 4 lattice with two holes with the restriction that the SE is neighbouring both holes and does not move over its sublattice. It is found that the two holes prefer a bound state in which their mutual distance is 1 or V2 (with lattice spacing 1).

AB - In this paper the Hubbard-Anderson model on a square lattice with two holes is studied. The ground state (GS) is approximated by a variational RVB-type wave function. The holes interact by exchange of a localized spin excitation (SE), which is created or absorbed if a hole moves to a nearest-neighbour site. An SE can move over the sublattice on which it is created. A variational calculation of the GS and the GS-energy is performed for an open-ended 4 × 4 lattice with two holes with the restriction that the SE is neighbouring both holes and does not move over its sublattice. It is found that the two holes prefer a bound state in which their mutual distance is 1 or V2 (with lattice spacing 1).

U2 - 10.1016/0378-4371(94)90037-X

DO - 10.1016/0378-4371(94)90037-X

M3 - Article

SN - 0378-4371

VL - 203

SP - 145

EP - 158

JO - Physica A

JF - Physica A

IS - 203

ER -

The two-hole ground state of the Hubbard-Anderson model, approximated by a variational RVB-type wave function

Abstract

Access to Document

Fingerprint

Cite this