### Abstract

An auxiliary system is derived via adiabatic connection. It is shown that in the ground state, the diagonal of the spin-dependent second-order density matrix n can be determined by solving a single auxiliary equation of a two-particle problem. Hence, the problem of an arbitrary system with even electrons can be reduced to a two particle problem.

Original language | English |
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Journal | Physical Review A |

Volume | 66 |

Issue number | 2 |

Publication status | Published - Aug 2002 |

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### ASJC Scopus subject areas

- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics

### Cite this

**Density-matrix functional theory.** / Nagy, A.

Research output: Contribution to journal › Article

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TY - JOUR

T1 - Density-matrix functional theory

AU - Nagy, A.

PY - 2002/8

Y1 - 2002/8

N2 - An auxiliary system is derived via adiabatic connection. It is shown that in the ground state, the diagonal of the spin-dependent second-order density matrix n can be determined by solving a single auxiliary equation of a two-particle problem. Hence, the problem of an arbitrary system with even electrons can be reduced to a two particle problem.

AB - An auxiliary system is derived via adiabatic connection. It is shown that in the ground state, the diagonal of the spin-dependent second-order density matrix n can be determined by solving a single auxiliary equation of a two-particle problem. Hence, the problem of an arbitrary system with even electrons can be reduced to a two particle problem.

UR - http://www.scopus.com/inward/record.url?scp=4243322793&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243322793&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:4243322793

VL - 66

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 2

ER -