A density matrix is a matrix that describes a quantum system in a mixed state, a statistical ensemble of several quantum states. This should be… (More)

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Highly Cited

2009

Highly Cited

2009

- Eric Polizzi
- ArXiv
- 2009

A new numerical algorithm for solving the symmetric eigenvalue problem is presented. The technique deviates fundamentally from… (More)

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2007

2007

- I. McCulloch
- 2007

In this paper we give an introduction to the numerical density matrix renormalization group (DMRG) algorithm, from the… (More)

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Review

2005

Review

2005

The density-matrix renormalization group sDMRGd is a numerical algorithm for the efficient truncation of the Hilbert space of low… (More)

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Highly Cited

2005

Highly Cited

2005

- Joost VandeVondele, Matthias Krack, Fawzi Mohamed, Michele Parrinello, Thomas Chassaing, Jürg Hutter
- Computer Physics Communications
- 2005

We present the Gaussian and plane waves (GPW) method and its implementation in QUICKSTEP which is part of the freely available… (More)

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2002

2002

- Timothy F. Havel
- Quantum Information Processing
- 2002

We introduce a nonsymmetric real matrix which contains all the information that the usual Hermitian density matrix does, and… (More)

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Highly Cited

2001

Highly Cited

2001

- Andreas Wacker
- 2001

Stationary electric transport in semiconductor nanostructures is studied by the method of nonequilibrium Green functions. In the… (More)

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Review

1999

Review

1999

The Density Matrix Renormalization Group (DMRG) has become a powerful numerical method that can be applied to low-dimensional… (More)

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1998

1998

- Gregory Beylkin, Nicholas Coult, Martin J. Mohlenkamp
- 1998

We present a fast algorithm for the construction of a spectral projector. This algorithm allows us to compute the density matrix… (More)

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Highly Cited

1996

Highly Cited

1996

- Pérès
- Physical review letters
- 1996

A quantum system consisting of two subsystems is separable if its density matrix can be written as ρ = ∑ A wA ρ ′ A ⊗ ρ ′′ A… (More)

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Highly Cited

1995

Highly Cited

1995

- Schumacher
- Physical review. A, Atomic, molecular, and…
- 1995

A theorem is proven for quantum information theory that is analogous to the noiseless coding theorem of classical information… (More)

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