Search Results - "Sandvik, A W"

Variational quantum Monte Carlo simulations with tensor-network states by Sandvik, A W, Vidal, G

“…We show that the formalism of tensor-network states, such as the matrix-product states (MPS), can be used as a basis for variational quantum Monte Carlo…”
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Microscopic theory of non-adiabatic response in real and imaginary time by De Grandi, C, Polkovnikov, A, Sandvik, A W

“…We present a general approach to describe slowly driven quantum systems both in real and imaginary time. We highlight many similarities, qualitative and…”
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Comment on "quantum phase transition of the randomly diluted Heisenberg antiferromagnet on a square lattice" by Sandvik, A W

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Performance of the quantum adiabatic algorithm on random instances of two optimization problems on regular hypergraphs by Farhi, Edward, Gosset, David, Hen, Itay, Sandvik, A. W., Shor, Peter, Young, A. P., Zamponi, Francesco

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Effect of an electron-phonon interaction on the one-electron spectral weight of a d -wave superconductor by Sandvik, A. W., Scalapino, D. J., Bickers, N. E.

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Quantum Critical Scaling and Temperature-Dependent Logarithmic Corrections in the Spin-Half Heisenberg Chain by Starykh, O. A., Singh, R. R. P., Sandvik, A. W.

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Theory of the magnetic phase diagram of LiHoF4 by CHAKRABORTY, P. B, HENELIUS, P, KJØNSBERG, H, SANDVIK, A. W, GIRVIN, S. M

“…The properties of LiHoF4 are believed to be well described by a long-range dipolar Ising model. We go beyond mean-field theory and calculate the phase diagram…”
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Ground-state phases and quantum phase transitions in a two-dimensional spin-1/2 XY model with four-spin interactions by Sandvik, A.W., Melko, R.G.

“…We discuss the ground state phase transition between an antiferromagnet and a valence-bond solid in a two-dimensional spin-1/2 XY model with a four-spin…”
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Striped phase in a quantum XY model with ring exchange by Sandvik, A W, Daul, S, Singh, R R P, Scalapino, D J

“…We present quantum Monte Carlo results for a square-lattice S=1/2 XY model with a standard nearest-neighbor coupling J and a four-spin ring exchange term K…”
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Universal nonequilibrium quantum dynamics in imaginary time by De Grandi, C., Polkovnikov, A., Sandvik, A. W.

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High-energy magnon dispersion and multimagnon continuum in the two-dimensional Heisenberg antiferromagnet by Sandvik, A W, Singh, R R

“…We use quantum Monte Carlo simulations and numerical analytic continuation to study high-energy spin excitations in the two-dimensional S = 1/2 Heisenberg…”
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Phase separation and the existence of superconductivity in a one-dimensional copper-oxygen model by Sandvik, AW, Sudbo, A

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Finite frequency phonon effects in spin-Peierls systems by Sandvik, A.W., Campbell, D.K.

“…Using a novel approximation-free quantum Monte Carlo method, we study finite-frequency phonon effects in a spin-1/2 Heisenberg chain with the nearest-neighbor…”
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Two-dimensional quantum XY model with ring exchange and external field by Melko, R. G., Sandvik, A. W., Scalapino, D. J.

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Order-disorder transition in a two-layer quantum antiferromagnet by Sandvik, AW, Scalapino, DJ

“…We have studied the antiferromagnetic order-disorder transition occurring at [ital T]=0 in a two-layer quantum Heisenberg antiferromagnet as the interplane…”
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Quantum Monte Carlo in the interaction representation: Application to a spin-Peierls model by Sandvik, A. W., Singh, R. R. P., Campbell, D. K.

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Absence of superconductivity in the 1d extended hubbard model with repulsive interactions by Clay, R.T., Sandvik, A.W., Campbell, D.K.

“…We investigate numerically the ground state of the 1D extended Hubbard model, with on-site interaction U and nearest-neighbor interaction V. We focus V U, U ~…”
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Crossover effects in the random-exchange spin-1/2 antiferromagnetic chain by LAFLORENCIE, Nicolas, RIEGER, Heiko, SANDVIK, Anders W, HENELIUS, Patrik

“…The random antiferromagnetic spin-1/2 XX and XXZ chain is studied numerically for varying strength of the disorder, using exact diagonalization and stochastic…”
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Quantum phase transitions in 2D antiferromagnets by SANDVIK, A. W, VEKIC, M

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Interplane relaxation and the bilayer coupling in Y2Ba4Cu7O15 by MONIEN, H, SANDVIK, A. W

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