831 citations · 8k across the 103 of their papers we have counts for
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Limitations of Passive Protection of Quantum Information
Fernando Pastawski, Alastair Kay, Norbert Schuch +1
The ability to protect quantum information from the effect of noise is one of the major goals of quantum information processing. In this article, we study limitations on the asympt…
Matrix Product State and mean field solutions for one-dimensional systems can be found efficiently
Norbert Schuch, J. Ignacio Cirac
We consider the problem of approximating ground states of one-dimensional quantum systems within the two most common variational ansatzes, namely the mean field ansatz and Matrix P…
Entanglement of the Antisymmetric State
Matthias Christandl, Norbert Schuch, Andreas Winter
We analyse the entanglement of the antisymmetric state in dimension d x d and present two main results. First, we show that the amount of secrecy that can be extracted from the sta…
Simulating two- and three-dimensional frustrated quantum systems with string-bond states
Alessandro Sfondrini, Javier Cerrillo, Norbert Schuch +1
Simulating frustrated quantum magnets is among the most challenging tasks in computational physics. We apply String-Bond States, a recently introduced ansatz which combines Tensor…
Ground-State Properties of Quantum Many-Body Systems: Entangled-Plaquette States and Variational Monte Carlo
Fabio Mezzacapo, Norbert Schuch, Massimo Boninsegni +1
We propose a new ansatz for the ground-state wave function of quantum many-body systems on a lattice. The key idea is to cover the lattice with plaquettes and obtain a state whose…
How long can a quantum memory withstand depolarizing noise?
Fernando Pastawski, Alastair Kay, Norbert Schuch +1
We investigate the possibilities and limitations of passive Hamiltonian protection of a quantum memory against depolarizing noise. Without protection, the lifetime of a single qubi…