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6 papers · 2 filters
Tunable joint measurements in the dispersive regime of cavity QED
Kevin Lalumière, J. M. Gambetta, Alexandre Blais
Joint measurements of multiple qubits have been shown to open new possibilities for quantum information processing. Here, we present an approach based on homodyne detection to real…
Quantum Metropolis Sampling
K. Temme, T. J. Osborne, K. G. Vollbrecht +2
The original motivation to build a quantum computer came from Feynman who envisaged a machine capable of simulating generic quantum mechanical systems, a task that is believed to b…
Fast Decoders for Topological Quantum Codes
Guillaume Duclos-Cianci, David Poulin
We present a family of algorithms, combining real-space renormalization methods and belief propagation, to estimate the free energy of a topologically ordered system in the presenc…
Coarse grained belief propagation for simulation of interacting quantum systems at all temperatures
Ersen Bilgin, David Poulin
We continue our numerical study of quantum belief propagation initiated in [Phys. Rev. A, 77 (2008), p. 052318]. We demonstrate how the method can be expressed in terms of an effec…
Tradeoffs for reliable quantum information storage in 2D systems
Sergey Bravyi, David Poulin, Barbara Terhal
We ask whether there are fundamental limits on storing quantum information reliably in a bounded volume of space. To investigate this question, we study quantum error correcting co…
Sampling from the thermal quantum Gibbs state and evaluating partition functions with a quantum computer
David Poulin, Pawel Wocjan
We present a quantum algorithm to prepare the thermal Gibbs state of interacting quantum systems. This algorithm sets a universal upper bound D^alpha on the thermalization time of…