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30 papers · 2 filters
Dynamical suppression of 1/f noise processes in qubit systems
Lara Faoro, Lorenza Viola
We investigate the capability of dynamical decoupling techniques to reduce decoherence from a realistic environment generating 1/f noise. The predominance of low frequency modes in…
Gaussian Decoherence from Random Spin Environments
W. H. Zurek, F. M. Cucchietti, J. P. Paz
We examine an exactly solvable model of decoherence - a spin-system interacting with a collection of environment spins. We show that in this model (introduced some time ago to illu…
Analytic solutions for quantum logic gates and modeling pulse errors in a quantum computer with a Heisenberg interaction
G. P. Berman, D. I. Kamenev, V. I. Tsifrinovich
We analyze analytically and numerically quantum logic gates in a one-dimensional spin chain with Heisenberg interaction. Analytic solutions for basic one-qubit gates and swap gate…
Quantum algorithms for phase space tomography
Juan Pablo Paz, Augusto J. Roncaglia, Marcos Saraceno
We present efficient circuits that can be used for the phase space tomography of quantum states. The circuits evaluate individual values or selected averages of the Wigner, Kirkwoo…
Symmetric Informationally Complete Quantum Measurements
Joseph M. Renes, Robin Blume-Kohout, A. J. Scott +1
We consider the existence in arbitrary finite dimensions d of a POVM comprised of d^2 rank-one operators all of whose operator inner products are equal. Such a set is called a ``sy…
Minimization of nonresonant effects in a scalable Ising spin quantum computer
G. P. Berman, D. I. Kamenev, V. I. Tsifrinovich
The errors caused by the transitions with large frequency offsets (nonresonant transitions) are calculated analytically for a scalable solid-state quantum computer based on a one-d…