313 citations · 739 across the 11 of their papers we have counts for
6 papers · 2 filters
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…
Phase-space approach to the study of decoherence in quantum walks
C. C. Lopez, J. P. Paz
We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nat…
Decoherence and recoherence from vacuum fluctuations near a conducting plate
Francisco D. Mazzitelli, Juan Pablo Paz, Alejandro Villanueva
The interaction between particles and the electromagnetic field induces decoherence generating a small suppression of fringes in an interference experiment. We show that if a doubl…
A quantum gate array can be programmed to evaluate the expectation value of any operator
Juan Pablo Paz, Augusto Roncaglia
A programmable gate array is a circuit whose action is controlled by input data. In this letter we describe a special--purpose quantum circuit that can be programmed to evaluate th…
A Method for Modeling Decoherence on a Quantum Information Processor
G. Teklemariam, E. M. Fortunato, C. C. Lopez +4
We develop and implement a method for modeling decoherence processes on an N-dimensional quantum system that requires only an -dimensional quantum environment and random class…
Testing integrability with a single bit of quantum information
David Poulin, Raymond Laflamme, G. J. Milburn +1
We show that deterministic quantum computing with a single bit (DQC1) can determine whether the classical limit of a quantum system is chaotic or integrable using O(N) physical res…