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Inicio » Actividades I+D > Publicaciones 2002 > Quantum Computers in Phase Space
artículo con referato
"Quantum Computers in Phase Space"
C. Miquel, J.P. Paz and M. Saraceno
Phys. Rev. A 65(6) (2002) 062309/1-14
We represent both the states and the evolution of a quantum computer in phase space using the discrete Wigner function. We study properties of the phase space representation of quantum algorithms: apart from analyzing important examples, such as the Fourier transform and Grover's search, we examine the conditions for the existence of a direct correspondence between quantum and classical evolutions in phase space. Finally, we describe how to measure directly the Wigner function in a given phase-space point by means of a tomographic method that, itself, can be interpreted as a simple quantum algorithm.
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