133 citations · 289 across the 3 of their papers we have counts for
7 papers
Classicality in discrete Wigner functions
Cecilia Cormick, Ernesto F. Galvao, Daniel Gottesman +2
Gibbons et al. [Phys. Rev. A 70, 062101(2004)] have recently defined a class of discrete Wigner functions W to represent quantum states in a Hilbert space with finite dimension. We…
Discrete Wigner functions and quantum computational speedup
Ernesto F. Galvao
In [Phys. Rev. A 70, 062101 (2004)] Gibbons et al. defined a class of discrete Wigner functions W to represent quantum states in a finite Hilbert space dimension d. I characterize…
Foundations of quantum theory and quantum information applications
Ernesto F. Galvao
This thesis establishes a number of connections between foundational issues in quantum theory, and some quantum information applications. It starts with a review of quantum context…
Substituting a qubit for an arbitrarily large number of classical bits
Ernesto F. Galvao, Lucien Hardy
We show that a qubit can be used to substitute for an arbitrarily large number of classical bits. We consider a physical system S interacting locally with a classical field phi(x)…
Experimental requirements for quantum communication complexity protocols
Ernesto F. Galvao
I present a simple two-party quantum communication complexity protocol with higher success rate than the best possible classical protocol for the same task. The quantum protocol is…
Tripartite entanglement and quantum relative entropy
E. F. Galvao, M. B. Plenio, S. Virmani
We establish relations between tripartite pure state entanglement and additivity properties of the bipartite relative entropy of entanglement. Our results pertain to the asymptotic…