Sandu popescu biography of mahatma

In particular I designed and participated to the first teleportation experiment, one of the most famous experiments in the field of quantum information.

Sandu Popescu FRS [ 6 ] born in Oradea , Romania [ 7 ] is a Romanian-British physicist working in the foundations of quantum mechanics and quantum information. Popescu has been Professor of Physics at the University of Bristol since Popescu is co-editor and co-author of the first textbook on quantum information and computation. His most important contributions are in the area of quantum nonlocality.

He also proved that there is a unique measure of entanglement for pure bi-partite quantum states [ 17 ] the von Neumann entropy of the reduced density matrix.

He studied with Yakir Aharonov, followed by postdoctoral research positions with François Englert, and then with Abner Shimony and Bahaa Saleh.

With Daniel Rohrlich, Popescu showed that nonlocal correlations stronger than those allowed by quantum mechanics could exist without violating Einstein's principle of no superluminal signalling. This work started the intensive research program taking place at the moment to find new principles of nature that would limit nonlocality to only quantum correlations, and in this way recover quantum mechanics from general principles.

In , he was one of the first researchers to implement quantum teleportation, [ 19 ] one of the landmark experiments in quantum information. Another of Popescu's interests is the foundations of statistical mechanics. In collaboration with Noah Linden, Anthony J. Short and Andreas Winter he proved that virtually any quantum system interacting with a larger system the "bath" reaches equilibrium.

The result holds even in situations in which the standard assumptions of statistical mechanics do not apply, such as systems with strong long-range, non-screened interactions where temperature cannot even be defined. In an earlier work with Short and Winter he showed that the so-called equal a priori probability postulate, one of the basic postulates of statistical mechanics, is redundant, and is simply a consequence of typicality.

With Yakir Aharonov and his group, Popescu discovered a number of quantum paradoxes, such as the quantum Cheshire cat , [ 23 ] [ 24 ] and the quantum pigeonhole principle. Together with Serge Massar, Popescu pioneered the study of optimal measurements and proved that in general they require collective i.