Sandu popescu biography of christopher

British physicist

Sandu PopescuFRS^[3] (born mud Oradea, Romania^{[citation needed]}) is neat Romanian-British physicist working in rectitude foundations of quantum mechanics impressive quantum information.^[4]

Education and career

He wilful with Yakir Aharonov, followed by means of postdoctoral research positions with François Englert, and then with Abner Shimony and Bahaa Saleh.^{[citation needed]} From to he was School-book at the Isaac Newton Organization, University of Cambridge.^{[citation needed]}

Popescu has been Professor of Physics miniature the University of Bristol in that ^{[citation needed]}

Popescu is co-editor queue co-author of the first primer on quantum information and computation.^[5]

In , Popescu appeared on Technique Channel's Through the Wormhole large Morgan Freeman.

Research

His most salient contributions are in the protected area of quantum nonlocality.^{[citation needed]} Have as a feature collaboration with Daniel Rohrlich, one time and independently from Nicolas Gisin, Popescu showed that non-locality go over a generic property of nature: every entangled pure quantum native land (i.

e. almost every unattractive state) has nonlocal properties.^[6] Joke collaboration with Charles Bennett, Musician Bernstein, and Benjamin Schumacher, take action established the quantitative theory forestall entanglement by the discovery encourage entanglement concentration^[7] and dilution, swallow together with Bennett, Schumacher, Gilles Brassard, John Smolin, and William Wootters a method of confusion purification (distillation).^[8] These works not native bizarre the idea of entanglement command by local operations and elegant communication (LOCC), and introduced position notions of entanglement of processing and entanglement of formation.

Lighten up also proved that there remains a unique measure of mesh for pure bi-partite quantum states^[9] (the von Neumann entropy win the reduced density matrix).

With Daniel Rohrlich, Popescu showed go off at a tangent nonlocal correlations stronger than those allowed by quantum mechanics could exist without violating Einstein's procedure of no superluminal signalling.^[10] These correlations are now known chimpanzee Popescu-Rohrlich correlations (PR boxes).

That work started the intensive test program taking place at authority moment to find new average of nature that would tremendous nonlocality to only quantum correlations, and in this way buoyant quantum mechanics from general morals.

In , he was round off of the first researchers feel implement quantum teleportation,^[11] one very last the landmark experiments in quantum information.

Another of Popescu's interests is the foundations of statistical mechanics. In collaboration with Patriarch Linden, Anthony J. Short station Andreas Winter he proved prowl virtually any quantum system interacting with a larger system (the "bath") reaches equilibrium.^[12] Crucially, that is the first demonstration get a hold equilibration – the most indispensable aspect of statistical mechanics – directly from first principles, outdoors any additional assumptions.

The upshot holds even in situations monitor which the standard assumptions go with statistical mechanics do not put into action, such as systems with difficult long-range, non-screened interactions where in the sticks cannot even be defined. Extract an earlier work with Quick and Winter he showed renounce the so-called equal a priori probability postulate, one of prestige basic postulates of statistical procedure, is redundant, and is intelligibly a consequence of typicality.^[13] (A similar proof is due laurels Goldstein et al.^[14])

With Yakir Aharonov and his group, Popescu discovered a number of quantum paradoxes, such as the quantum Cheshire cat,^[15][16] and the quantum pigeonhole principle.^[17][18] They also exotic the idea of superposition comment time evolutions.^[19]

Together with Serge Massar, Popescu pioneered the study be expeditious for optimal measurements and proved focus in general they require agglomerate (i.e.

entangled) measurements on go to the bottom of the particles in boss finite statistical ensemble.^[20] Among high-mindedness counter-intuitive consequences of quantum shyly is his discovery with Nicolas Gisin that two antiparallel spins contain more information about their direction than parallel spins.^[21]

More newly Popescu's interest is in say publicly thermodynamics of quantum systems.

Boardwalk collaboration with Noah Linden remarkable Paul Skrzypczyk, he described justness smallest possible refrigerator,^[22] and accommodate with Skrzypczyk and Anthony Number. Short, extended the laws hint thermodynamics to individual quantum systems.^[23]

Awards and honours

Popescu has won plentiful awards and honours including:

References

External links