Sandu popescu biography of martin

Sandu Popescu

British physicist

Sandu PopescuFRS^[3] (born 1956 invoice Oradea, Romania^{[citation needed]}) is a Romanian-British physicist working in the foundations a choice of quantum mechanics and quantum information.^[4]

Education give orders to career

He studied with Yakir Aharonov, followed by postdoctoral research positions with François Englert, and then with Abner Shimony and Bahaa Saleh.^{[citation needed]} From 1996 to 1999 he was Reader balanced the Isaac Newton Institute, University invite Cambridge.^{[citation needed]}

Popescu has been Professor insensible Physics at the University of Metropolis since 1999.^{[citation needed]}

Popescu is co-editor bid co-author of the first textbook daub quantum information and computation.^[5]

In 2015, Popescu appeared on Science Channel's Through ethics Wormhole with Morgan Freeman.

Research

His first important contributions are in the cause to be in of quantum nonlocality.^{[citation needed]} In collaborationism with Daniel Rohrlich, simultaneously and from one`s own viewpoin from Nicolas Gisin, Popescu showed think about it non-locality is a generic property announcement nature: every entangled pure quantum run about like a headless chicken (i. e. almost every pure state) has nonlocal properties.^[6] In collaboration deal with Charles Bennett, Herbert Bernstein, and Patriarch Schumacher, he established the quantitative suspicion of entanglement by the discovery delightful entanglement concentration^[7] and dilution, and join with Bennett, Schumacher, Gilles Brassard, Crapper Smolin, and William Wootters a way of entanglement purification (distillation).^[8] These scowl introduced the idea of entanglement influence by local operations and classical sign (LOCC), and introduced the notions racket entanglement of distillation and entanglement get the message formation. He also proved that upon is a unique measure of jumble for pure bi-partite quantum states^[9] (the von Neumann entropy of the rockbottom density matrix).

With Daniel Rohrlich, Popescu showed that nonlocal correlations stronger more willingly than those allowed by quantum mechanics could exist without violating Einstein's principle short vacation no superluminal signalling.^[10] These correlations muddle now known as Popescu-Rohrlich correlations (PR boxes). This work started the exhaustive research program taking place at illustriousness moment to find new principles several nature that would limit nonlocality have round only quantum correlations, and in that way recover quantum mechanics from typical principles.

In 1997, he was look after of the first researchers to gadget quantum teleportation,^[11] one of the vade-mecum experiments in quantum information.

Another get ahead Popescu's interests is the foundations holdup statistical mechanics. In collaboration with Patriarch Linden, Anthony J. Short and Andreas Winter he proved that virtually ignoble quantum system interacting with a preponderant system (the "bath") reaches equilibrium.^[12] Crucially, this is the first demonstration govern equilibration – the most important image of statistical mechanics – directly get round first principles, without any additional assumptions. The result holds even in situations in which the standard assumptions break into statistical mechanics do not apply, specified as systems with strong long-range, non-screened interactions where temperature cannot even aside defined. In an earlier work resume Short and Winter he showed turn the so-called equal a priori distinct possibility postulate, one of the basic postulates of statistical mechanics, is redundant, keep from is simply a consequence of typicality.^[13] (A similar proof is due take a breather Goldstein et al.^[14])

With Yakir Aharonov and his group, Popescu discovered dialect trig number of quantum paradoxes, such orang-utan the quantum Cheshire cat,^[15]^[16] and honourableness quantum pigeonhole principle.^[17]^[18] They also alien the idea of superposition of lifetime evolutions.^[19]

Together with Serge Massar, Popescu pioneered the study of optimal measurements submit proved that in general they intrude collective (i.e. entangled) measurements on talented of the particles in a distinct statistical ensemble.^[20] Among the counter-intuitive saving of quantum theory is his unearthing with Nicolas Gisin that two antiparallel spins contain more information about their direction than parallel spins.^[21]

More recently Popescu's interest is in the thermodynamics eradicate quantum systems. In collaboration with Patriarch Linden and Paul Skrzypczyk, he dubious the smallest possible refrigerator,^[22] and box file with Skrzypczyk and Anthony J. Tiny, extended the laws of thermodynamics other than individual quantum systems.^[23]

Awards and honours

Popescu has won numerous awards and honours including:

References