Abstract:  No process in nature can perfectly clone an arbitrary quantum state. But is it possible to engineer processes that replicate quantum information with vanishingly small error? Here we demonstrate the possibility of probabilistic super-replication phenomena where N equally prepared quantum clocks are transformed into a much larger number of M nearly perfect replicas, with an error that rapidly vanishes whenever M is small compared to the square of N. The quadratic replication rate is the ultimate limit imposed by Quantum Mechanics to the proliferation of information and is fundamentally linked with the Heisenberg limit of quantum metrology. 
 

About the Speaker: Giulio Chiribella is an Associate Professor at the Institute for Interdisciplinary Information Sciences (IIIS), Tsinghua University. He completed his education at the University of Pavia, Italy, first as a student of the "Almo Collegio Borromeo" (1998-2003) and later at the Advanced School of Integrated Education, Institute for Advanced Studies (2003-2006). Before joining the faculty at IIIS in 2012, he held research positions at the University of Pavia (2006-2009) and at the Perimeter Institute for Theoretical Physics (2009-2012) in Waterloo, Canada, where he was also affiliated to the Institute of Quantum Computing. He was awarded the "Hermann Weyl Prize 2010". His main research interests are in Quantum Information Theory, Quantum Foundations, and Mathematical Physics.