Radu Ionicioiu
Research Fellow
Email: radu.ionicioiu@hp.com
Phone: +44 (0)117 312 9984
FAX: +44 (0)117 312 9870
Location:
Quantum Information Processing Group
HewlettPackard Laboratories, Bristol
Radu graduated in 1991 with an MSc from University of Bucharest (Romania). He
obtained his PhD in 1999 (Cambridge, UK) with a thesis investigating topology
change in 3dimensional quantum gravity. His interest in the newly emerging
field of quantum computation was stimulated by the existence of an undecidable
problem in quantum gravity (4manifolds are unclassifiable) and by the natural
question if this would be solvable on a quantum computer (the answer,
disappointingly, turned out to be negative).
Before joining HP Labs in January 2007, Radu held postdoctoral positions at the
Institute for Scientific Interchange (ISI), Torino (20006), and in the
Engineering Department, Cambridge (19992000).
Research interests
 solidstate implementations of QIP, spintronic devices
 cluster state/measurement based QIP
 entanglement in highly correlated spin systems, Kitaev model,
topological gates
 new technologies for optical QIP
Publications
 M. Cozzini, R. Ionicioiu, P. Zanardi, Quantum fidelity and quantum phase
transitions in matrix product states, condmat/0611727.
 R. Ionicioiu, Entangling spins by measuring charge: a paritygate
toolbox; quantph/0609118.
 R. Ionicioiu, The parity gate: from quantum networks to entanglement
generation, Int. J. Quantum Information (2006, to appear).
 R. Ionicioiu, Spintronic devices as quantum networks, Laser Physics 16,
1444 (2006), Special Issue on Quantum Information; quantph/0512116.
 A. Hamma, R. Ionicioiu, P. Zanardi, Quantum entanglement in states
generated by bilocal group algebras, Phys. Rev. A 72, 012324 (2005);
quantph/0504049.
 A. Hamma, R. Ionicioiu, P. Zanardi, Bipartite entanglement and entropic
boundary law in lattice spin systems, Phys. Rev. A 71, 022315 (2005);
quantph/0409073.
 A. Hamma, R. Ionicioiu, P. Zanardi, Ground state entanglement and
geometric entropy in the Kitaev’s model, Phys. Lett. A 337, 22 (2005);
quantph/0406202.
 R. Ionicioiu, A.E. Popescu, Single spin measurement using spinorbital
entanglement, New J. Phys. 7, 120 (2005); quantph/0310047.
 A.E. Popescu, R. Ionicioiu, AllElectrical Quantum Computation with
Mobile Spin Qubits, Phys. Rev. B 69, 245422 (2004); condmat/0306401.
 R. Ionicioiu, I. D’Amico, An interferometric spinpolarizing device,
Semiconductor Science and Technology 19, S418 (2004).
 R. Ionicioiu, Quantum gates with topological phases, Phys. Rev. A 68,
034305 (2003); quantph/0304199.
 R. Ionicioiu, I. D’Amico, Mesoscopic SternGerlach device to polarize
spin currents, Phys. Rev. B 67, 041307(R) (2003); condmat/0207533.
 R. Ionicioiu, P. Zanardi, Quantum information processing in bosonic
lattices, Phys. Rev. A 66,
050301(R) (2002); quantph/0204118.
 A. Bertoni, R. Ionicioiu, P. Zanardi, F. Rossi and C. Jacoboni,
Simulation of entangled electronic states in semiconductor quantum wires,
Physica B 314, 10 (2002).
 P. Zanardi, I. D’Amico, R. Ionicioiu, E. Pazy, E. Biolatti, R. C.
Iotti, and F. Rossi, Quantum information processing using semiconductor
nanostructures, Physica B 314, 1 (2002).
 F. Rossi, E. Biolatti, R. C. Iotti, I. D’Amico, R. Ionicioiu, E.
Pazy, and P. Zanardi, Entanglement of
excitonic states and quantum information processing in semiconductors,
Physica Status Solidi 190,
817 (2002).
 E. Biolatti, I. D’Amico, R. Ionicioiu, P. Zanardi, and F. Rossi,
Ultrafast Quantum Information Processing in Nanostructured Semiconductors,
Superlattices and Microstructures 31,
107 (2002).
 R. Ionicioiu, P. Zanardi, and F. Rossi, Testing Bell’s Inequality with
Ballistic Electrons in Semiconductors, Phys. Rev. A 63, 050101(R) (2001);
quantph/0009026.
 R. Ionicioiu, G. Amaratunga, and F. Udrea, Quantum Computation with
Ballistic Electrons, International Journal of Modern Physics B 15, 125
(2001); quantph/0011051.
 R. Ionicioiu, Amplitudes for topology change in TuraevViro theory,
Classical and Quantum Gravity 15, 1885 (1998).
 R. Ionicioiu and R. M. Williams, Lens Spaces and Handlebodies in 3D
Quantum Gravity, Classical and Quantum Gravity 15, 3469 (1998); grqc/9806027.
 R. Ionicioiu, On a periodic iterative mapping (in Romanian), Rev.
Rom. Informatica & Automatica,
vol. 3, no. 3, 71 (1993).
