Gedanken experiments help to reconcile our classical intuition with quantum mechanics and nowadays are routinely performed in the laboratory. An important open question is the quantum behavior of theâ€¦ (More)

We describe a solid state implementation of a quantum computer using ballistic single electrons as flying qubits in 1D nanowires. We show how to implement all the steps required for universal quantumâ€¦ (More)

We investigate topology change in 3D. Using Morse theory and handle decomposition we find the set of elementary cobordisms for 3-manifolds. These are: (i) Ã˜ â†” S 2 ; (ii) Î£ g â†” Î£ g+1 ; (iii) Î£ g 1 âŠ” Î£â€¦ (More)

We propose an experiment to test Bellâ€™s inequality violation in condensed-matter physics. We show how to generate, manipulate and detect entangled states using ballistic electrons in Coulomb-coupledâ€¦ (More)

In this letter we show that in a Kaluza-Klein framework we can have arbitrary topology change between the macroscopic (i.e. noncompactified) spacelike 3-hypersurfaces. This is achieved by using theâ€¦ (More)

Large scale quantum information processing (QIP) and distributed quantum computation require the ability to perform entangling operations on a large number of qubits. We describe a new photonicâ€¦ (More)

Simon J. Devitt, Andrew D. Greentree, Radu Ionicioiu, Jeremy L. Oâ€™Brien, William J. Munro, and Lloyd C. L. Hollenberg Centre for Quantum Computing Technology, School of Physics, University ofâ€¦ (More)

We calculate partition functions for lens spaces Lp,q up to p = 8 and for genus 1 and 2 handlebodies H1, H2 in the Turaev-Viro framework. These can be interpreted as transition amplitudes in 3Dâ€¦ (More)