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We evaluate the performance of quantum arithmetic algorithms run on a distributed quantum computer (a quantum multicomputer). We vary the node capacity and I/O capabilities, and the network topology. The tradeoff of choosing between gates executed remotely, through “teleported gates” on entangled pairs of qubits (telegate), versus exchanging the… (More)

We evaluate the performance of quantum arithmetic algorithms run on a distributed quantum computer (a quantum multicomputer). We vary the node capacity and I/O capabilities, and the network topology. The tradeoff of choosing between gates executed remotely, through "teleported gates" on entangled pairs of qubits (telegate), versus exchanging the relevant… (More)

- George C. Knee, Stephanie Simmons, Erik M. Gauger, John J.L. Morton, Helge Riemann, Nikolai V. Abrosimov +6 others
- Nature communications
- 2012

The quantum superposition principle states that an entity can exist in two different states simultaneously, counter to our 'classical' intuition. Is it possible to understand a given system's behaviour without such a concept? A test designed by Leggett and Garg can rule out this possibility. The test, originally intended for macroscopic objects, has been… (More)

- Oussama Moutanabbir, Dieter Isheim, David N Seidman, Yoko Kawamura, Kohei M Itoh
- 2011

Using ultraviolet-laser assisted local-electrode atom-probe ͑UV-LEAP͒ tomography, we obtain three-dimensional ͑3D͒ atom-by-atom images of isotopically modulated 28 Si and 30 Si ultrathin layers having thicknesses in the range of 5–30 nm. The 3D images display interfaces between the different monoisotopic layers with an interfacial width of ϳ1.7 nm, thus… (More)

- Arne Laucht, Juha T. Muhonen, Fahd A. Mohiyaddin, Rachpon Kalra, Juan P. Dehollain, Solomon Freer +9 others
- Science advances
- 2015

Large-scale quantum computers must be built upon quantum bits that are both highly coherent and locally controllable. We demonstrate the quantum control of the electron and the nuclear spin of a single (31)P atom in silicon, using a continuous microwave magnetic field together with nanoscale electrostatic gates. The qubits are tuned into resonance with the… (More)

- Masashi Uematsu, Kohei M Itoh, Gennady Mil'nikov, Hideki Minari, Nobuya Mori
- Nanoscale research letters
- 2012

We have theoretically investigated the effects of random discrete distribution of implanted and annealed arsenic (As) atoms on device characteristics of silicon nanowire (Si NW) transistors. Kinetic Monte Carlo simulation is used for generating realistic random distribution of active As atoms in Si NWs. The active As distributions obtained through the… (More)

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