منابع مشابه
Pattern Formation in Quantum Turing Machines
We investigate the iteration of a sequence of local and pair unitary transformations, which can be interpreted to result from a Turing-head (pseudo-spin S) rotating along a closed Turing-tape (M additional pseudo-spins). The dynamical evolution of the Bloch-vector of S, which can be decomposed into 2M primitive pure state Turing-head trajectories, gives rise to fascinating geometrical patterns ...
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In this Letter we report on the spontaneous formation of surprisingly regular periodic magnetic patterns in an antiferromagnetic Bose-Einstein condensate (BEC). The structures evolve within a quasi-one-dimensional BEC of 87Rb atoms on length scales of a millimeter with typical periodicities of 20…30 μm, given by the spin healing length. We observe two sets of characteristic patterns which can ...
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Marcus Schaffry,1 Erik M. Gauger,1 John J. L. Morton,2 Joseph Fitzsimons,1,3 Simon C. Benjamin,1,4 and Brendon W. Lovett1,5 1Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom 2CAESR, The Clarendon Laboratory, Department of Physics, University of Oxford, OX1 3PU, United Kingdom 3Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, Ca...
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Quantum mechanics provides a mechanism for absolutely secure communication between remote parties. For distances greater than 100 km, direct quantum communication via optical fiber is not viable, owing to fiber losses, and intermediate storage of the quantum information along the transmission channel is necessary. This leads to the concept of the quantum repeater, proposed by Briegel et al. [Ph...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics B
سال: 2006
ISSN: 0217-9792,1793-6578
DOI: 10.1142/s0217979206033875