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Decoherence suppression by parallelization

Roy, Kallol and Srikanth, R and Srinivas, T (2011) Decoherence suppression by parallelization. In: 3rd International Conference on Current Developments in Atomic, Molecular,Optical & Nano Physics with Applications, 14-16 December 2011 , University of Delhi, Delhi.

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Decoherence as an obstacle in quantum computation is viewed as a struggle between two forces [1]: the computation which uses the exponential dimension of Hilbert space, and decoherence which destroys this entanglement by collapse. In this model of decohered quantum computation, a sequential quantum computer loses the battle, because at each time step, only a local operation is carried out but g*(t) number of gates collapse. With quantum circuits computing in parallel way the situation is different- g(t) number of gates can be applied at each time step and number gates collapse because of decoherence. As g(t) ≈ g*(t) competition here is even [1]. Our paper improves on this model by slowing down g*(t) by encoding the circuit in parallel computing architectures and running it in Single Instruction Multiple Data (SIMD) paradigm. We have proposed a parallel ion trap architecture for single-bit rotation of a qubit.

Item Type: Conference Paper
Publisher: Laser Science and Technology Centre
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 27 Mar 2013 10:33
Last Modified: 28 Mar 2013 07:21
URI: http://eprints.iisc.ac.in/id/eprint/46114

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