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Thermally Assisted Adiabatic Quantum Computation.
Amin, M.H.S.
Love, Peter J.
Truncik, C.J.S.
2008.
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Description
We study the effect of a thermal environment on adiabatic quantum computation using the Bloch-Redfield formalism. We show that in certain cases the environment can enhance the performance in two different ways: (i) by introducing a time scale for thermal mixing near the anticrossing that is smaller than the adiabatic time scale, and (ii) by relaxation after the anticrossing. The former can enhance
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the scaling of computation when the environment is super-Ohmic, while the latter can only provide a prefactor enhancement. We apply our method to the case of adiabatic Grover search and show that performance better than classical is possible with a super-Ohmic environment, with no a priori knowledge of the energy spectrum. © 2008 The American Physical Society.
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Creator department
Tufts University. Department of Physics and Astronomy.
Subject
Quantum computing.
Permanent URL
http://hdl.handle.net/10427/014386
Citation
Amin, M. H. S., Peter J. Love, and C. J. S. Truncik. "Thermally Assisted Adiabatic Quantum Computation." Physical Review Letters 100, no. 6 (February 12, 2008). doi:10.1103/physrevlett.100.060503.
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bz60d772n
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