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Article overview
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Circuit design for multi-body interactions in superconducting quantum annealing system with applications to a scalable architecture | Nicholas Chancellor
; Stefan Zohren
; Paul A. Warburton
; | Date: |
31 Mar 2016 | Abstract: | Quantum annealing provides a way of solving optimization problems by encoding
them as Ising spin models which are implemented using physical qubits. The
solution of the optimisation problem then corresponds to the ground state of
the system. Quantum tunnelling is harnessed to enable the system to move to the
ground state in a potentially highly non-convex energy landscape. A major
difficulty in encoding optimization problems in physical quantum annealing
devices is the fact that many real world optimisation problems require
interactions of higher connectivity as well as multi-body terms beyond the
limitations of the physical hardware. In this work we address the question of
how to implement multi-body interactions using hardware which natively only
provides two-body interactions. The main result is an efficient circuit design
of such multi-body terms using superconducting flux qubits. It is then shown
how this circuit can be used as a unit cell of a scalable architecture by
applying it to a recently proposed embedding technique for constructing an
architecture of logical qubits with arbitrary connectivity using physical
qubits which have nearest-neighbour four-body interactions. | Source: | arXiv, 1603.9521 | Services: | Forum | Review | PDF | Favorites |
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