Reducing Constraints on Quantum Computer Design by Encoded Selective Recoupling

Details Reducing Constraints on Quantum Computer Design by Encoded Selective Recoupling Reducing Constraints on Quantum Computer Design by Encoded Selective Recoupling

2001-09-04

arxiv.org/abs/quant-ph/0109021v3

Phys. Rev. Let. 88, 017905 (2002)

Physics

Quantum Physics

5 pages, 1 table, no figures. Published version

Scientific paper

10.1103/PhysRevLett.88.017905

The requirement of performing both single-qubit and two-qubit operations in the implementation of universal quantum logic often leads to very demanding constraints on quantum computer design. We show here how to eliminate the need for single-qubit operations in a large subset of quantum computer proposals: those governed by isotropic and XXZ,XY-type anisotropic exchange interactions. Our method employs an encoding of one logical qubit into two physical qubits, while logic operations are performed using an analogue of the NMR selective recoupling method.

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