TL;DR
This paper presents methods for universal quantum computation using minimal control over large quantum systems, employing analytic pulse sequences for gates and cooling that are practical and require limited pulse strength.
Contribution
It introduces simple protocols and analytic pulse sequences enabling universal quantum computation with fixed control on a small subset of spins, reducing engineering complexity.
Findings
Deterministic gate operations achieved with analytic pulses
Cooling protocols compatible with system Hamiltonian
Reduced control requirements for large quantum systems
Abstract
Simple constructions and protocols are demonstrated to allow the implementation of universal quantum computation on an arbitrarily large quantum system by controlling a fixed number of spins, vastly reducing the engineering requirements in comparison to a direct implementation of the circuit model. Analytic pulse sequences are derived for deterministic gate operation and system cooling which only require pulse strengths that are comparable to the intrinsic Hamiltonian of the system.
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