Gap-independent cooling and hybrid quantum-classical annealing (HQCA)
ORAL
Abstract
We present an efficient gap-independent cooling scheme for a quantum annealer that
benefits from finite temperatures. We choose a system based on superconducting flux qubits as a
prominent example of current quantum annealing platforms. We propose coupling the qubit system
transversely to a coplanar waveguide to counter noise and heating that arise from always-present
longitudinal thermal noise. We provide a schematic circuit layout for the system and show how, for
feasible coupling strengths, we achieve global performance enhancements. Specifically, we achieve
cooling improvements of about 50% in the adiabatic and a few hundred percent in the non-adiabatic
regime, respectively.
benefits from finite temperatures. We choose a system based on superconducting flux qubits as a
prominent example of current quantum annealing platforms. We propose coupling the qubit system
transversely to a coplanar waveguide to counter noise and heating that arise from always-present
longitudinal thermal noise. We provide a schematic circuit layout for the system and show how, for
feasible coupling strengths, we achieve global performance enhancements. Specifically, we achieve
cooling improvements of about 50% in the adiabatic and a few hundred percent in the non-adiabatic
regime, respectively.
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The research is based upon work (partially) supported by the Office of the Director of National Intelligence (ODNI), Intelligence Advanced Research Projects Activity (IARPA), via the U.S. Army Research Office contract W911NF-17-C-0050.
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Presenters
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Peter Schuhmacher
- Theoretische Physik, Saarland University