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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Presenters
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Peter Schuhmacher
Theoretische Physik, Saarland University
Authors
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Lukas S Theis
Theoretische Physik, Saarland University
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Peter Schuhmacher
Theoretische Physik, Saarland University
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Michael Marthaler
Theoretische Physik, Saarland University, Institute for Theoretical Condensed Matter physics, Karlsruhe Institute of Technology
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Frank K Wilhelm
Theoretische Physik, Saarland University, Saarland University, Univ des Saarlandes