Quantum Computing by Coherent Cooling

Interesting problems in quantum computation take the form of finding low-energy states of (pseudo)spin systems with engineered Hamiltonians that encode the problem data. Motivated by the practical possibility of producing very low-temperature spin systems, we propose and exemplify the possibility to compute by coupling the computational spins to a quantum coherent bath that serves as a heat sink. The quantum tunneling effect provides additional cooling channels to accelerate the cooling process. We demonstrate both analytically and numerically that this strategy can achieve a quantum advantage in the unstructured search problem.

Automated summary

The research proposes the possibility of computing by coupling computational spins to a quantum coherent bath, utilizing the additional cooling channels provided by the quantum tunneling effect to accelerate the cooling process, and demonstrates a quantum advantage in the unstructured search problem.