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Quantum annealing via environment-mediated quantum diffusion
Vadim N. Smelyanskiy, Davide Venturelli, Alejandro Perdomo-Ortiz +2
We show that quantum diffusion near the quantum critical point can provide a highly very efficient mechanism of open-system quantum annealing. It is based on the diffusion-mediated…
Understanding Quantum Tunneling through Quantum Monte Carlo Simulations
Sergei V. Isakov, Guglielmo Mazzola, Vadim N. Smelyanskiy +4
The tunneling between the two ground states of an Ising ferromagnet is a typical example of many-body tunneling processes between two local minima, as they occur during quantum ann…
Open system quantum annealing in mean field models with exponential degeneracy
Kostyantyn Kechedzhi, Vadim N. Smelyanskiy
Real life quantum computers are inevitably affected by intrinsic noise resulting in dissipative non-unitary dynamics realized by these devices. We consider an open system quantum a…
Determination and correction of persistent biases in quantum annealers
Alejandro Perdomo-Ortiz, Bryan O'Gorman, Joseph Fluegemann +2
Calibration of quantum computing technologies is essential to the effective utilization of their quantum resources. Specifically, the performance of quantum annealers is likely to…
A Performance Estimator for Quantum Annealers: Gauge selection and Parameter Setting
Alejandro Perdomo-Ortiz, Joseph Fluegemann, Rupak Biswas +1
With the advent of large-scale quantum annealing devices, several challenges have emerged. For example, it has been shown that the performance of a device can be significantly affe…
Computational Role of Multiqubit Tunneling in a Quantum Annealer
Sergio Boixo, Vadim N. Smelyanskiy, Alireza Shabani +7
Quantum tunneling, a phenomenon in which a quantum state traverses energy barriers above the energy of the state itself, has been hypothesized as an advantageous physical resource…