Self-protected adiabatic quantum computation

TL;DR

This paper explores using decoherence-free subspaces to enable robust adiabatic quantum computation, specifically applying it to Grover's search with only two-body interactions for near-term quantum devices.

Contribution

It introduces a passive protection protocol for adiabatic quantum computation in decoherence-free subspaces, suitable for continuous quantum processes like quantum annealing.

Findings

Decoherence-free subspace approach enhances robustness against collective decoherence.

Proposes a feasible two-body interaction scheme for protected adiabatic quantum computation.

Application demonstrated for Grover's search problem.

Abstract

Recent experiments show the existence of collective decoherence in quantum systems. We study the possibility of quantum computation in decoherence free subspace which is robust against such kind of decoherence processes. This passive protection protocol can be especially advantageous for continuous quantum computation such as quantum annealers. As an example we propose to use decoherence protected adiabatic quantum computation for the Grover search problem. Our proposal contains only two-body interactions, making it feasible in near-term quantum devices.