Adiabatic quantum computing is a quantum computing prototype that provides powerful insights to optimization problems and the generation of novel quantum states. A central challenge in the successful implementation of adiabatic quantum algorithms is to maintain quantum adiabaticity and keep the system in its ground state during the evolution. However, quantum adiabaticity can be vulnerable in interacting many-body systems with small energy gaps, where diabatic transitions out of the ground state can occur. Despite intensive efforts towards preserving quantum adiabaticity, an implementable method has yet to be developed. Here we present a universal and implementable approach to enhancing the quantum adiabaticity in a cavity QED scheme. Our numerical simulation on several models, including a NP-complete problem, confirms our theoretical result. This approach does not require the spectral knowledge of the adiabatic quantum computer or the construction of unphysical interactions.

Bio: Lin Tian received her Ph.D. in Physics in 2002 from the Massachusetts Institute of Technology. After holding research positions at Universität Innsbruck, NIST at Gaithersburg, and Stanford University, she joined the School of Natural Sciences at the University of California, Merced, in 2008. Her current research interests include theoretical questions in solid-state quantum computing, quantum simulation, hybrid quantum systems, optomechanics, decoherence and noise models.