Science Daily June 15, 2021
Variational quantum eigensolvers (VQEs) combine classical optimization with efficient cost function evaluations on quantum computers. An international team of researcher (Canada, Austria, Germany) proposed a new approach to VQEs using the principles of measurement-based quantum computation. This strategy uses entangled resource states and local measurements. They have presented two measurement based VQE schemes. The first introduces a new approach for constructing variational families. The second provides a translation of circuit to measurement-based schemes. Both schemes offer problem-specific advantages in terms of the required resources and coherence times. The algorithm offers high error tolerance, often an issue in quantum systems, and works for a wide range of quantum systems, including photonic quantum co-processors. By removing the reliance on quantum gates, the team has removed the struggle with finicky and delicate resources and instead by using entangled quantum states they believe they will be able to design feedback loops that can be tailored to the datasets that the computers are researching in a more efficient manner…read more. TECHNICAL ARTICLE
MB-VQE schemes… Credit: Phys. Rev. Lett. 126, 220501, 1 June 2021Â