Simulation of molecular spectroscopy with circuit quantum electrodynamics

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2018,（5）
• 页码范围: 293-299
• 页数: 7页
• 语种: 英文

摘要

Spectroscopy is a crucial laboratory technique for understanding quantum systems through their interactions with the electromagnetic radiation.Particularly,spectroscopy is capable of revealing the physical structure of molecules,leading to the development of the maser-the forerunner of the laser.However,real-world applications of molecular spectroscopy are mostly confined to equilibrium states,due to computational and technological constraints;a potential breakthrough can be achieved by utilizing the emerging technology of quantum simulation.Here we experimentally demonstrate through a toy model,a superconducting quantum simulator capable of generating molecular spectra for both equilibrium and non-equilibrium states,reliably producing the vibronic structure of diatomic molecules.Furthermore,our quantum simulator is applicable not only to molecules with a wide range of electronic-vibronic coupling strength,characterized by the Huang-Rhys parameter,but also to molecular spectra not readily accessible under normal laboratory conditions.These results point to a new direction for predicting and understanding molecular spectroscopy,exploiting the power of quantum simulation.