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Direct observation of geometric phase in dynamics around a conical intersection with a trapped ion analog quantum simulator

Christophe H. Valahu, V. C. Olaya-Agudelo, Ryan J. MacDonell +6 more

We review our recent results in which we use trapped ions to observe geometric phase interference around a conical intersection [arXiv:2211.07320, 2022]. This is a key demonstration towards using mixed-qubit boson simulators to solve difficult chemical dynamics problems.

Quantum 2.0 Conference and ExhibitionJan 1, 20230 citations

Quantum simulation of conical intersections using trapped ions

Jacob Whitlow, Zhubing Jia, Ye Wang +3 more

Nature ChemistryAug 28, 202349 citations

Entanglement in trapped Rydberg ions via engineered conical intersections and addressing of individual-ions

Abdessamad Belfakir, Yousra Bouasria, HERSCHEL A. RABITZ +1 more

Annals of PhysicsJul 8, 20260 citations

Quantum Chemistry Calculations on a Trapped-Ion Quantum Simulator

Cornelius Hempel, Christine Maier, Jonathan Romero +10 more

Quantum-classical hybrid algorithms are a promising approach for near-term practical applications of quantum computers. A new experiment demonstrates how a trapped-ion implementation of one such algorithm solves a quantum chemistry problem.

arXiv:1803.10238Physical Review XJul 24, 2018607 citations

Seeking a quantum advantage with trapped-ion quantum simulations of condensed-phase chemical dynamics

Mingyu Kang, Hanggai Nuomin, Sutirtha N. Chowdhury +8 more

arXiv:2305.03156Nature Reviews ChemistryApr 19, 202433 citations

Observation of Wave-Packet Branching through an Engineered Conical Intersection

Christopher S. Wang, Nicholas Frattini, Benjamin J. Chapman +4 more

Analog quantum simulators, which efficiently represent model systems, have the potential to provide new insight toward naturally occurring phenomena beyond the capabilities of classical computers.Incorporating dissipation as a resource unlocks a wider range of out-of-equilibrium processes such as chemical reactions.Here, we operate a hybrid qubit-oscillator circuit quantum electrodynamics simulator and model nonadiabatic molecular dynamics through a conical intersection.We identify dephasing of the electronic qubit as the mechanism that drives wave-packet branching when the corresponding oscillator undergoes large amplitude motion.Furthermore, we directly observe enhanced branching when the wave-packet passes through the conical intersection.Thus, the forces that influence a chemical reaction can be viewed from the perspective of measurement backaction in quantum mechanics-there is an effective measurement-induced dephasing rate that depends on the position of the wave packet relative to the conical intersection.Our results set the groundwork for more complex simulations of chemical dynamics using quantum simulators, offering deeper insight into the role of dissipation in determining macroscopic quantities of interest such as the quantum yield of a chemical reaction.Analog quantum simulators, which efficiently represent model systems, have the potential to provide new insight toward naturally occurring phenomena beyond the capabilities of classical computers.Incorporating dissipation as a resource unlocks a wider range of out-of-equilibrium processes such as chemical reactions.Here, we operate a hybrid qubit-oscillator circuit quantum electrodynamics simulator and model nonadiabatic molecular dynamics through a conical intersection.We identify dephasing of the electronic qubit as the mechanism that drives wave-packet branching when the corresponding oscillator undergoes large amplitude motion.Furthermore, we directly observe enhanced branching when the wave-packet passes through the conical intersection.Thus, the forces that influence a chemical reaction can be viewed from the perspective of measurement backaction in quantum mechanics-there is an effective measurement-induced dephasing rate that depends on the position of the wave packet relative to the conical intersection.Our results set the groundwork for more complex simulations of chemical dynamics using quantum simulators, offering deeper insight into the role of dissipation in determining macroscopic quantities of interest such as the quantum yield of a chemical reaction.

arXiv:2202.02364Physical Review XJan 26, 202340 citations

Analog quantum simulation of chemical dynamics

Abstract

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Analog quantum simulation of chemical dynamics

Abstract

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