City Research Online

Abstract

We explore the feasibility of gate-based hybrid quantum computing using both discrete (qubit) and continuous (qumode) variables on trapped-ion platforms. Trapped-ion systems have demonstrated record one- and two-qubit gate fidelities and long qubit coherence times, while qumodes, which can be represented by the collective vibrational modes of the ion chain, have remained relatively unexplored for their use in computing. Using numerical simulations, we show that high-fidelity hybrid gates and measurement operations can be achieved for existing trapped-ion quantum platforms. As an exemplary application, we consider quantum simulations of the Jaynes-Cummings-Hubbard model, which is given by a one-dimensional chain of interacting spin and boson degrees of freedom. Using classical simulations, we study its real-time evolution and develop a suitable variational quantum algorithm for ground-state preparation. Our results should motivate further studies of hybrid quantum computing in this context, which may lead to direct applications in condensed-matter and fundamental particle and nuclear physics.

Publication Type:	Article
Additional Information:	This article has been published in its final form in Physical Review A by American Physical Society and it's available online at: https://doi.org/10.1103/kbv4-jj51
Publisher Keywords:	Lower-dimensional field theories, Quantum algorithms & computation, Quantum simulation
Subjects:	Q Science > QC Physics
Departments:	School of Science & Technology School of Science & Technology > Department of Engineering
SWORD Depositor:	Symplectic Administrator

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