Improving Trapped Ion Quantum Information Processing Through Parametric Amplification
Abstract
Trapped ion crystals are a leading platform for quantum information processing. Interactions between the trapped-ion qubits (or spins) are generated through spin-dependent forces that couple an ion’s spin to the collective motional modes (or phonons) of the trapped-ion crystal. Generating strong, coherent spin-spin interactions remains a challenge, but a new strategy has been recently proposed to enhance the coherent interactions through parametric amplification of the ions’ motion. Specifically, by driving the collective motional modes (or phonons) of the trapped-ion crystal, the spin-spin interactions mediated by the phonons can be significantly enhanced. The driving, frequently called parametric amplification, consists of a simple modulation of the potential of the ion trap at a frequency close to twice a motional frequency of the ions. Here I propose to experimentally demonstrate and investigate parametric amplification of spin-spin interactions induced through spin-dependent optical dipole forces in two-dimensional trapped-ion crystals stored in a Penning trap. The Penning trap employs static electric and magnetic fields to confine ions, enabling the formation and control of single-plane crystals of up to three hundred ions in the lab. Strengthening the engineered spin-spin interactions with large ion crystals in a Penning trap will improve the fidelity of a global entangling gate, which we will use to investigate the generation of spin states with large quantum Fisher information that are useful for quantum sensing. The work proposed here can enable variational quantum simulation with a large number of qubits, and in general will greatly help in determining the utility of parametric amplification in strengthening engineered spin-spin interactions for a broad array of trapped-ion platforms and quantum information processing tasks.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2021
- Source ID
- FA95502010019
Entities
People
- Andrew Timothy Wilson
Organizations
- Air Force Office of Scientific Research
- Regents of the University of Colorado
- United States Air Force