A stroboscopic approach to trapped-ion quantum information processing with squeezed phonons

Abstract

In trapped-ion quantum information processing, interactions between spins (qubits) are mediated by collective modes of motion of an ion crystal. While there are many different experimental strategies to design such interactions, they all face both technical and fundamental limitations to the achievable coherent interaction strength. In general, obtaining strong interactions and fast gates is an ongoing challenge. Here, we extend previous work [Phys. Rev. Lett. 112, 030501 (2019)] and present a general strategy for enhancing the interaction strengths in trapped-ion systems via parametric amplification of the ions' motion. Specifically, we propose a stroboscopic protocol using alternating applications of parametric amplification and spin-motion coupling. In comparison with the previous work, we show that the current protocol can lead to larger enhancements in the coherent interaction that increase exponentially with the gate time.

arXiv comment10 pages, 6 figures, comments are welcome

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Cited by in corpus (9)

• Quantum amplification and simulation of strong and ultrastrong coupling of light and matter
• Quantum amplification of boson-mediated interactions
• $N$-body interactions between trapped ion qubits via spin-dependent squeezing
• Towards Improved Quantum Simulations and Sensing with Trapped 2D Ion Crystals via Parametric Amplification
• Experimental speedup of quantum dynamics through squeezing
• Enhanced spin-mechanical interaction with levitated micromagnets
• Comparison of Spontaneous Emission in Trapped Ion Multiqubit Gates at High Magnetic Fields
• Schrödinger cat states of a macroscopic charged particle co-trapped with an ion
• Parametric Amplification of Spin-Motion Coupling in Three-Dimensional Trapped-Ion Crystals