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Trapped Ion Quantum Computing Using Optical Tweezers and Electric Fields.

M Mazzanti¹, R X Schüssler¹, J D Arias Espinoza¹

¹Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, 1098 XH Amsterdam, Netherlands.

Physical Review Letters

|January 14, 2022

Summary

This summary is machine-generated.

We introduce a scalable trapped ion quantum computing architecture using optical tweezers and electric fields for long-range interactions. This approach bypasses the need for ground-state cooling or the Lamb-Dicke approximation, enhancing scalability for quantum computers.

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Area of Science:

Quantum Computing
Atomic Physics
Quantum Information Science

Background:

Trapped ion quantum computers offer a promising platform for scalable quantum computation.
Current architectures face challenges in scalability and operational complexity.

Purpose of the Study:

To propose a novel, scalable architecture for trapped ion quantum computing.
To overcome limitations of existing methods by removing the need for ground-state cooling and the Lamb-Dicke approximation.

Main Methods:

Combining optical tweezers for state-dependent local potentials with oscillating electric fields for qubit interactions.
Utilizing the center-of-mass motion of ion crystals for scalable, long-range qubit-qubit interactions.
Analyzing the impact of imperfect cooling and qubit-motion entanglement.

Main Results:

Demonstrated a scalable architecture for trapped ion quantum computing.
Identified a method for long-range qubit interactions mediated solely by ion crystal motion.
Showcased a scheme that does not require ground-state cooling or the Lamb-Dicke approximation.

Conclusions:

The proposed architecture offers a scalable and potentially more robust approach to trapped ion quantum computing.
Further experimental investigation is warranted to realize the proposed state-dependent tweezers.