Mr. Chi Zhang Profile

Chi Zhang

at ETH Zurich

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Proceedings Article | 4 March 2019 Presentation + Paper

Towards fast and scalable trapped-ion quantum logic with integrated photonics

Karan Mehta, Chi Zhang, Stefanie Miller, Jonathan Home

Proceedings Volume 10933, 109330B (2019) https://doi.org/10.1117/12.2507647

KEYWORDS: Ions, Waveguides, Electrodes, Optical design, Integrated photonics, Quantum computing, Quantum information

Read Abstract +

Trapped-ion qubits promise certain fundamental advantages for quantum information processing (QIP), owing to their indistinguishability and relatively high isolation from noisy environments. Though these qualities have allowed demonstrations of the necessary primitives for quantum computation, the complexity of the optical apparatus required is a major impediment to implementation at scales where quantum systems offer a clear advantage over classical computers. Here, we build on previous work with trap-integrated waveguide optics, describing designs and simulations for commercial foundry-fabricated ion trap chips with integrated Si3N4 waveguides and grating couplers to implement multi-qubit operations. We detail a design intended to address and implement quantum logic gates between 5 ions in a single register, and a configuration which utilizes the stable on-chip path lengths of waveguide devices to enact a novel fast entangling two-qubit gate. The devices and approaches presented here could form elements of a scalable architecture for trapped-ion QIP.

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