Abstract
In recent years, there have been significant progress toward building a practical quantum computer, demonstrating key ingredients such as single-qubit gates and a two-qubit entangling gate. Among various physical platforms for a potential quantum computing processor, a trapped-ion system has been one of the most promising platforms due to long coherence times, high-fidelity quantum gates, and qubit connectivity. However, scaling up the number of qubits for a practical quantum computing faces a core challenge in operating high-fidelity quantum gates under influence from neighboring qubits. In particular, for the trapped-ion system, unwanted quantum crosstalk between qubits and ions’ quantum motional states hinder performing high-fidelity entanglement as the number of ions increases. In this review, we introduce a trapped-ion system and explain how to perform single-qubit gates and a two-qubit entanglement. Moreover, we mainly address theoretical and experimental approaches to achieve high-fidelity and scalable entanglement toward a trapped-ion based quantum computer.
Original language | English |
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Pages (from-to) | 163-177 |
Number of pages | 15 |
Journal | Current Applied Physics |
Volume | 41 |
DOIs | |
State | Published - Sep 2022 |
Bibliographical note
Funding Information:This work was funded by Samsung Research Funding Incubation Center of Samsung Electronics ( SRFC-IT1901-09 ) and by the National Research Foundation of Korea ( 2021M3E4A1038534 , 2022R1A4A2000835 , 2021R1A2C2095527 ).
Publisher Copyright:
© 2022 Korean Physical Society
Keywords
- Entanglement
- Quantum computer
- Single qubit gate
- Trapped ions
- Two qubit gate