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Future Prospects of Quantum Chips and Their Applications

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Special Issue Information

Dear Colleagues,

Quantum chips are designed to manipulate, store, and process quantum information, making them ideal for solving complex problems beyond the reach of classical computing. They also enable secure quantum communications and enhanced quantum sensing beyond the classical limit. Although the development of quantum chips is still in its early stages, significant progress has been made in recent years.

In this Special Issue, we aim to provide a platform for researchers and experts in the field of quantum computing to share their insights and perspectives on the future prospects of quantum chips and their applications. We welcome papers on all aspects of quantum chips, including on their design, fabrication, characterization, and applications. We invite original research, review articles, and communications that focus on the latest developments in quantum chip technology, as well as their potential applications in areas such as cryptography, machine learning, and drug discovery, among others.

Prof. Dr. Yu Zhou
Prof. Dr. Junfeng Wang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

design and fabrication of quantum chips
potential applications of quantum chips
quantum computing and quantum error correction
quantum sensing
on-chip integration
quantum optics devices

Published Papers (2 papers)

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Research

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12 pages, 1455 KiB

Open AccessArticle

Multipoint Lock-in Detection for Diamond Nitrogen-Vacancy Magnetometry Using DDS-Based Frequency-Shift Keying

by Qidi Hu, Luheng Cheng, Yushan Liu, Xinyi Zhu, Yu Tian and Nanyang Xu

Micromachines 2024, 15(1), 14; https://doi.org/10.3390/mi15010014 - 21 Dec 2023

Cited by 1 | Viewed by 1041

Abstract

In recent years, the nitrogen-vacancy (NV) center in diamonds has been demonstrated to be a high-performance multiphysics sensor, where a lock-in amplifier (LIA) is often adopted to monitor photoluminescence changes around the resonance. It is rather complex when multiple resonant points are utilized to realize a vector or temperature-magnetic joint sensing. In this article, we present a novel scheme to realize multipoint lock-in detection with only a single-channel device. This method is based on a direct digital synthesizer (DDS) and frequency-shift keying (FSK) technique, which is capable of freely hopping frequencies with a maximum of 1.4 GHz bandwidth and encoding an unlimited number of resonant points during the sensing process. We demonstrate this method in experiments and show it would be generally useful in quantum multi-frequency excitation applications, especially in the portable and highly mobile cases. Full article

(This article belongs to the Special Issue Future Prospects of Quantum Chips and Their Applications)

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Review

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19 pages, 2854 KiB

Open AccessReview

Optomechanical Microwave-to-Optical Photon Transducer Chips: Empowering the Quantum Internet Revolution

by Xinyao Xu, Yifei Zhang, Jindao Tang, Peiqin Chen, Liping Zeng, Ziwei Xia, Wenbo Xing, Qiang Zhou, You Wang, Haizhi Song, Guangcan Guo and Guangwei Deng

Micromachines 2024, 15(4), 485; https://doi.org/10.3390/mi15040485 - 31 Mar 2024

Viewed by 796

Abstract

The first quantum revolution has brought us the classical Internet and information technology. Today, as technology advances rapidly, the second quantum revolution quietly arrives, with a crucial moment for quantum technology to establish large-scale quantum networks. However, solid-state quantum bits (such as superconducting and semiconductor qubits) typically operate in the microwave frequency range, making it challenging to transmit signals over long distances. Therefore, there is an urgent need to develop quantum transducer chips capable of converting microwaves into optical photons in the communication band, since the thermal noise of optical photons at room temperature is negligible, rendering them an ideal information carrier for large-scale spatial communication. Such devices are important for connecting different physical platforms and efficiently transmitting quantum information. This paper focuses on the fast-developing field of optomechanical quantum transducers, which has flourished over the past decade, yielding numerous advanced achievements. We categorize transducers based on various mechanical resonators and discuss their principles of operation and their achievements. Based on existing research on optomechanical transducers, we compare the parameters of several mechanical resonators and analyze their advantages and limitations, as well as provide prospects for the future development of quantum transducers. Full article

(This article belongs to the Special Issue Future Prospects of Quantum Chips and Their Applications)

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