Article
Materials Science, Multidisciplinary
Robert E. Throckmorton, S. Das Sarma
Summary: The research shows that many-body localization effects can be observed in a finite chain of exchange-coupled spin qubits in semiconductors. The spin-spin correlation function is proposed as a new measured quantity in experiments with potential solid-state quantum computing platforms. The relationship between delocalized and localized phases and the retention of memory in spin-spin correlation functions is studied, with the counterintuitive finding of no clear tendency towards localization with increasing charge noise in small systems.
Article
Quantum Science & Technology
Jessie T. Zhang, Lewis R. B. Picard, William B. Cairncross, Kenneth Wang, Yichao Yu, Fang Fang, Kang-Kuen Ni
Summary: Researchers have extended the molecular assembly technique to an array of five molecules, enabling control and manipulation of multiple molecules and unlocking the ability to study molecular interactions. They have outlined the technical challenges and solutions inherent in scaling up this system, providing a platform to utilize the vast resources and long-range dipolar interactions of molecules.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Review
Physics, Multidisciplinary
Guido Burkard, Thaddeus D. Ladd, Andrew Pan, John M. Nichol, Jason R. Petta
Summary: The spin degree of freedom of an electron or a nucleus is a basic property that provides a natural two-level system for quantum information processing. Semiconductor spin qubits have made significant advancements in terms of quantum state preparation, coherent control, and measurement. These qubits have the potential for scalable solid-state quantum information processing, thanks to their small size, high density, long coherence times, and existing industrial infrastructure.
REVIEWS OF MODERN PHYSICS
(2023)
Article
Optics
Xiruo Yan, Sebastian Gitt, Becky Lin, Donald Witt, Mahssa Abdolahi, Abdelrahman Afifi, Adan Azem, Adam Darcie, Jingda Wu, Kashif Awan, Matthew Mitchell, Andreas Pfenning, Lukas Chrostowski, Jeff F. Young
Summary: Universal quantum computing has the potential to revolutionize the information-based society, but a hardware platform for fault-tolerant quantum computing remains elusive. One proposed platform involves using circuit-bound photons and solid-state spin qubits for measurement-based quantum computations, but practical implementation faces challenges. Silicon is identified as a leading candidate for hosting such a platform.
Article
Physics, Multidisciplinary
Wentian Zheng, Ke Bian, Xiakun Chen, Yang Shen, Shichen Zhang, Rainer Stohr, Andrej Denisenko, Jorg Wrachtrup, Sen Yang, Ying Jiang
Summary: An efficient method was developed to engineer the electrostatic environment of near-surface nitrogen vacancy center qubits, increasing their coherence and sensitivity.
Article
Quantum Science & Technology
T-W Hsu, W. Zhu, T. Thiele, M. O. Brown, S. B. Papp, A. Agrawal, C. A. Regal
Summary: In this study, we demonstrate the use of efficient dielectric metasurface lens for trapping and imaging single neutral atoms. We compare the performance of the metasurface lens with numerical computations and predict its potential for future applications in atom trapping and quantum information experiments.
Article
Physics, Multidisciplinary
S. Spence, R. Brooks, D. K. Ruttley, A. Guttridge, Simon L. Cornish
Summary: The authors report simultaneous Raman sideband cooling of a single Rb-87 atom and a single Cs-133 atom held in separate optical tweezers. They demonstrate cooling of single Rb atoms in an array of four tweezers and prepare the atoms in the relative motional ground state with high efficiency. This work is a crucial step towards the formation of single RbCs molecules confined in optical tweezer arrays.
NEW JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Takashi Kobayashi, Joseph Salfi, Cassandra Chua, Joost van der Heijden, Matthew G. House, Dimitrie Culcer, Wayne D. Hutchison, Brett C. Johnson, Jeff C. McCallum, Helge Riemann, Nikolay Abrosimov, Peter Becker, Hans-Joachim Pohl, Michelle Y. Simmons, Sven Rogge
Summary: Strong spin-orbit coupling systems allow for electrically controlled spin qubits, with electron-spin qubits having long coherence times suitable for quantum technologies. Ultra-long coherence times of 10 ms have been demonstrated for strain-engineered hole states bound to boron acceptors in bulk silicon 28, promising to greatly improve spin qubit scalability and functionality. These results open up new possibilities for developing artificial quantum systems and enhancing the functionality and scalability of spin-based quantum technologies.
Article
Multidisciplinary Sciences
Aaron J. Weinstein, Matthew D. Reed, Aaron M. Jones, Reed W. Andrews, David Barnes, Jacob Z. Blumoff, Larken E. Euliss, Kevin Eng, Bryan H. Fong, Sieu D. Ha, Daniel R. Hulbert, Clayton A. C. Jackson, Michael Jura, Tyler E. Keating, Joseph Kerckhoff, Andrey A. Kiselev, Justine Matten, Golam Sabbir, Aaron Smith, Jeffrey Wright, Matthew T. Rakher, Thaddeus D. Ladd, Matthew G. Borselli
Summary: This study demonstrates an alternative approach to quantum computation that uses energy-degenerate encoded qubit states controlled by nearest-neighbour contact interactions, bypassing microwave-associated correlated errors. The combination of enriched silicon, all-electrical partial swap operations, and configurable encoding offers a strong pathway towards scalable fault tolerance and computational advantage.
Article
Engineering, Electrical & Electronic
Xin Tong, Henan Liu, Guifang Li, Lin Zhang
Summary: The study introduces an integrated waveguide optical tweezer design that achieves focusing of upward radiation through etched trenches on a waveguide. Optimization of the antenna's structural parameters generates a quasi-Gaussian field distribution above the antenna. The gradient distribution of the electric field produces gradient force, enabling effective optical trapping of microscale particles.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Kenta Takeda, Akito Noiri, Takashi Nakajima, Takashi Kobayashi, Seigo Tarucha
Summary: In this article, the authors demonstrate a three-qubit phase-correcting code in silicon, successfully implementing quantum error correction (QEC) and showcasing the potential of a silicon-based platform for large-scale quantum computing.
Article
Nanoscience & Nanotechnology
Will Gilbert, Tuomo Tanttu, Wee Han Lim, MengKe Feng, Jonathan Y. Huang, Jesus D. Cifuentes, Santiago Serrano, Philip Y. Mai, Ross C. C. Leon, Christopher C. Escott, Kohei M. Itoh, Nikolay V. Abrosimov, Hans-Joachim Pohl, Michael L. W. Thewalt, Fay E. Hudson, Andrea Morello, Arne Laucht, Chih Hwan Yang, Andre Saraiva, Andrew S. Dzurak
Summary: This study demonstrates fast electrical control of electron spin in silicon quantum dots by exploiting the switchable interaction between spin and orbital motion of electrons without using a micromagnet. By controlling the energy quantization of electrons in nanostructures, the weak effects of the relativistic spin-orbit interaction in silicon are enhanced, leading to a significant increase in Rabi frequency. The achieved coherence time, gate performance, and gate fidelity show the potential for high-performance all-electrical control in scalable silicon quantum computing.
NATURE NANOTECHNOLOGY
(2023)
Editorial Material
Quantum Science & Technology
Charles Tahan
Summary: The author has been building Powerpoint-based quantum computers with electron spins in silicon for 20 years. The challenges in implementing real-life-based quantum dot quantum computers are discussed, with a focus on accelerating discovery by making and measuring more qubits. Separating qubit realization and testing circuitry from materials science and on-chip fabrication is proposed as a way to advance semiconductor quantum information devices and enable small quantum computers.
Article
Chemistry, Multidisciplinary
Jerome Tribollet, Dominique Muller, Stephane Roques, Jeremy Bartringer, Thomas Fix
Summary: A new method has been demonstrated to create shallow silicon vacancy (V2) spin qubits below the surface of SiC through low energy ion implantation. These shallow spin qubits are shown to be dipolar coupled to an electronic spin bath, with their coherence time increasing with cooling of the spin bath and further extended by dynamical decoupling. External spin sensing is also demonstrated through the shift of VSi magnetic resonance lines induced by a nearby ferrimagnetic YIG film's dipolar stray magnetic field.
Article
Chemistry, Multidisciplinary
Rui-Zi Hu, Rong-Long Ma, Ming Ni, Xin Zhang, Yuan Zhou, Ke Wang, Gang Luo, Gang Cao, Zhen-Zhen Kong, Gui-Lei Wang, Hai-Ou Li, Guo-Ping Guo
Summary: This paper introduces how to realize a single spin qubit from Si-MOS quantum dots, including the structure and basic properties of the quantum dots, as well as methods for spin-to-charge conversion and coherent manipulation of spin qubits.