Abstract
Universal quantum computing holds the promise to fundamentally change today’s information-based society, yet a hardware platform that will provide a clear path to fault-tolerant quantum computing remains elusive. One recently proposed platform involves the use of circuit-bound photons to build cluster states and perform one-way measurement-based quantum computations on arrays of long-coherence-time solid-state spin qubits. Herein, we discuss the challenges that are faced during any practical implementation of this architecture by itemizing the key physical building blocks and the constraints imposed on the spin qubits and the photonic circuit components by the requirements of fault-tolerant performance. These considerations point to silicon as a leading candidate to host such a platform, and a roadmap for developing a silicon photonic circuit-based platform for measurement-based, fault-tolerant universal quantum computing is offered.
Highlights
The technology for processing and transporting information continues to evolve at an astounding rate
In the era of automated information processing and transportation, light temporarily took a back seat to electrical transmission and distribution until optical fibers and compact, high-efficiency, bright electromagnetic wave sources and detectors were developed, to the point where most highspeed communication over macroscopic distances is based on propagating electromagnetic waves
Incorporating an additional cooling stage based on continuous adiabatic demagnetization refrigeration or He absorption fridges allows for stable operation at T < 1 K, which turns out to be the ideal operational temperature for integrated superconducting nanowire single-photon detectors (SNSPDs) based on Nb(Ti)N or a-WSi
Summary
The technology for processing and transporting information continues to evolve at an astounding rate. In the era of automated information processing and transportation, light temporarily took a back seat to electrical transmission and distribution until optical fibers and compact, high-efficiency, bright electromagnetic wave sources and detectors were developed, to the point where most highspeed communication over macroscopic distances is based on propagating electromagnetic waves. At least vaguely aware of the numerous high-profile, worldwide research and development activities aimed at revolutionizing and commercializing information processing and transportation technologies by basing their operating principles on the fundamental properties of quantum mechanics that distinguish it from classical physics. Scitation.org/journal/app might be the role of light in future quantum-based information technologies. The majority of this Perspective describes one of many approaches being considered to build a truly universal quantum computer. In a landscape that includes architectures entirely based on the quantum properties of electronic (matter-based) components and others that are entirely based on the quantum properties of light, our approach proposes to process quantum information using single photon and single electron spins in equal parts
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
