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Title: Surface code architecture for donors and dots in silicon with imprecise and nonuniform qubit couplings

Journal Article · · Physical Review B
 [1];  [1];  [2];  [3];  [2]
  1. University of St. Andrews (United Kingdom). SUPA, School of Physics and Astronomy
  2. Princeton Univ., NJ (United States). Deptartment of Electrical Engineering
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Ion Beam Technology Group

A scaled quantum computer with donor spins in silicon would benefit from a viable semiconductor framework and a strong inherent decoupling of the qubits from the noisy environment. Coupling neighboring spins via the natural exchange interaction according to current designs requires gate control structures with extremely small length scales. In this work, we present a silicon architecture where bismuth donors with long coherence times are coupled to electrons that can shuttle between adjacent quantum dots, thus relaxing the pitch requirements and allowing space between donors for classical control devices. An adiabatic SWAP operation within each donor/dot pair solves the scalability issues intrinsic to exchange-based two-qubit gates, as it does not rely on subnanometer precision in donor placement and is robust against noise in the control fields. In conclusion, we use this SWAP together with well established global microwave Rabi pulses and parallel electron shuttling to construct a surface code that needs minimal, feasible local control.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231; SC0002140
OSTI ID:
1379035
Alternate ID(s):
OSTI ID: 1235641
Journal Information:
Physical Review B, Vol. 93, Issue 3; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (24)

Silicon quantum processor with robust long-distance qubit couplings journal September 2017
Coherent coupling between a quantum dot and a donor in silicon journal October 2017
Silicon CMOS architecture for a spin-based quantum computer journal December 2017
Interfacing spin qubits in quantum dots and donors—hot, dense, and coherent journal September 2017
A silicon quantum-dot-coupled nuclear spin qubit journal December 2019
Towards visualisation of central-cell-effects in scanning tunnelling microscope images of subsurface dopant qubits in silicon journal January 2017
Annealing shallow Si/SiO 2 interface traps in electron-beam irradiated high-mobility metal-oxide-silicon transistors journal March 2017
Influence of uniaxial stress on phonon-assisted relaxation in bismuth-doped silicon journal January 2020
Network architecture for a topological quantum computer in silicon journal January 2019
Gate fidelity comparison in semiconducting spin qubit implementations affected by control noises journal November 2018
Semiconductor quantum computation journal December 2018
Exploring quantum chaos with a single nuclear spin journal October 2018
Logical Qubit in a Linear Array of Semiconductor Quantum Dots journal June 2018
Nondestructive imaging of atomically thin nanostructures buried in silicon journal June 2017
A Silicon Surface Code Architecture Resilient Against Leakage Errors journal December 2019
Single atom devices by ion implantation journal March 2015
Nondestructive imaging of atomically thin nanostructures buried in silicon text January 2017
Interfacing spin qubits in quantum dots and donors—hot, dense, and coherent text January 2017
Silicon quantum processor with robust long-distance qubit couplings text January 2015
Coherent coupling between a quantum dot and a donor in silicon text January 2015
Interfacing spin qubits in quantum dots and donors - hot, dense and coherent text January 2016
Towards visualisation of central-cell-effects in scanning-tunnelling-microscope images of subsurface dopant qubits in silicon text January 2017
Gate fidelity comparison in semiconducting spin qubit implementations affected by control noises text January 2018
A Silicon Surface Code Architecture Resilient Against Leakage Errors text January 2019


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