Dr Joris Keizer

Dr Joris Keizer

Senior Lecturer
Science
School of Physics

Joris Keizer is a senior research fellow at the School of Physics at the University of New South Wales, Sydney, Australia. Joris is widely respected as an expert in atomic scale quantum device fabrication using scanning tunneling microscopy (STM). He is currently developing atomically precise dopant placement and 3D fabrication techniques for error correction in universal quantum computers in the ARC Centre of Excellence for Quantum Computation and Communication (CQC2T) and Silicon Quantum Computing (SQC). His work to-date has focused on the fabrication of atomic-scale devices with the goal of realizing a scalable surface code architecture in silicon for quantum computing. Joris received his PhD in Applied Physics from the Eindhoven University of Technology University, the Netherlands, in 2012.

Phone
041/483-2180
Location
Newton Building, Level 2
  • Book Chapters | 2012
    Keizer JG; Koenraad PM, 2012, 'Atomic-scale analysis of self-assembled quantum dots by cross-sectionalscanning, tunneling microscopy, and atom probe tomography', in Quantum Dots: Optics, Electron Transport and Future Applications, pp. 41 - 60, http://dx.doi.org/10.1017/CBO9780511998331.004
  • Journal articles | 2024
    Hsueh Y-L; Keith D; Chung Y; Gorman SK; Kranz L; Monir S; Kembrey Z; Keizer JG; Rahman R; Simmons MY, 2024, 'Engineering Spin-Orbit Interactions in Silicon Qubits at the Atomic-Scale.', Adv Mater, pp. e2312736, http://dx.doi.org/10.1002/adma.202312736
    Journal articles | 2024
    Reiner J; Chung Y; Misha SH; Lehner C; Moehle C; Poulos D; Monir S; Charde KJ; Macha P; Kranz L; Thorvaldson I; Thorgrimsson B; Keith D; Hsueh YL; Rahman R; Gorman SK; Keizer JG; Simmons MY, 2024, 'High-fidelity initialization and control of electron and nuclear spins in a four-qubit register', Nature Nanotechnology, http://dx.doi.org/10.1038/s41565-023-01596-9
    Journal articles | 2023
    Donnelly MB; Munia MM; Keizer JG; Chung Y; Huq AMSE; Osika EN; Hsueh YL; Rahman R; Simmons MY, 2023, 'Multi-Scale Modeling of Tunneling in Nanoscale Atomically Precise Si:P Tunnel Junctions', Advanced Functional Materials, 33, http://dx.doi.org/10.1002/adfm.202214011
    Journal articles | 2023
    Jones MT; Monir MS; Krauth FN; Macha P; Hsueh YL; Worrall A; Keizer JG; Kranz L; Gorman SK; Chung Y; Rahman R; Simmons MY, 2023, 'Atomic Engineering of Molecular Qubits for High-Speed, High-Fidelity Single Qubit Gates', ACS Nano, 17, pp. 22601 - 22610, http://dx.doi.org/10.1021/acsnano.3c06668
    Journal articles | 2023
    Kranz L; Gorman SK; Thorgrimsson B; Monir S; He Y; Keith D; Charde K; Keizer JG; Rahman R; Simmons MY, 2023, 'The Use of Exchange Coupled Atom Qubits as Atomic-Scale Magnetic Field Sensors', Advanced Materials, 35, http://dx.doi.org/10.1002/adma.202201625
    Journal articles | 2023
    Kranz L; Gorman SK; Thorgrimsson B; Monir S; He Y; Keith D; Charde K; Keizer JG; Rahman R; Simmons MY, 2023, 'The Use of Exchange Coupled Atom Qubits as Atomic‐Scale Magnetic Field Sensors (Adv. Mater. 6/2023)', Advanced Materials, 35, http://dx.doi.org/10.1002/adma.202370039
    Journal articles | 2023
    Kranz L; Osika EN; Monir S; Hsueh YL; Fricke L; Hile SJ; Chung Y; Keizer JG; Rahman R; Simmons MY, 2023, 'Exploiting Atomic Control to Show When Atoms Become Molecules', Advanced Functional Materials, http://dx.doi.org/10.1002/adfm.202307285
    Journal articles | 2023
    Kranz L; Roche S; Gorman SK; Keizer JG; Simmons MY, 2023, 'High-Fidelity CNOT Gate for Donor Electron Spin Qubits in Silicon', Physical Review Applied, 19, http://dx.doi.org/10.1103/PhysRevApplied.19.024068
    Journal articles | 2022
    Keith D; Gorman SK; Kranz L; He Y; Keizer JG; Broome MA; Simmons MY, 2022, 'Erratum: Benchmarking high fidelity single-shot readout of semiconductor qubits (New J. Phys. (2019) 21 (063011) DOI: 10.1088/1367-2630/ab242c/meta)', New Journal of Physics, 24, http://dx.doi.org/10.1088/1367-2630/ac7479
    Journal articles | 2022
    Kiczynski M; Gorman SK; Geng H; Donnelly MB; Chung Y; He Y; Keizer JG; Simmons MY, 2022, 'Engineering topological states in atom-based semiconductor quantum dots', Nature, 606, pp. 694 - 699, http://dx.doi.org/10.1038/s41586-022-04706-0
    Journal articles | 2021
    Donnelly MB; Keizer JG; Chung Y; Simmons MY, 2021, 'Monolithic Three-Dimensional Tuning of an Atomically Defined Silicon Tunnel Junction', Nano Letters, 21, pp. 10092 - 10098, http://dx.doi.org/10.1021/acs.nanolett.1c03879
    Journal articles | 2021
    Fricke L; Hile SJ; Kranz L; Chung Y; He Y; Pakkiam P; House MG; Keizer JG; Simmons MY, 2021, 'Coherent control of a donor-molecule electron spin qubit in silicon', Nature Communications, 12, http://dx.doi.org/10.1038/s41467-021-23662-3
    Journal articles | 2020
    Kranz L; Gorman SK; Thorgrimsson B; He Y; Keith D; Keizer JG; Simmons MY, 2020, 'Exploiting a Single-Crystal Environment to Minimize the Charge Noise on Qubits in Silicon', Advanced Materials, 32, http://dx.doi.org/10.1002/adma.202003361
    Journal articles | 2020
    Kranz L; Gorman SK; Thorgrimsson B; He Y; Keith D; Keizer JG; Simmons MY, 2020, 'Quantum Computing: Exploiting a Single‐Crystal Environment to Minimize the Charge Noise on Qubits in Silicon (Adv. Mater. 40/2020)', Advanced Materials, 32, http://dx.doi.org/10.1002/adma.202070298
    Journal articles | 2019
    He Y; Gorman SK; Keith D; Kranz L; Keizer JG; Simmons MY, 2019, 'A two-qubit gate between phosphorus donor electrons in silicon', Nature, 571, pp. 371 - 375, http://dx.doi.org/10.1038/s41586-019-1381-2
    Journal articles | 2019
    2019, 'Benchmarking high fidelity single-shot readout of semiconductor qubits', , http://dx.doi.org/10.1088/1367-2630/ab242c
    Journal articles | 2019
    2019, 'Spin read-out in atomic qubits in an all-epitaxial three-dimensional transistor', , http://dx.doi.org/10.1038/s41565-018-0338-1
    Journal articles | 2018
    Broome MA; Gorman SK; House MG; Hile SJ; Keizer JG; Keith D; Hill CD; Watson TF; Baker WJ; Hollenberg LCL; Simmons MY, 2018, 'Two-electron spin correlations in precision placed donors in silicon', Nature Communications, 9, pp. 980, http://dx.doi.org/10.1038/s41467-018-02982-x
    Journal articles | 2018
    Hile SJ; Fricke L; House MG; Peretz E; Chen CY; Wang Y; Broome M; Gorman SK; Keizer JG; Rahman R; Simmons MY, 2018, 'Addressable electron spin resonance using donors and donor molecules in silicon', Science Advances, 4, pp. eaaq1459, http://dx.doi.org/10.1126/sciadv.aaq1459
    Journal articles | 2018
    Gorman SK; Broome MA; House MG; Hile SJ; Keizer JG; Keith D; Watson TF; Baker WJ; Simmons MY, 2018, 'Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot', , http://dx.doi.org/10.1063/1.5021500
    Journal articles | 2017
    Broome MA; Watson TF; Keith D; Gorman SK; House MG; Keizer JG; Hile SJ; Baker W; Simmons MY, 2017, 'High-Fidelity Single-Shot Singlet-Triplet Readout of Precision-Placed Donors in Silicon', Physical Review Letters, 119, http://dx.doi.org/10.1103/PhysRevLett.119.046802
    Journal articles | 2017
    Gorman SK; He Y; House MG; Keizer JG; Keith D; Fricke L; Hile SJ; Broome MA; Simmons MY, 2017, 'Tunneling Statistics for Analysis of Spin-Readout Fidelity', , http://dx.doi.org/10.1103/physrevapplied.8.034019
    Journal articles | 2016
    Broome MA; Gorman SK; Keizer JG; Watson TF; Hile SJ; Baker WJ; Simmons MY, 2016, 'Mapping the chemical potential landscape of a triple quantum dot', , http://dx.doi.org/10.1103/physrevb.94.054314
    Journal articles | 2016
    Gorman SK; Broome MA; Keizer JG; Watson TF; Hile SJ; Baker WJ; Simmons MY, 2016, 'Extracting inter-dot tunnel couplings between few donor quantum dots in silicon', , http://dx.doi.org/10.1088/1367-2630/18/5/053041
    Journal articles | 2015
    Bietti S; Bocquel J; Adorno S; Mano T; Keizer JG; Koenraad PM; Sanguinetti S, 2015, 'Precise shape engineering of epitaxial quantum dots by growth kinetics', Physical Review B - Condensed Matter and Materials Physics, 92, http://dx.doi.org/10.1103/PhysRevB.92.075425
    Journal articles | 2015
    Keizer JG; Koelling S; Koenraad PM; Simmons MY, 2015, 'Suppressing Segregation in Highly Phosphorus Doped Silicon Monolayers', ACS Nano, 9, pp. 12537 - 12541, http://dx.doi.org/10.1021/acsnano.5b06299
    Journal articles | 2015
    Keizer JG; McKibbin SR; Simmons MY, 2015, 'The Impact of Dopant Segregation on the Maximum Carrier Density in Si:P Multilayers', , http://dx.doi.org/10.1021/acsnano.5b01638
    Journal articles | 2014
    Grossi DF; Smereka P; Keizer JG; Ulloa JM; Koenraad PM, 2014, 'Erratum: "Height control of self-assembled quantum dots by strain engineering during capping" (Applied Physics Letters (2014) 105, (143104))', Applied Physics Letters, 105, http://dx.doi.org/10.1063/1.4901731
    Journal articles | 2014
    Grossi DF; Smereka P; Keizer JG; Ulloa JM; Koenraad PM, 2014, 'Height control of self-assembled quantum dots by strain engineering during capping', Applied Physics Letters, 105, http://dx.doi.org/10.1063/1.4897345
    Journal articles | 2014
    House MG; Peretz E; Keizer JG; Hile SJ; Simmons MY, 2014, 'Single-charge detection by an atomic precision tunnel junction', Applied Physics Letters, 104, http://dx.doi.org/10.1063/1.4869032
    Journal articles | 2014
    Keizer JG; Ulloa JM; Utrilla AD; Koenraad PM, 2014, 'InAs quantum dot morphology after capping with In, N, Sb alloyed thin films', Applied Physics Letters, 104, http://dx.doi.org/10.1063/1.4864159
    Journal articles | 2014
    McKibbin SR; Polley CM; Scappucci G; Keizer JG; Simmons MY, 2014, 'Low resistivity, super-saturation phosphorus-in-silicon monolayer doping', , http://dx.doi.org/10.1063/1.4869111
    Journal articles | 2013
    Urbańczyk A; Keizer JG; Koenraad PM; Nötzel R, 2013, 'Long wavelength (>1.55 μm) room temperature emission and anomalous structural properties of InAs/GaAs quantum dots obtained by conversion of in nanocrystals', Applied Physics Letters, 102, http://dx.doi.org/10.1063/1.4792700
    Journal articles | 2012
    Jovanov V; Eissfeller T; Kapfinger S; Clark EC; Klotz F; Bichler M; Keizer JG; Koenraad PM; Brandt MS; Abstreiter G; Finley JJ, 2012, 'Highly nonlinear excitonic Zeeman spin splitting in composition-engineered artificial atoms', Physical Review B - Condensed Matter and Materials Physics, 85, http://dx.doi.org/10.1103/PhysRevB.85.165433
    Journal articles | 2012
    Keizer JG; Henriques AB; Maia ADB; Quivy AA; Koenraad PM, 2012, 'Atomically resolved study of the morphology change of InAs/GaAs quantum dot layers induced by rapid thermal annealing', Applied Physics Letters, 101, http://dx.doi.org/10.1063/1.4770371
    Journal articles | 2012
    Keizer JG; Koenraad PM; Smereka P; Ulloa JM; Guzman A; Hierro A, 2012, 'Kinetic Monte Carlo simulations and cross-sectional scanning tunneling microscopy as tools to investigate the heteroepitaxial capping of self-assembled quantum dots', Physical Review B - Condensed Matter and Materials Physics, 85, http://dx.doi.org/10.1103/PhysRevB.85.155326
    Journal articles | 2011
    Giddings AD; Keizer JG; Hara M; Hamhuis GJ; Yuasa H; Fukuzawa H; Koenraad PM, 2011, 'Composition profiling of InAs quantum dots and wetting layers by atom probe tomography and cross-sectional scanning tunneling microscopy', Physical Review B - Condensed Matter and Materials Physics, 83, http://dx.doi.org/10.1103/PhysRevB.83.205308
    Journal articles | 2011
    Jo M; Keizer JG; Mano T; Koenraad PM; Sakoda K, 2011, 'Self-assembly of GaAs quantum wires grown on (311)A substrates by droplet epitaxy', Applied Physics Express, 4, http://dx.doi.org/10.1143/APEX.4.055501
    Journal articles | 2011
    Jovanov V; Eissfeller T; Kapfinger S; Clark EC; Klotz F; Bichler M; Keizer JG; Koenraad PM; Abstreiter G; Finley JJ, 2011, 'Observation and explanation of strong electrically tunable exciton g factors in composition engineered In(Ga)As quantum dots', Physical Review B - Condensed Matter and Materials Physics, 83, http://dx.doi.org/10.1103/PhysRevB.83.161303
    Journal articles | 2011
    Keizer JG; Bozkurt M; Bocquel J; Mano T; Noda T; Sakoda K; Clark EC; Bichler M; Abstreiter G; Finley JJ; Lu W; Rohel T; Folliot H; Bertru N; Koenraad PM, 2011, 'Shape control of quantum dots studied by cross-sectional scanning tunneling microscopy', Journal of Applied Physics, 109, http://dx.doi.org/10.1063/1.3577960
    Journal articles | 2011
    Keizer JG; Jo M; Mano T; Noda T; Sakoda K; Koenraad PM, 2011, 'Erratum: Structural atomic-scale analysis of GaAs/AlGaAs quantum wires and quantum dots grown by droplet epitaxy on a (311) A substrate (Applied Physics Letters (2011) 98 (193112))', Applied Physics Letters, 99, http://dx.doi.org/10.1063/1.3633014
    Journal articles | 2011
    Keizer JG; Jo M; Mano T; Noda T; Sakoda K; Koenraad PM, 2011, 'Structural atomic-scale analysis of GaAs/AlGaAs quantum wires and quantum dots grown by droplet epitaxy on a (311)A substrate', Applied Physics Letters, 98, http://dx.doi.org/10.1063/1.3589965
    Journal articles | 2011
    Lu W; Bozkurt M; Keizer JG; Rohel T; Folliot H; Bertru N; Koenraad PM, 2011, 'Shape and size control of InAs/InP (113)B quantum dots by Sb deposition during the capping procedure', Nanotechnology, 22, http://dx.doi.org/10.1088/0957-4484/22/5/055703
    Journal articles | 2010
    Keizer JG; Bocquel J; Koenraad PM; Mano T; Noda T; Sakoda K, 2010, 'Atomic scale analysis of self assembled GaAs/AlGaAs quantum dots grown by droplet epitaxy', Applied Physics Letters, 96, http://dx.doi.org/10.1063/1.3303979
    Journal articles | 2010
    Keizer JG; Clark EC; Bichler M; Abstreiter G; Finley JJ; Koenraad PM, 2010, 'An atomically resolved study of InGaAs quantum dot layers grown with an indium flush step', Nanotechnology, 21, http://dx.doi.org/10.1088/0957-4484/21/21/215705
    Journal articles | 2010
    Kleemans NAJM; Van Bree J; Govorov AO; Keizer JG; Hamhuis GJ; Nötzel R; Silov AY; Koenraad PM, 2010, 'Many-body exciton states in self-assembled quantum dots coupled to a Fermi sea', Nature Physics, 6, pp. 534 - 538, http://dx.doi.org/10.1038/nphys1673
    Journal articles | 2009
    Keizer JG; Garleff JK; Koenraad PM, 2009, 'Simple and efficient scanning tunneling luminescence detection at low-temperature', Review of Scientific Instruments, 80, http://dx.doi.org/10.1063/1.3274675
    Journal articles | 2008
    Paffen ML; Keizer JG; de Winter GV; Arends AJ; Hendrikx AJ, 2008, 'A comparison of the physical properties of four new generation flexible ureteroscopes: (De)flection, flow properties, torsion stiffness, and optical characteristics: Editorial comment', International Braz J Urol, 34, pp. 776
    Journal articles | 2008
    Paffen MLJE; Keizer JG; De Winter GV; Arends AJ; Hendrikx AJM, 2008, 'A comparison of the physical properties of four new generation flexible ureteroscopes: (de)flection, flow properties, torsion stiffness, and optical characteristics', Journal of Endourology, 22, pp. 2227 - 2234, http://dx.doi.org/10.1089/end.2008.0371
    Journal articles | 2006
    Broks BHP; Keizer JG; Zijlmans RAB; Van Der Mullen JJAM, 2006, 'Modelling of a pinched cascaded arc light source using argon', Plasma Sources Science and Technology, 15, pp. 865 - 872, http://dx.doi.org/10.1088/0963-0252/15/4/033
  • Preprints | 2022
    Donnelly MB; Keizer JG; Chung Y; Simmons MY, 2022, 3-Dimensional Tuning of an Atomically Defined Silicon Tunnel Junction, , http://dx.doi.org/10.48550/arxiv.2211.02180
    Patents | 2022
    Simmons M; Keizer J, 2022, A method for selective incorporation of dopant atoms in a semiconductive surface, Patent No. United States - 11227768
    Patents | 2019
    Simmons M; Keizer J; Koch M, 2019, A method of fabricating a three dimensional electronic structure, Patent No. United States patent no. 10373914; Australia patent no. 2017203949, http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10373914.PN.&OS=PN/10373914&RS=PN/10373914
    Preprints | 2018
    Broome MA; Gorman SK; House MG; Hile SJ; Keizer JG; Keith D; Hill CD; Watson TF; Baker WJ; Hollenberg LCL; Simmons MY, 2018, Two-Electron Spin Correlations in Precision Placed Donors in Silicon, , http://dx.doi.org/10.48550/arxiv.1807.10295
    Preprints | 2018
    Broome MA; Watson TF; Keith D; Gorman SK; House MG; Keizer JG; Hile SJ; Baker W; Simmons MY, 2018, High Fidelity Single-Shot Singlet-Triplet Readout of Precision Placed Donors in Silicon, , http://dx.doi.org/10.48550/arxiv.1807.10285
    Preprints | 2018
    Gorman SK; Broome MA; House MG; Hile SJ; Keizer JG; Keith D; Watson TF; Baker WJ; Simmons MY, 2018, Singlet-triplet minus mixing and relaxation lifetimes in a double donor dot, , http://dx.doi.org/10.48550/arxiv.1807.10289
    Preprints | 2018
    Hile SJ; Fricke L; House MG; Peretz E; Chen CY; Wang Y; Broome M; Gorman SK; Keizer JG; Rahman R; Simmons MY, 2018, Addressable electron spin resonance using donors and donor molecules in silicon, , http://dx.doi.org/10.48550/arxiv.1807.10290
    Preprints | 2018
    Keith D; Gorman SK; Kranz L; He Y; Keizer JG; Broome MA; Simmons MY, 2018, Benchmarking high fidelity single-shot readout of semiconductor qubits, , http://dx.doi.org/10.48550/arxiv.1811.03630
    Preprints | 2017
    Gorman SK; He Y; House MG; Keizer JG; Keith D; Fricke L; Hile SJ; Broome MA; Simmons MY, 2017, Tunneling statistics for analysis of spin-readout fidelity, , http://dx.doi.org/10.48550/arxiv.1710.02243
    Preprints | 2016
    Broome MA; Gorman SK; Keizer JG; Watson TF; Hile SJ; Baker WJ; Simmons MY, 2016, Mapping the Chemical Potential Landscape of a Triple Quantum Dot, , http://dx.doi.org/10.48550/arxiv.1609.03381
    Preprints | 2016
    Gorman SK; Broome MA; Keizer JG; Watson TF; Hile SJ; Baker WJ; Simmons MY, 2016, Extracting inter-dot tunnel couplings between few donor quantum dots in silicon, , http://dx.doi.org/10.48550/arxiv.1606.00851
    Preprints | 2014
    House MG; Peretz E; Keizer JG; Hile SJ; Simmons MY, 2014, Single-charge detection by an atomic precision tunnel junction, , http://dx.doi.org/10.48550/arxiv.1403.5320
    Preprints | 2011
    Jovanov V; Eissfeller T; Kapfinger S; Clark EC; Klotz F; Bichler M; Keizer JG; Koenraad PM; Brandt MS; Abstreiter G; Finley JJ, 2011, Highly Non-linear Excitonic Zeeman Spin-Splitting in Composition-Engineered Artificial Atoms, , http://dx.doi.org/10.48550/arxiv.1112.2585
    Preprints | 2010
    Giddings AD; Keizer JG; Hara M; Hamhuis GJ; Yuasa H; Fukuzawa H; Koenraad PM, 2010, Composition profiling InAs quantum dots and wetting layers by atom probe tomography and cross-sectional scanning tunnelling microscopy, , http://dx.doi.org/10.48550/arxiv.1010.5888
    Conference Papers | 2010
    Keizer JG; Bozkurt M; Bocquel J; Koenraad PM; Mano T; Noda T; Sakoda K; Clark EC; Bichler M; Abstreiter G; Finley JJ; Lu W; Rohel T; Folliot H; Bertru N, 2010, 'Shape Control of QDs Studied by Cross-sectional Scanning Tunneling Microscopy', in JOURNAL OF THE KOREAN PHYSICAL SOCIETY, KOREAN PHYSICAL SOC, SOUTH KOREA, Seoul, pp. 1244 - 1250, presented at 30th International Conference on the Physics of Semiconductors (ICPS-30), SOUTH KOREA, Seoul, 25 July 2010 - 30 July 2010, http://dx.doi.org/10.3938/jkps.58.1244
    Preprints | 2010
    Keizer JG; Bozkurt M; Bocquel J; Koenraad PM; Mano T; Noda T; Sakoda K; Clark EC; Bichler M; Abstreiter G; Finley JJ; Lu W; Rohel T; Folliot H; Bertru N, 2010, Shape control of QDs studied by cross-sectional scanning tunneling microscopy, , http://dx.doi.org/10.48550/arxiv.1011.3316