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Kostyantyn Kechedzhi
Researcher at Google
Publications - 67
Citations - 12246
Kostyantyn Kechedzhi is an academic researcher from Google. The author has contributed to research in topics: Qubit & Quantum computer. The author has an hindex of 23, co-authored 54 publications receiving 7985 citations. Previous affiliations of Kostyantyn Kechedzhi include University of Maryland, College Park & Ames Research Center.
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Journal ArticleDOI
Supplementary information for "Quantum supremacy using a programmable superconducting processor"
Frank Arute,Kunal Arya,Ryan Babbush,Dave Bacon,Joseph C. Bardin,Rami Barends,Rupak Biswas,Sergio Boixo,Fernando G. S. L. Brandão,David A. Buell,B. Burkett,Yu Chen,Zijun Chen,Ben Chiaro,Roberto Collins,William Courtney,Andrew Dunsworth,Edward Farhi,Brooks Foxen,Austin G. Fowler,Craig Gidney,Marissa Giustina,R. Graff,Keith Guerin,Steve Habegger,Matthew P. Harrigan,Michael J. Hartmann,Alan Ho,Markus R. Hoffmann,Trent Huang,Travis S. Humble,Sergei V. Isakov,Evan Jeffrey,Zhang Jiang,Dvir Kafri,Kostyantyn Kechedzhi,Julian Kelly,Paul V. Klimov,Sergey Knysh,Alexander N. Korotkov,Fedor Kostritsa,David Landhuis,Mike Lindmark,Erik Lucero,Dmitry I. Lyakh,Salvatore Mandrà,Jarrod R. McClean,Matt McEwen,Anthony Megrant,Xiao Mi,Kristel Michielsen,Masoud Mohseni,Josh Mutus,Ofer Naaman,Matthew Neeley,Charles Neill,Murphy Yuezhen Niu,Eric Ostby,Andre Petukhov,John Platt,Chris Quintana,Eleanor Rieffel,Pedram Roushan,Nicholas C. Rubin,Daniel Sank,Kevin J. Satzinger,Vadim Smelyanskiy,Kevin Sung,Matthew D. Trevithick,Amit Vainsencher,Benjamin Villalonga,Theodore White,Z. Jamie Yao,Ping Yeh,Adam Zalcman,Hartmut Neven,John M. Martinis +76 more
TL;DR: In this paper, an updated version of supplementary information to accompany "Quantum supremacy using a programmable superconducting processor", an article published in the October 24, 2019 issue of Nature, is presented.
Journal ArticleDOI
Quantum supremacy using a programmable superconducting processor
Frank Arute,Kunal Arya,Ryan Babbush,Dave Bacon,Joseph C. Bardin,Joseph C. Bardin,Rami Barends,Rupak Biswas,Sergio Boixo,Fernando G. S. L. Brandão,Fernando G. S. L. Brandão,David A. Buell,B. Burkett,Yu Chen,Zijun Chen,Ben Chiaro,Roberto Collins,William Courtney,Andrew Dunsworth,Edward Farhi,Brooks Foxen,Brooks Foxen,Austin G. Fowler,Craig Gidney,Marissa Giustina,R. Graff,Keith Guerin,Steve Habegger,Matthew P. Harrigan,Michael J. Hartmann,Michael J. Hartmann,Alan Ho,Markus R. Hoffmann,Trent Huang,Travis S. Humble,Sergei V. Isakov,Evan Jeffrey,Zhang Jiang,Dvir Kafri,Kostyantyn Kechedzhi,Julian Kelly,Paul V. Klimov,Sergey Knysh,Alexander N. Korotkov,Alexander N. Korotkov,Fedor Kostritsa,David Landhuis,Mike Lindmark,E. Lucero,Dmitry I. Lyakh,Salvatore Mandrà,Jarrod R. McClean,Matt McEwen,Anthony Megrant,Xiao Mi,Kristel Michielsen,Kristel Michielsen,Masoud Mohseni,Josh Mutus,Ofer Naaman,Matthew Neeley,Charles Neill,Murphy Yuezhen Niu,Eric Ostby,Andre Petukhov,John Platt,Chris Quintana,Eleanor Rieffel,Pedram Roushan,Nicholas C. Rubin,Daniel Sank,Kevin J. Satzinger,Vadim Smelyanskiy,Kevin J. Sung,Kevin J. Sung,Matthew D. Trevithick,Amit Vainsencher,Benjamin Villalonga,Benjamin Villalonga,Theodore White,Z. Jamie Yao,Ping Yeh,Adam Zalcman,Hartmut Neven,John M. Martinis,John M. Martinis +85 more
TL;DR: Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times, which would take a state-of-the-art supercomputer around ten thousand years to compute.
Journal ArticleDOI
Weak-localization magnetoresistance and valley symmetry in graphene.
Edward McCann,Kostyantyn Kechedzhi,Vladimir I. Fal'ko,Hidekatsu Suzuura,Tsuneya Ando,Boris L. Altshuler +5 more
TL;DR: This work evaluates the dependence of the magnetoresistance of graphene on relaxation rates associated with various possible ways of breaking a "hidden" valley symmetry of the system by evaluating the dependent rates of trigonal warping and intervalley scattering.
Journal ArticleDOI
Hartree-Fock on a superconducting qubit quantum computer
Frank Arute,Kunal Arya,Ryan Babbush,Dave Bacon,Joseph C. Bardin,Rami Barends,Sergio Boixo,Michael Broughton,Bob B. Buckley,David A. Buell,B. Burkett,Nicholas Bushnell,Yu Chen,Zijun Chen,Benjamin Chiaro,Roberto Collins,William Courtney,Sean Demura,Andrew Dunsworth,Edward Farhi,Austin G. Fowler,Brooks Foxen,Craig Gidney,Marissa Giustina,R. Graff,Steve Habegger,Matthew P. Harrigan,Alan Ho,Sabrina Hong,Trent Huang,William J. Huggins,Lev Ioffe,Sergei V. Isakov,Evan Jeffrey,Zhang Jiang,Cody Jones,Dvir Kafri,Kostyantyn Kechedzhi,Julian Kelly,Seon Jeong Kim,Paul V. Klimov,Alexander N. Korotkov,Fedor Kostritsa,David Landhuis,Pavel Laptev,Mike Lindmark,Erik Lucero,Orion Martin,John M. Martinis,Jarrod R. McClean,Matt McEwen,Anthony Megrant,Xiao Mi,Masoud Mohseni,Wojciech Mruczkiewicz,Josh Mutus,Ofer Naaman,Matthew Neeley,Charles Neill,Hartmut Neven,Murphy Yuezhen Niu,Thomas E. O'Brien,Eric Ostby,Andre Petukhov,Harald Putterman,Chris Quintana,Pedram Roushan,Nicholas C. Rubin,Daniel Sank,Kevin J. Satzinger,Vadim Smelyanskiy,Doug Strain,Kevin Sung,Marco Szalay,Tyler Y. Takeshita,Amit Vainsencher,Theodore White,Nathan Wiebe,Z. Jamie Yao,Ping Yeh,Adam Zalcman +80 more
TL;DR: Several quantum simulations of chemistry with up to one dozen qubits are performed, including modeling the isomerization mechanism of diazene, and error-mitigation strategies based on N-representability that dramatically improve the effective fidelity of the experiments are demonstrated.
Journal ArticleDOI
A blueprint for demonstrating quantum supremacy with superconducting qubits.
Charles Neill,Pedram Roushan,Kostyantyn Kechedzhi,Kostyantyn Kechedzhi,Sergio Boixo,Sergei V. Isakov,Vadim Smelyanskiy,Anthony Megrant,Benjamin Chiaro,Andrew Dunsworth,Kunal Arya,Rami Barends,B. Burkett,Yu Chen,Zijun Chen,Austin G. Fowler,Brooks Foxen,Marissa Giustina,R. Graff,Evan Jeffrey,Trent Huang,Julian Kelly,Paul V. Klimov,E. Lucero,Josh Mutus,Matthew Neeley,Chris Quintana,Daniel Sank,Amit Vainsencher,James Wenner,Ted White,Hartmut Neven,John M. Martinis,John M. Martinis +33 more
TL;DR: Nine superconducting qubits are used to demonstrate a promising path toward quantum supremacy and the scaling of errors and output with the number of qubits is explored in a five- to nine-qubit device.