Zobrazeno 1 - 10
of 33
pro vyhledávání: '"William J. Huggins"'
Autor:
Ryan Babbush, William J. Huggins, Dominic W. Berry, Shu Fay Ung, Andrew Zhao, David R. Reichman, Hartmut Neven, Andrew D. Baczewski, Joonho Lee
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-9 (2023)
Abstract Quantum algorithms for simulating electronic ground states are slower than popular classical mean-field algorithms such as Hartree–Fock and density functional theory but offer higher accuracy. Accordingly, quantum computers have been predo
Externí odkaz:
https://doaj.org/article/52f5615a26b1420493485a106f8d0e49
Autor:
William J. Huggins, Jarrod R. McClean
Publikováno v:
Quantum, Vol 8, p 1264 (2024)
Real-world applications of computing can be extremely time-sensitive. It would be valuable if we could accelerate such tasks by performing some of the work ahead of time. Motivated by this, we propose a cost model for quantum algorithms that allows q
Externí odkaz:
https://doaj.org/article/a148543a19d54654af83c09dc538e3b3
Autor:
Unpil Baek, Diptarka Hait, James Shee, Oskar Leimkuhler, William J. Huggins, Torin F. Stetina, Martin Head-Gordon, K. Birgitta Whaley
Publikováno v:
PRX Quantum, Vol 4, Iss 3, p 030307 (2023)
A balanced description of both static and dynamic correlations in electronic systems with nearly degenerate low-lying states presents a challenge for multiconfigurational methods on classical computers. We present here a quantum algorithm utilizing t
Externí odkaz:
https://doaj.org/article/018122c7421b40859211fb7338226677
Autor:
William J. Huggins, Jarrod R. McClean, Nicholas C. Rubin, Zhang Jiang, Nathan Wiebe, K. Birgitta Whaley, Ryan Babbush
Publikováno v:
npj Quantum Information, Vol 7, Iss 1, Pp 1-9 (2021)
Abstract Variational algorithms are a promising paradigm for utilizing near-term quantum devices for modeling electronic states of molecular systems. However, previous bounds on the measurement time required have suggested that the application of the
Externí odkaz:
https://doaj.org/article/53bda328a4dc416fa079f947a881d8b8
Autor:
Thomas E. O'Brien, Michael Streif, Nicholas C. Rubin, Raffaele Santagati, Yuan Su, William J. Huggins, Joshua J. Goings, Nikolaj Moll, Elica Kyoseva, Matthias Degroote, Christofer S. Tautermann, Joonho Lee, Dominic W. Berry, Nathan Wiebe, Ryan Babbush
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043210 (2022)
While most work on the quantum simulation of chemistry has focused on computing energy surfaces, a similarly important application requiring subtly different algorithms is the computation of energy derivatives. Almost all molecular properties can be
Externí odkaz:
https://doaj.org/article/5cede1d0c45840d6b4389cabde88e8f9
Autor:
William J. Huggins, Sam McArdle, Thomas E. O’Brien, Joonho Lee, Nicholas C. Rubin, Sergio Boixo, K. Birgitta Whaley, Ryan Babbush, Jarrod R. McClean
Publikováno v:
Physical Review X, Vol 11, Iss 4, p 041036 (2021)
Contemporary quantum computers have relatively high levels of noise, making it difficult to use them to perform useful calculations, even with a large number of qubits. Quantum error correction is expected to eventually enable fault-tolerant quantum
Externí odkaz:
https://doaj.org/article/47f0aaf515cc48a5a32bfac53fdebaaf
Autor:
Joonho Lee, Dominic W. Berry, Craig Gidney, William J. Huggins, Jarrod R. McClean, Nathan Wiebe, Ryan Babbush
Publikováno v:
PRX Quantum, Vol 2, Iss 3, p 030305 (2021)
We describe quantum circuits with only O[over ~](N) Toffoli complexity that block encode the spectra of quantum chemistry Hamiltonians in a basis of N arbitrary (e.g., molecular) orbitals. With O(λ/ϵ) repetitions of these circuits one can use phase
Externí odkaz:
https://doaj.org/article/8e704eb504af455dbfe0df347b273c2b
Autor:
Thomas E. O’Brien, Stefano Polla, Nicholas C. Rubin, William J. Huggins, Sam McArdle, Sergio Boixo, Jarrod R. McClean, Ryan Babbush
Publikováno v:
PRX Quantum, Vol 2, Iss 2, p 020317 (2021)
The accumulation of noise in quantum computers is the dominant issue stymieing the push of quantum algorithms beyond their classical counterparts. We do not expect to be able to afford the overhead required for quantum error correction in the next de
Externí odkaz:
https://doaj.org/article/3f6c18736bfe4d4c8322a24f4c8983a7
Autor:
Julian Kelly, Alexander Bilmes, Vedika Khemani, Seon Kim, Alexei Kitaev, Murphy Yuezhen Niu, J. Hilton, Orion Martin, Craig Gidney, Bob B. Buckley, Thomas E. O'Brien, Jarrod R. McClean, Alexander N. Korotkov, Pavel Laptev, Tanuj Khattar, Sabrina Hong, Daniel Eppens, Alan Ho, Aditya Locharla, Ofer Naaman, Ping Yeh, Juan Atalaya, Sean D. Harrington, Frank Arute, Roberto Collins, Joao Marcos Vensi Basso, Doug Strain, Matthew P. Harrigan, Zhang Jiang, Joonho Lee, Ami Greene, Alan R. Derk, Roderich Moessner, Bálint Pató, William J. Huggins, Trevor McCourt, Ashley Huff, Joseph C. Bardin, Andre Petukhov, Fedor Kostritsa, Michael Newman, Cody Jones, Sean Demura, Shivaji Lal Sondhi, B. Burkett, Sergio Boixo, Jonathan H. Gross, David A. Buell, Kevin J. Satzinger, Michael Broughton, Daniel Sank, Masoud Mohseni, Lev Ioffe, Yuan Su, Shirin Montazeri, Xiao Mi, Eric Ostby, Marissa Giustina, David Landhuis, Z. Jamie Yao, Kenny Lee, Kunal Arya, Pedram Roushan, Hartmut Neven, Sergei V. Isakov, Andrew Dunsworth, Zijun Chen, Matteo Ippoliti, Matthew Neeley, Nicholas C. Rubin, Austin G. Fowler, Anthony Megrant, Marco Szalay, Trent Huang, Evan Jeffrey, Leon Brill, Justin Iveland, Paul V. Klimov, Matthew D. Trevithick, William Courtney, Nicholas Bushnell, Theodore White, Alexandre Bourassa, E. Lucero, Edward Farhi, Vladimir Shvarts, Dripto M. Debroy, Benjamin Villalonga, Wojciech Mruczkiewicz, Chris Quintana, Juhwan Yoo, Benjamin Chiaro, Dvir Kafri, Brooks Foxen, Vadim Smelyanskiy, Ryan Babbush, Kostyantyn Kechedzhi, Charles Neill, Yu Chen, Andreas Bengtsson, Matt McEwen, A. Opremcak, Kevin C. Miao, Adam Zalcman, Catherine Erickson
Publikováno v:
Nature
Quantum many-body systems display rich phase structure in their low-temperature equilibrium states1. However, much of nature is not in thermal equilibrium. Remarkably, it was recently predicted that out-of-equilibrium systems can exhibit novel dynami
Autor:
William J. Huggins, Kianna Wan, Jarrod McClean, Thomas E. O’Brien, Nathan Wiebe, Ryan Babbush
Publikováno v:
Physical Review Letters. 129
Many quantum algorithms involve the evaluation of expectation values. Optimal strategies for estimating a single expectation value are known, requiring a number of state preparations that scales with the target error $\varepsilon$ as $\mathcal{O}(1/\