Zobrazeno 1 - 10
of 200
pro vyhledávání: '"Robert Joynt"'
Autor:
Benjamin D. Woods, Hudaiba Soomro, E. S. Joseph, Collin C. D. Frink, Robert Joynt, M. A. Eriksson, Mark Friesen
Publikováno v:
npj Quantum Information, Vol 10, Iss 1, Pp 1-8 (2024)
Abstract Engineering conduction-band valley couplings is a key challenge for Si-based spin qubits. Recent work has shown that the most reliable method for enhancing valley couplings entails adding Ge concentration oscillations to the quantum well. Ho
Externí odkaz:
https://doaj.org/article/e3aab29746d64381a455fb115dd4651e
Autor:
Thomas McJunkin, Benjamin Harpt, Yi Feng, Merritt P. Losert, Rajib Rahman, J. P. Dodson, M. A. Wolfe, D. E. Savage, M. G. Lagally, S. N. Coppersmith, Mark Friesen, Robert Joynt, M. A. Eriksson
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-7 (2022)
Quantum-dot spin qubits in Si/SiGe quantum wells require a large and uniform valley splitting for robust operation and scalability. Here the authors introduce and characterize a new heterostructure with periodic oscillations of Ge atoms in the quantu
Externí odkaz:
https://doaj.org/article/53757d2125b740fe942bcf04e71a3b95
Autor:
Yujun Choi, Robert Joynt
Publikováno v:
Physical Review Research, Vol 6, Iss 1, p 013168 (2024)
Semiconductor qubit devices suffer from the drift of important device parameters as they are operated. The most important example is a shift in qubit operating frequencies. This effect appears to be directly related to the heating of the system as ga
Externí odkaz:
https://doaj.org/article/29e83ac636a54f76abbe09b496a5ad4d
Autor:
Yujun Choi, Robert Joynt
Publikováno v:
npj Quantum Information, Vol 8, Iss 1, Pp 1-9 (2022)
Abstract Electron spin qubits are a promising platform for quantum computation. Environmental noise impedes coherent operations by limiting the qubit relaxation (T 1) and dephasing (T ϕ ) times. There are multiple sources of such noise, which makes
Externí odkaz:
https://doaj.org/article/62fb69fa1962479b9da2f2e33068fce7
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p 023147 (2023)
The quantum approximate optimization algorithm (QAOA) is a promising method for solving certain classical combinatorial optimization problems on near-term quantum devices. When employing the QAOA to 3-SAT and Max-3-SAT problems, the quantum cost exhi
Externí odkaz:
https://doaj.org/article/f67543e3acae45b0b4e7f1f02b1d4e51
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023249 (2022)
The quantum approximate optimization algorithm (QAOA) transforms a simple many-qubit wave function into one that encodes a solution to a difficult classical optimization problem. It does this by optimizing the schedule according to which two unitary
Externí odkaz:
https://doaj.org/article/24984c8e2ff349418f6b25d550698705
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013092 (2021)
We propose a method to speed up the quantum adiabatic algorithm using catalysis by many-body delocalization. This is applied to random-field antiferromagnetic Ising spin models. The algorithm is catalyzed in such a way that the evolution approximates
Externí odkaz:
https://doaj.org/article/f12d2e07cb3e4cb98a497873038c22fc
Autor:
Yi Feng, Robert Joynt
The valley degeneracy in Si qubit devices presents problems for their use in quantum information processing. It is possible to lift this degeneracy by using the Wiggle Well architecture, in which an oscillatory Ge concentration couples the valleys. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d440e24cfb7341fdfcac805ab716de2
http://arxiv.org/abs/2206.08331
http://arxiv.org/abs/2206.08331
Autor:
Abraham Asfaw, Alexandre Blais, Kenneth R. Brown, Jonathan Candelaria, Christopher Cantwell, Lincoln D. Carr, Joshua Combes, Dripto M. Debroy, John M. Donohue, Sophia E. Economou, Emily Edwards, Michael F. J. Fox, Steven M. Girvin, Alan Ho, Hilary M. Hurst, Zubin Jacob, Blake R. Johnson, Ezekiel Johnston-Halperin, Robert Joynt, Eliot Kapit, Judith Klein-Seetharaman, Martin Laforest, H. J. Lewandowski, Theresa W. Lynn, Corey Rae H. McRae, Celia Merzbacher, Spyridon Michalakis, Prineha Narang, William D. Oliver, Jens Palsberg, David P. Pappas, Michael G. Raymer, David J. Reilly, Mark Saffman, Thomas A. Searles, Jeffrey H. Shapiro, Chandralekha Singh
The rapidly growing quantum information science and engineering (QISE) industry will require both quantum-aware and quantum-proficient engineers at the bachelor's level. We provide a roadmap for building a quantum engineering education program to sat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cdb64c28b71d0178b4467b293441c36
https://resolver.caltech.edu/CaltechAUTHORS:20220210-721846000
https://resolver.caltech.edu/CaltechAUTHORS:20220210-721846000
We show that Ge concentration oscillations within the quantum well region of a Si/SiGe heterostructure can significantly enhance the spin-orbit coupling of the low-energy conduction-band valleys. Specifically, we find that for Ge oscillation waveleng
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93599243c3444d5231e48ad13f6170fe