Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Jens Jakob Sørensen"'
Autor:
Jesper Hasseriis Mohr Jensen, Miroslav Gajdacz, Shaeema Zaman Ahmed, Jakub Herman Czarkowski, Carrie Weidner, Janet Rafner, Jens Jakob Sørensen, Klaus Mølmer, Jacob Friis Sherson
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013057 (2021)
Citizen science methodologies have over the past decade been applied with great success to help solve highly complex numerical challenges. Here, we take early steps in the quantum physics arena by introducing a citizen science game, Quantum Moves 2,
Externí odkaz:
https://doaj.org/article/380fbdef4a9247b08a4246b04541dcdf
Publikováno v:
Jensen, J H M, Møller, F S, Sørensen, J J W H & Sherson, J 2021, ' Achieving fast high-fidelity optimal control of many-body quantum dynamics ', Physical Review A, vol. 104, no. 5, 052210 . https://doi.org/10.1103/PhysRevA.104.052210
We demonstrate the efficiency of a recent exact-gradient optimal control methodology by applying it to a challenging many-body problem, crossing the superfluid to Mott-insulator phase transition in the Bose-Hubbard model. The system size necessitates
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::743dd5aa62d665b62ad67ec878665fd9
https://pure.au.dk/portal/da/publications/achieving-fast-highfidelity-optimal-control-of-manybody-quantum-dynamics(973167ec-fc14-48db-9e4d-11da8cce98e9).html
https://pure.au.dk/portal/da/publications/achieving-fast-highfidelity-optimal-control-of-manybody-quantum-dynamics(973167ec-fc14-48db-9e4d-11da8cce98e9).html
Publikováno v:
Jensen, J H M, Møller, F S, Sørensen, J J & Sherson, J F 2021, ' Approximate dynamics leading to more optimal control : Efficient exact derivatives ', Physical Review A, vol. 103, no. 6, 062612 . https://doi.org/10.1103/PhysRevA.103.062612
Accurate derivatives are important for efficiently locally traversing and converging in quantum optimization landscapes. By deriving analytically exact control derivatives (gradient and Hessian) for unitary control tasks, we show here that the comput
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a6655fa34b6706e40f8b1d077d195043
https://pure.au.dk/portal/da/publications/approximate-dynamics-leading-to-more-optimal-control(abcf7fc6-fa49-4bec-9340-aedc6d330f9b).html
https://pure.au.dk/portal/da/publications/approximate-dynamics-leading-to-more-optimal-control(abcf7fc6-fa49-4bec-9340-aedc6d330f9b).html
Autor:
Shaeema Zaman Ahmed, Klaus Mølmer, C. A. Weidner, Jesper Hasseriis Mohr Jensen, Jacob F. Sherson, Janet Rafner, Miroslav Gajdacz, Jakub Herman Czarkowski, Jens Jakob Sørensen
Publikováno v:
Jensen, J H M, Gajdacz, M, Ahmed, S Z, Czarkowski, J H, Weidner, C A, Rafner, J F, Sørensen, J J W H, Mølmer, K & Sherson, J 2021, ' Crowdsourcing human common sense for quantum control ', Physical Review Research, bind 3, nr. 1, 013057 . https://doi.org/10.1103/PhysRevResearch.3.013057
Physical Review Research
Physical Review Research
Citizen science methodologies have over the past decade been applied with great success to help solve highly complex numerical challenges. Here, we take early steps in the quantum physics arena by introducing a citizen science game, Quantum Moves 2,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a11cc1bf66853580442fdbee4428ebe
Publikováno v:
The Journal of Chemical Physics
Sørensen, J J W H, Nyemann, J S, Motzoi, F, Sherson, J & Vosegaard, T 2020, ' Optimization of Pulses with Low Bandwidth for Improved Excitation of Multiple-Quantum Coherences in NMR of Quadrupolar Nuclei ', Journal of Chemical Physics, vol. 152, no. 5, 054104 . https://doi.org/10.1063/1.5141384
Sørensen, J J W H, Nyemann, J S, Motzoi, F, Sherson, J & Vosegaard, T 2020, ' Optimization of Pulses with Low Bandwidth for Improved Excitation of Multiple-Quantum Coherences in NMR of Quadrupolar Nuclei ', Journal of Chemical Physics, vol. 152, no. 5, 054104 . https://doi.org/10.1063/1.5141384
We discuss the commonly encountered problem when optimizing NMR pulses using optimal control that the otherwise very precise NMR theory does not provide as excellent agreement with experiments. We hypothesize that this disagreement is due to phase tr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64c61bbf4df2b686967b89bb1a909ee1
Publikováno v:
npj Quantum Information, Vol 6, Iss 1, Pp 1-9 (2020)
Dalgaard, M, Motzoi, F, Sørensen, J J & Sherson, J 2020, ' Global optimization of quantum dynamics with AlphaZero deep exploration ', npj Quantum Information, vol. 6, no. 1, 6 . https://doi.org/10.1038/s41534-019-0241-0
npj Quantum Information
Dalgaard, M, Motzoi, F, Sørensen, J J & Sherson, J 2020, ' Global optimization of quantum dynamics with AlphaZero deep exploration ', npj Quantum Information, vol. 6, no. 1, 6 . https://doi.org/10.1038/s41534-019-0241-0
npj Quantum Information
While a large number of algorithms for optimizing quantum dynamics for different objectives have been developed, a common limitation is the reliance on good initial guesses, being either random or based on heuristics and intuitions. Here we implement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de086f071df2a53ae653812488b723cc
http://arxiv.org/abs/1907.05672
http://arxiv.org/abs/1907.05672
Publikováno v:
Physical Review A
Jensen, J H M, Sørensen, J J, Mølmer, K & Sherson, J F 2019, ' Time-optimal control of collisional SWAP gates in ultracold atomic systems ', Physical Review A, vol. 100, no. 5, 052314 . https://doi.org/10.1103/PhysRevA.100.052314
Jensen, J H M, Sørensen, J J, Mølmer, K & Sherson, J F 2019, ' Time-optimal control of collisional SWAP gates in ultracold atomic systems ', Physical Review A, vol. 100, no. 5, 052314 . https://doi.org/10.1103/PhysRevA.100.052314
We use quantum optimal control to identify fast collision-based two-qubit $\sqrt{\mathrm{SWAP}}$ gates in ultracold atoms. We show that a significant speedup can be achieved by optimizing the full gate instead of separately optimizing the merge-wait-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11cf420b875ead532d265b247961354a
Autor:
Pinja Haikka, Jesper Halkjær Jensen, Tilo Planke, Jens Jakob Sørensen, Jacob F. Sherson, Klaus Mølmer, Mads Kock Pedersen, Miroslav Gajdacz, Morten Ginnerup Andreasen, Andreas Lieberoth, M. Munch
Publikováno v:
Nature. 584:484-484
Humans routinely solve problems of immense computational complexity by intuitively forming simple, low-dimensional heuristic strategies. Citizen science (or crowd sourcing) is a way of exploiting this ability by presenting scientific research problem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ee72b57cc56e0d2171e2ed50f690f4b
https://doi.org/10.1038/s41586-020-2515-2
https://doi.org/10.1038/s41586-020-2515-2
Autor:
Morten Ginnerup Andreasen, Miroslav Gajdacz, Tilo Planke, Jens Jakob Sørensen, M. Munch, Jacob F. Sherson, Mads Kock Pedersen, Andreas Lieberoth, Klaus Mølmer, Pinja Haikka, Jesper Halkjær Jensen
Publikováno v:
Sørensen, J J W H, Pedersen, M K, Munch, M, Haikka, P, Jensen, J H, Planke, T, Andreasen, M G, Gajdacz, M, Mølmer, K, Lieberoth, A & Sherson, J F 2020, ' Editorial Expression of Concern: Exploring the quantum speed limit with computer games (Nature) ', Nature, vol. 581, no. 7808, E7 . https://doi.org/10.1038/s41586-020-2274-0
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d766daa4205e3b2e70c191fdb3b0d78
https://doi.org/10.1038/s41586-020-2274-0
https://doi.org/10.1038/s41586-020-2274-0
Autor:
Jens Jakob Sørensen, Robert Heck, Ottó Elíasson, Simone Montangero, Morten Ginnerup Andreasen, Mark G. Bason, Andrew Mao, Jacob F. Sherson, Mads Kock Pedersen, Jens S. Laustsen, Mario Napolitano, Romain Müller, Lærke L. Nielsen, Tommaso Calarco, Pinja Haikka, Jonathan K. Zoller, Poul Ejlertsen, Carsten Bergenholtz, Aske Thorsen, Oana Vuculescu
Publikováno v:
Heck, R, Vuculescu, O, Sorensen, J J, Zoller, J, Andreasen, M G, Bason, M G, Ejlertsen, P, Eliasson, O, Haikka, P, Laustsen, J S, Nielsen, L L, Mao, A, Mueller, R, Napolitano, M, Pedersen, M K, Thorsen, A R, Bergenholtz, C, Calarco, T, Montangero, S & Sherson, J F 2018, ' Remote optimization of an ultracold atoms experiment by experts and citizen scientists ', Proceedings of the National Academy of Sciences of the United States of America, vol. 115, no. 48, pp. E11231-E11237 . https://doi.org/10.1073/pnas.1716869115
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences of the United States of America
Proceedings of the National Academy of Sciences
Proceedings of the National Academy of Sciences of the United States of America
Significance The emerging field of gamified citizen science continually probes the fault line between human and artificial intelligence. A better understanding of citizen scientists’ search strategies may lead to cognitive insights and provide insp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6a685f640c449fcae7bf30fb1826b3d
https://pure.au.dk/ws/files/138259235/E11231.full.pdf
https://pure.au.dk/ws/files/138259235/E11231.full.pdf