Coherent Coupled Qubits for Quantum Annealing
Quantum annealing is an optimization technique which potentially leverages quantum tunneling to enhance computational performance. Existing quantum annealers use superconducting flux qubits with short coherence times limited primarily by the use of large persistent currents I[subscript p]. Here, we...
| Main Authors: | , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Physical Society
2017
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| Online Access: | http://hdl.handle.net/1721.1/110691 https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 |
| _version_ | 1826207065799917568 |
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| author | Weber, Steven J. Samach, Gabriel O. Hover, David J. Gustavsson, Simon Kim, David K. Melville, Alexander J. Rosenberg, Danna Sears, Adam P. Yan, Fei Yoder, Jonilyn Longenecker Oliver, William D Kerman, Andrew J |
| author2 | Lincoln Laboratory |
| author_facet | Lincoln Laboratory Weber, Steven J. Samach, Gabriel O. Hover, David J. Gustavsson, Simon Kim, David K. Melville, Alexander J. Rosenberg, Danna Sears, Adam P. Yan, Fei Yoder, Jonilyn Longenecker Oliver, William D Kerman, Andrew J |
| author_sort | Weber, Steven J. |
| collection | MIT |
| description | Quantum annealing is an optimization technique which potentially leverages quantum tunneling to enhance computational performance. Existing quantum annealers use superconducting flux qubits with short coherence times limited primarily by the use of large persistent currents I[subscript p]. Here, we examine an alternative approach using qubits with smaller I[subscript p] and longer coherence times. We demonstrate tunable coupling, a basic building block for quantum annealing, between two flux qubits with small (approximately 50-nA) persistent currents. Furthermore, we characterize qubit coherence as a function of coupler setting and investigate the effect of flux noise in the coupler loop on qubit coherence. Our results provide insight into the available design space for next-generation quantum annealers with improved coherence. |
| first_indexed | 2024-09-23T13:43:41Z |
| format | Article |
| id | mit-1721.1/110691 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T13:43:41Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1106912022-09-28T15:47:30Z Coherent Coupled Qubits for Quantum Annealing Weber, Steven J. Samach, Gabriel O. Hover, David J. Gustavsson, Simon Kim, David K. Melville, Alexander J. Rosenberg, Danna Sears, Adam P. Yan, Fei Yoder, Jonilyn Longenecker Oliver, William D Kerman, Andrew J Lincoln Laboratory Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Research Laboratory of Electronics Weber, Steven J. Samach, Gabriel O. Hover, David J. Gustavsson, Simon Kim, David K. Melville, Alexander J. Rosenberg, Danna Sears, Adam P. Yan, Fei Yoder, Jonilyn Longenecker Oliver, William D Kerman, Andrew J Quantum annealing is an optimization technique which potentially leverages quantum tunneling to enhance computational performance. Existing quantum annealers use superconducting flux qubits with short coherence times limited primarily by the use of large persistent currents I[subscript p]. Here, we examine an alternative approach using qubits with smaller I[subscript p] and longer coherence times. We demonstrate tunable coupling, a basic building block for quantum annealing, between two flux qubits with small (approximately 50-nA) persistent currents. Furthermore, we characterize qubit coherence as a function of coupler setting and investigate the effect of flux noise in the coupler loop on qubit coherence. Our results provide insight into the available design space for next-generation quantum annealers with improved coherence. United States. Office of the Director of National Intelligence United States. Intelligence Advanced Research Projects Activity United States. Dept. of Defense. Assistant Secretary of Defense for Research & Engineering (FA8721-05-C-0002) 2017-07-12T19:01:13Z 2017-07-12T19:01:13Z 2017-07 2017-01 2017-07-11T19:08:38Z Article http://purl.org/eprint/type/JournalArticle 2331-7019 http://hdl.handle.net/1721.1/110691 Weber, Steven J. et al. “Coherent Coupled Qubits for Quantum Annealing.” Physical Review Applied 8.1 (2017): n. pag. © 2017 American Physical Society https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 en http://dx.doi.org/10.1103/PhysRevApplied.8.014004 Physical Review Applied Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Weber, Steven J. Samach, Gabriel O. Hover, David J. Gustavsson, Simon Kim, David K. Melville, Alexander J. Rosenberg, Danna Sears, Adam P. Yan, Fei Yoder, Jonilyn Longenecker Oliver, William D Kerman, Andrew J Coherent Coupled Qubits for Quantum Annealing |
| title | Coherent Coupled Qubits for Quantum Annealing |
| title_full | Coherent Coupled Qubits for Quantum Annealing |
| title_fullStr | Coherent Coupled Qubits for Quantum Annealing |
| title_full_unstemmed | Coherent Coupled Qubits for Quantum Annealing |
| title_short | Coherent Coupled Qubits for Quantum Annealing |
| title_sort | coherent coupled qubits for quantum annealing |
| url | http://hdl.handle.net/1721.1/110691 https://orcid.org/0000-0002-7069-1025 https://orcid.org/0000-0002-4674-2806 |
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