Coherent-state transfer via highly mixed quantum spin chains
Spin chains have been proposed as quantum wires in many quantum-information processing architectures. Coherent transmission of quantum information in spin chains over short distances is enabled by their internal dynamics, which drives the transport of single-spin excitations in perfectly polarized c...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/65561 https://orcid.org/0000-0003-3207-594X |
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| author | Cappellaro, Paola Viola, Lorenza Ramanathan, Chandrasekhar |
| author2 | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Cappellaro, Paola Viola, Lorenza Ramanathan, Chandrasekhar |
| author_sort | Cappellaro, Paola |
| collection | MIT |
| description | Spin chains have been proposed as quantum wires in many quantum-information processing architectures. Coherent transmission of quantum information in spin chains over short distances is enabled by their internal dynamics, which drives the transport of single-spin excitations in perfectly polarized chains. Given the practical challenge of preparing the chain in a pure state, we propose to use a chain that is initially in the maximally mixed state. We compare the transport properties of pure and mixed-state chains and find similarities that enable the experimental study of pure-state transfer via mixed-state chains. We also demonstrate protocols for the perfect transfer of quantum information in these chains. Remarkably, mixed-state chains allow the use of Hamiltonians that do not preserve the total number of single-spin excitations and are more readily obtainable from the naturally occurring magnetic dipolar interaction. We discuss experimental implementations using solid-state nuclear magnetic resonance and defect centers in diamond. |
| first_indexed | 2024-09-23T15:19:32Z |
| format | Article |
| id | mit-1721.1/65561 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:19:32Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/655612022-09-29T14:13:41Z Coherent-state transfer via highly mixed quantum spin chains Cappellaro, Paola Viola, Lorenza Ramanathan, Chandrasekhar Massachusetts Institute of Technology. Department of Nuclear Science and Engineering Cappellaro, Paola Cappellaro, Paola Spin chains have been proposed as quantum wires in many quantum-information processing architectures. Coherent transmission of quantum information in spin chains over short distances is enabled by their internal dynamics, which drives the transport of single-spin excitations in perfectly polarized chains. Given the practical challenge of preparing the chain in a pure state, we propose to use a chain that is initially in the maximally mixed state. We compare the transport properties of pure and mixed-state chains and find similarities that enable the experimental study of pure-state transfer via mixed-state chains. We also demonstrate protocols for the perfect transfer of quantum information in these chains. Remarkably, mixed-state chains allow the use of Hamiltonians that do not preserve the total number of single-spin excitations and are more readily obtainable from the naturally occurring magnetic dipolar interaction. We discuss experimental implementations using solid-state nuclear magnetic resonance and defect centers in diamond. National Science Foundation (U.S.) (grant DMR-1005926) National Science Foundation (U.S.) (grant PHY-0903727) 2011-08-31T14:46:57Z 2011-08-31T14:46:57Z 2011-03 2010-11 Article http://purl.org/eprint/type/JournalArticle 1050-2947 1094-1622 http://hdl.handle.net/1721.1/65561 Cappellaro, Paola, Lorenza Viola, and Chandrasekhar Ramanathan. “Coherent-state Transfer via Highly Mixed Quantum Spin Chains.” Physical Review A 83.3 (2011) ©2011 American Physical Society https://orcid.org/0000-0003-3207-594X en_US http://dx.doi.org/10.1103/PhysRevA.83.032304 Physical Review A 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. application/pdf American Physical Society APS |
| spellingShingle | Cappellaro, Paola Viola, Lorenza Ramanathan, Chandrasekhar Coherent-state transfer via highly mixed quantum spin chains |
| title | Coherent-state transfer via highly mixed quantum spin chains |
| title_full | Coherent-state transfer via highly mixed quantum spin chains |
| title_fullStr | Coherent-state transfer via highly mixed quantum spin chains |
| title_full_unstemmed | Coherent-state transfer via highly mixed quantum spin chains |
| title_short | Coherent-state transfer via highly mixed quantum spin chains |
| title_sort | coherent state transfer via highly mixed quantum spin chains |
| url | http://hdl.handle.net/1721.1/65561 https://orcid.org/0000-0003-3207-594X |
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