[{"@context":"http:\/\/schema.org\/","@type":"BlogPosting","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/dynamical-decoupling-wikipedia\/#BlogPosting","mainEntityOfPage":"https:\/\/wiki.edu.vn\/en\/wiki24\/dynamical-decoupling-wikipedia\/","headline":"Dynamical decoupling – Wikipedia","name":"Dynamical decoupling – Wikipedia","description":"From Wikipedia, the free encyclopedia Quantum coherency control technique for quantum computing Dynamical decoupling (DD) is an open-loop quantum control","datePublished":"2014-11-09","dateModified":"2014-11-09","author":{"@type":"Person","@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/#Person","name":"lordneo","url":"https:\/\/wiki.edu.vn\/en\/wiki24\/author\/lordneo\/","image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/c9645c498c9701c88b89b8537773dd7c?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Enzyklop\u00e4die","logo":{"@type":"ImageObject","@id":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","url":"https:\/\/wiki.edu.vn\/wiki4\/wp-content\/uploads\/2023\/08\/download.jpg","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","url":"https:\/\/en.wikipedia.org\/wiki\/Special:CentralAutoLogin\/start?type=1x1","height":"1","width":"1"},"url":"https:\/\/wiki.edu.vn\/en\/wiki24\/dynamical-decoupling-wikipedia\/","wordCount":3279,"articleBody":"From Wikipedia, the free encyclopediaQuantum coherency control technique for quantum computingDynamical decoupling (DD) is an open-loop quantum control technique employed in quantum computing to suppress decoherence by taking advantage of rapid, time-dependent control modulation.  In its simplest form, DD is implemented by periodic sequences of instantaneous control pulses, whose net effect is to approximately average the unwanted system-environment coupling to zero.[1][2] Different schemes exist for designing DD protocols that use realistic bounded-strength control pulses,[3] as well as for achieving high-order error suppression,[4][5] and for making DD compatible with quantum gates.[6][7][8] In spin systems in particular, commonly used protocols for dynamical decoupling include the Carr-Purcell and the Carr-Purcell-Meiboom-Gill schemes.[9][10] They are based on the Hahn spin echo technique of applying periodic pulses to enable refocusing and hence extend the coherence times of qubits.Periodic repetition of suitable high-order DD sequences may be employed to engineer a \u2018stroboscopic saturation\u2019 of qubit coherence, or coherence plateau, that can persist in the presence of realistic noise spectra and experimental control imperfections. This permits device-independent, high-fidelity data storage for computationally useful periods with bounded error probability.[11]Dynamical decoupling has also been studied in a classical context for two coupled pendulums whose oscillation frequencies are modulated in time.[12]References[edit]^ Viola, L.; Lloyd, S. (1998). “Dynamical suppression of decoherence in two-state quantum systems”. Physical Review A. 58 (4): 2733\u20132744. arXiv:quant-ph\/9803057. Bibcode:1998PhRvA..58.2733V. doi:10.1103\/PhysRevA.58.2733. S2CID\u00a034939261.^ Viola, L.; Knill, E.; Lloyd, S. (1999). “Dynamical Decoupling of Open Quantum Systems”. Physical Review Letters. 82 (12): 2417\u20132421. arXiv:quant-ph\/9809071. Bibcode:1999PhRvL..82.2417V. doi:10.1103\/PhysRevLett.82.2417. S2CID\u00a02566091.^ Viola, L.; Knill, E. (2003). “Robust Dynamical Decoupling of Quantum Systems with Bounded Controls”. Physical Review Letters. 90 (3): 037901. arXiv:quant-ph\/0208056. Bibcode:2003PhRvL..90c7901V. doi:10.1103\/PhysRevLett.90.037901. PMID\u00a012570525. S2CID\u00a032354220.^ Khodjasteh, K.; Lidar, D. (2005). “Fault-Tolerant Quantum Dynamical Decoupling”. Physical Review Letters. 95 (18): 180501. arXiv:quant-ph\/0408128. Bibcode:2005PhRvL..95r0501K. doi:10.1103\/PhysRevLett.95.180501. PMID\u00a016383882. S2CID\u00a09754216.^ Uhrig, G. S. (2007). “Keeping a Quantum Bit Alive by Optimized \u03c0-Pulse Sequences”. Physical Review Letters. 98 (10): 100504. arXiv:quant-ph\/0609203. Bibcode:2007PhRvL..98j0504U. doi:10.1103\/PhysRevLett.98.100504. PMID\u00a017358521. S2CID\u00a014729824.^ Viola, L.; Lloyd, S.; Knill, E. (1999). “Universal Control of Decoupled Quantum Systems”. Physical Review Letters. 83 (23): 4888\u20134891. arXiv:quant-ph\/9906094. Bibcode:1999PhRvL..83.4888V. doi:10.1103\/PhysRevLett.83.4888. S2CID\u00a043014936.^ West, J. R.; Lidar, D. A.; Fong, B. H.; Gyure, M. F. (2011). “High Fidelity Quantum Gates via Dynamical Decoupling”. Physical Review Letters. 105 (23): 230503. arXiv:0911.2398. Bibcode:2010PhRvL.105w0503W. doi:10.1103\/PhysRevLett.105.230503. PMID\u00a021231440. S2CID\u00a018535780.^ Yang, W.; Wang, Z. Y.; Liu, R. B. (2010). “Preserving qubit coherence by dynamical decoupling”. Frontiers of Physics. 6 (1): 2\u201314. arXiv:1007.0623. Bibcode:2011FrPhy…6….2Y. doi:10.1007\/s11467-010-0113-8. S2CID\u00a0118681892.^ Carr, H. Y.; Purcell, E. M. (1954-05-01). “Effects of Diffusion on Free Precession in Nuclear Magnetic Resonance Experiments”. Physical Review. 94 (3): 630\u2013638. Bibcode:1954PhRv…94..630C. doi:10.1103\/PhysRev.94.630.^ Meiboom, S.; Gill, D. (1958-08-01). “Modified Spin\u2010Echo Method for Measuring Nuclear Relaxation Times”. Review of Scientific Instruments. 29 (8): 688\u2013691. Bibcode:1958RScI…29..688M. doi:10.1063\/1.1716296. ISSN\u00a00034-6748.^ Khodjasteh, K.; Sastrawan, J.; Hayes, D.; Green, T. J.; Biercuk, M. J.; Viola, L. (2013). “Designing a practical high-fidelity long-time quantum memory”. Nature Communications. 4: 2045. arXiv:1206.6087. Bibcode:2013NatCo…4.2045K. doi:10.1038\/ncomms3045. PMID\u00a023784079. S2CID\u00a0205317873.^ Salerno, Grazia; Carusotto, Iacopo (2014). “Dynamical decoupling and dynamical isolation in temporally modulated coupled pendulums”. EPL. 106 (2): 24002. arXiv:1401.3978. Bibcode:2014EL….10624002S. doi:10.1209\/0295-5075\/106\/24002. ISSN\u00a00295-5075. S2CID\u00a0119236165.  "},{"@context":"http:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/#breadcrumbitem","name":"Enzyklop\u00e4die"}},{"@type":"ListItem","position":2,"item":{"@id":"https:\/\/wiki.edu.vn\/en\/wiki24\/dynamical-decoupling-wikipedia\/#breadcrumbitem","name":"Dynamical decoupling – Wikipedia"}}]}]