Dynamical decoupling efficiency versus quantum non-Markovianity
We investigate the relationship between non-Markovianity and the effectiveness of a dynamical decoupling (DD) protocol for qubits undergoing pure dephasing. We consider an exact model in which dephasing arises due to a bosonic environment with a spectral density of the Ohmic class. This is parametri...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/12/123004 |
| _version_ | 1797751034267828224 |
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| author | Carole Addis Francesco Ciccarello Michele Cascio G Massimo Palma Sabrina Maniscalco |
| author_facet | Carole Addis Francesco Ciccarello Michele Cascio G Massimo Palma Sabrina Maniscalco |
| author_sort | Carole Addis |
| collection | DOAJ |
| description | We investigate the relationship between non-Markovianity and the effectiveness of a dynamical decoupling (DD) protocol for qubits undergoing pure dephasing. We consider an exact model in which dephasing arises due to a bosonic environment with a spectral density of the Ohmic class. This is parametrized by an Ohmicity parameter by changing which we can model both Markovian and non-Markovian environments. Interestingly, we find that engineering a non-Markovian environment is detrimental to the efficiency of the DD scheme, leading to a worse coherence preservation. We show that each DD pulse reverses the flow of quantum information and, on this basis, we investigate the connection between DD efficiency and the reservoir spectral density. Finally, in the spirit of reservoir engineering, we investigate the optimum system-reservoir parameters for achieving maximum stationary coherences. |
| first_indexed | 2024-03-12T16:42:32Z |
| format | Article |
| id | doaj.art-7467d38cb8cb40e8b37ee54298ed7796 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:32Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-7467d38cb8cb40e8b37ee54298ed77962023-08-08T14:24:15ZengIOP PublishingNew Journal of Physics1367-26302015-01-01171212300410.1088/1367-2630/17/12/123004Dynamical decoupling efficiency versus quantum non-MarkovianityCarole Addis0Francesco Ciccarello1Michele Cascio2G Massimo Palma3Sabrina Maniscalco4SUPA, EPS/Physics, Heriot-Watt University , Edinburgh EH14 4AS, UKNEST-INFM (CNR) and Dipartimento di Fisica e Chimica, Università degli Studi di Palermo , Via Archirafi 36, I-90123 Palermo, ItalyDipartimento di Fisica e Chimica, Università degli Studi di Palermo , Via Archirafi 36, I-90123 Palermo, ItalyNEST-INFM (CNR) and Dipartimento di Fisica e Chimica, Università degli Studi di Palermo , Via Archirafi 36, I-90123 Palermo, ItalyTurku Center for Quantum Physics, Department of Physics and Astronomy, University of Turku , FI-20014 Turku, FinlandWe investigate the relationship between non-Markovianity and the effectiveness of a dynamical decoupling (DD) protocol for qubits undergoing pure dephasing. We consider an exact model in which dephasing arises due to a bosonic environment with a spectral density of the Ohmic class. This is parametrized by an Ohmicity parameter by changing which we can model both Markovian and non-Markovian environments. Interestingly, we find that engineering a non-Markovian environment is detrimental to the efficiency of the DD scheme, leading to a worse coherence preservation. We show that each DD pulse reverses the flow of quantum information and, on this basis, we investigate the connection between DD efficiency and the reservoir spectral density. Finally, in the spirit of reservoir engineering, we investigate the optimum system-reservoir parameters for achieving maximum stationary coherences.https://doi.org/10.1088/1367-2630/17/12/123004non-Markovianitydynamical decouplingreservoir engineeringOhmic spectrapure dephasingopen quantum systems |
| spellingShingle | Carole Addis Francesco Ciccarello Michele Cascio G Massimo Palma Sabrina Maniscalco Dynamical decoupling efficiency versus quantum non-Markovianity New Journal of Physics non-Markovianity dynamical decoupling reservoir engineering Ohmic spectra pure dephasing open quantum systems |
| title | Dynamical decoupling efficiency versus quantum non-Markovianity |
| title_full | Dynamical decoupling efficiency versus quantum non-Markovianity |
| title_fullStr | Dynamical decoupling efficiency versus quantum non-Markovianity |
| title_full_unstemmed | Dynamical decoupling efficiency versus quantum non-Markovianity |
| title_short | Dynamical decoupling efficiency versus quantum non-Markovianity |
| title_sort | dynamical decoupling efficiency versus quantum non markovianity |
| topic | non-Markovianity dynamical decoupling reservoir engineering Ohmic spectra pure dephasing open quantum systems |
| url | https://doi.org/10.1088/1367-2630/17/12/123004 |
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