Charging and energy fluctuations of a driven quantum battery
We consider a quantum battery modelled as a set of N independent two-level quantum systems driven by a time dependent classical source. Different figures of merit, such as stored energy, time of charging and energy quantum fluctuations during the charging process, are characterized in a wide range o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ab91fc |
| _version_ | 1797750181402247168 |
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| author | A Crescente M Carrega M Sassetti D Ferraro |
| author_facet | A Crescente M Carrega M Sassetti D Ferraro |
| author_sort | A Crescente |
| collection | DOAJ |
| description | We consider a quantum battery modelled as a set of N independent two-level quantum systems driven by a time dependent classical source. Different figures of merit, such as stored energy, time of charging and energy quantum fluctuations during the charging process, are characterized in a wide range of parameters, by means of numerical approach and suitable analytical approximation scheme. Particular emphasis is put on the role of different initial conditions, describing the preparation state of the quantum battery, as well as on the sensitivity to the functional form of the external time-dependent drive. It is shown that an optimal charging protocol, characterized by fast charging time and the absence of charging fluctuations, can be achieved starting from the ground state of each two-level system, while other pure preparation states are less efficient. Moreover, we argue that a periodic train of peaked rectangular pulses can lead to fast charging. This study aims at providing a useful theoretical background in view of future experimental solid-state implementations. |
| first_indexed | 2024-03-12T16:29:59Z |
| format | Article |
| id | doaj.art-f3676210a8254a13b50c2d6cbf939a39 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:29:59Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-f3676210a8254a13b50c2d6cbf939a392023-08-08T15:34:55ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122606305710.1088/1367-2630/ab91fcCharging and energy fluctuations of a driven quantum batteryA Crescente0M Carrega1M Sassetti2D Ferraro3Dipartimento di Fisica, Università di Genova , Via Dodecaneso 33, 16146, Genova, Italy; SPIN-CNR , Via Dodecaneso 33, 16146 Genova, ItalyNEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza S. Silvestro 12, I-56127 Pisa, ItalyDipartimento di Fisica, Università di Genova , Via Dodecaneso 33, 16146, Genova, Italy; SPIN-CNR , Via Dodecaneso 33, 16146 Genova, ItalyDipartimento di Fisica, Università di Genova , Via Dodecaneso 33, 16146, Genova, Italy; SPIN-CNR , Via Dodecaneso 33, 16146 Genova, ItalyWe consider a quantum battery modelled as a set of N independent two-level quantum systems driven by a time dependent classical source. Different figures of merit, such as stored energy, time of charging and energy quantum fluctuations during the charging process, are characterized in a wide range of parameters, by means of numerical approach and suitable analytical approximation scheme. Particular emphasis is put on the role of different initial conditions, describing the preparation state of the quantum battery, as well as on the sensitivity to the functional form of the external time-dependent drive. It is shown that an optimal charging protocol, characterized by fast charging time and the absence of charging fluctuations, can be achieved starting from the ground state of each two-level system, while other pure preparation states are less efficient. Moreover, we argue that a periodic train of peaked rectangular pulses can lead to fast charging. This study aims at providing a useful theoretical background in view of future experimental solid-state implementations.https://doi.org/10.1088/1367-2630/ab91fcquantum batteriesdriven quantum systemenergy fluctuations in quantum devices |
| spellingShingle | A Crescente M Carrega M Sassetti D Ferraro Charging and energy fluctuations of a driven quantum battery New Journal of Physics quantum batteries driven quantum system energy fluctuations in quantum devices |
| title | Charging and energy fluctuations of a driven quantum battery |
| title_full | Charging and energy fluctuations of a driven quantum battery |
| title_fullStr | Charging and energy fluctuations of a driven quantum battery |
| title_full_unstemmed | Charging and energy fluctuations of a driven quantum battery |
| title_short | Charging and energy fluctuations of a driven quantum battery |
| title_sort | charging and energy fluctuations of a driven quantum battery |
| topic | quantum batteries driven quantum system energy fluctuations in quantum devices |
| url | https://doi.org/10.1088/1367-2630/ab91fc |
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