Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival
We study the time degradation of quantum information stored in a quantum memory device under a dissipative environment in a parameter range which is experimentally relevant. The quantum memory under consideration is comprised of an optomechanical system with additional Kerr nonlinearity in the optic...
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MDPI AG
2022-08-01
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| author | Tavshabad Kaur Maninder Kaur Arvind Bindiya Arora |
| author_facet | Tavshabad Kaur Maninder Kaur Arvind Bindiya Arora |
| author_sort | Tavshabad Kaur |
| collection | DOAJ |
| description | We study the time degradation of quantum information stored in a quantum memory device under a dissipative environment in a parameter range which is experimentally relevant. The quantum memory under consideration is comprised of an optomechanical system with additional Kerr nonlinearity in the optical mode and an anharmonic mechanical oscillator with quadratic nonlinearity. Time degradation is monitored, both in terms of loss of coherence, which is analyzed with the help of Wigner functions, as well as in terms of loss of amplitude of the original state, studied as a function of time. While our time trajectories explore the degree to which the stored information degrades depending upon the variation in values of various parameters involved, we suggest a set of parameters for which the original information can be retrieved without degradation. We identify a very interesting situation where the role played by the nonlinearity is insignificant, and the system behaves as if the information is stored in a linear medium. For this case, the information retrieval is independent of the coherence revival time and can be retrieved at any instant during the time evolution. |
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| format | Article |
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| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-10T00:45:07Z |
| publishDate | 2022-08-01 |
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| spelling | doaj.art-6a3ae700189e462bb5704bd4620f74752023-11-23T15:01:23ZengMDPI AGAtoms2218-20042022-08-011038110.3390/atoms10030081Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum RevivalTavshabad Kaur0Maninder Kaur1Arvind2Bindiya Arora3Department of Physics, Guru Nanak Dev University, Amritsar 143005, Punjab, IndiaDepartment of Physics, Guru Nanak Dev University, Amritsar 143005, Punjab, IndiaDepartment of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, PO Manauli, Mohali 140306, Punjab, IndiaDepartment of Physics, Guru Nanak Dev University, Amritsar 143005, Punjab, IndiaWe study the time degradation of quantum information stored in a quantum memory device under a dissipative environment in a parameter range which is experimentally relevant. The quantum memory under consideration is comprised of an optomechanical system with additional Kerr nonlinearity in the optical mode and an anharmonic mechanical oscillator with quadratic nonlinearity. Time degradation is monitored, both in terms of loss of coherence, which is analyzed with the help of Wigner functions, as well as in terms of loss of amplitude of the original state, studied as a function of time. While our time trajectories explore the degree to which the stored information degrades depending upon the variation in values of various parameters involved, we suggest a set of parameters for which the original information can be retrieved without degradation. We identify a very interesting situation where the role played by the nonlinearity is insignificant, and the system behaves as if the information is stored in a linear medium. For this case, the information retrieval is independent of the coherence revival time and can be retrieved at any instant during the time evolution.https://www.mdpi.com/2218-2004/10/3/81quantum memoryoptomechanical systemquantum master equationWigner functioncoherence revival time |
| spellingShingle | Tavshabad Kaur Maninder Kaur Arvind Bindiya Arora Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival Atoms quantum memory optomechanical system quantum master equation Wigner function coherence revival time |
| title | Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival |
| title_full | Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival |
| title_fullStr | Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival |
| title_full_unstemmed | Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival |
| title_short | Generating Sustained Coherence in a Quantum Memory for Retrieval at Times of Quantum Revival |
| title_sort | generating sustained coherence in a quantum memory for retrieval at times of quantum revival |
| topic | quantum memory optomechanical system quantum master equation Wigner function coherence revival time |
| url | https://www.mdpi.com/2218-2004/10/3/81 |
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