Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise
Quantum metrology overcomes standard precision limits and has the potential to play a key role in quantum sensing. Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurements. Conventional bounds to the measurement precision such as the shot noise...
| 出版年: | Entropy |
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| 主要な著者: | , , |
| フォーマット: | 論文 |
| 言語: | 英語 |
| 出版事項: |
MDPI AG
2021-05-01
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| 主題: | |
| オンライン･アクセス: | https://www.mdpi.com/1099-4300/23/6/685 |
| _version_ | 1850088556406505472 |
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| author | Arunava Majumder Harshank Shrotriya Leong-Chuan Kwek |
| author_facet | Arunava Majumder Harshank Shrotriya Leong-Chuan Kwek |
| author_sort | Arunava Majumder |
| collection | DOAJ |
| container_title | Entropy |
| description | Quantum metrology overcomes standard precision limits and has the potential to play a key role in quantum sensing. Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurements. Conventional bounds to the measurement precision such as the shot noise limit are not as fundamental as the Heisenberg limits, and can be beaten with quantum strategies that employ ‘quantum tricks’ such as squeezing and entanglement. Bipartite entangled quantum states with a positive partial transpose (PPT), i.e., PPT entangled states, are usually considered to be too weakly entangled for applications. Since no pure entanglement can be distilled from them, they are also called bound entangled states. We provide strategies, using which multipartite quantum states that have a positive partial transpose with respect to all bi-partitions of the particles can still outperform separable states in linear interferometers. |
| format | Article |
| id | doaj-art-e7323af256ce4e15bb78434cc3e659c9 |
| institution | Directory of Open Access Journals |
| issn | 1099-4300 |
| language | English |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| spelling | doaj-art-e7323af256ce4e15bb78434cc3e659c92025-08-20T00:09:53ZengMDPI AGEntropy1099-43002021-05-0123668510.3390/e23060685Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with NoiseArunava Majumder0Harshank Shrotriya1Leong-Chuan Kwek2Indian Institute of Technology Kharagpur, Kharagpur 721302, IndiaCentre for Quantum Technologies, National University of Singapore, Singapore 117543, SingaporeCentre for Quantum Technologies, National University of Singapore, Singapore 117543, SingaporeQuantum metrology overcomes standard precision limits and has the potential to play a key role in quantum sensing. Quantum mechanics, through the Heisenberg uncertainty principle, imposes limits on the precision of measurements. Conventional bounds to the measurement precision such as the shot noise limit are not as fundamental as the Heisenberg limits, and can be beaten with quantum strategies that employ ‘quantum tricks’ such as squeezing and entanglement. Bipartite entangled quantum states with a positive partial transpose (PPT), i.e., PPT entangled states, are usually considered to be too weakly entangled for applications. Since no pure entanglement can be distilled from them, they are also called bound entangled states. We provide strategies, using which multipartite quantum states that have a positive partial transpose with respect to all bi-partitions of the particles can still outperform separable states in linear interferometers.https://www.mdpi.com/1099-4300/23/6/685PPTquantum metrologyentanglement |
| spellingShingle | Arunava Majumder Harshank Shrotriya Leong-Chuan Kwek Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise PPT quantum metrology entanglement |
| title | Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise |
| title_full | Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise |
| title_fullStr | Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise |
| title_full_unstemmed | Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise |
| title_short | Strategies for Positive Partial Transpose (PPT) States in Quantum Metrologies with Noise |
| title_sort | strategies for positive partial transpose ppt states in quantum metrologies with noise |
| topic | PPT quantum metrology entanglement |
| url | https://www.mdpi.com/1099-4300/23/6/685 |
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