التفاصيل البيبلوغرافية
| العنوان: |
Quasiprobability fluctuation theorem behind the spread of quantum information. |
| المؤلفون: |
Zhang, Kun, Wang, Jin |
| المصدر: |
Communications Physics; 3/12/2024, Vol. 7 Issue 1, p1-10, 10p |
| مصطلحات موضوعية: |
QUANTUM statistics, QUANTUM fluctuations, STOCHASTIC processes, QUANTUM computers, PROBABILITY theory, EVERYDAY life, MARKOV spectrum |
| الشركة/الكيان: |
INTERNATIONAL Business Machines Corp. |
| مستخلص: |
Information spreads in time. For example, correlations dissipate when the correlated system locally couples to a third party, such as the environment. This simple but important fact forms the known quantum data-processing inequality. Here we theoretically uncover the quantum fluctuation theorem behind the quantum informational inequality. The fluctuation theorem quantitatively predicts the statistics of the underlying stochastic quantum process. To fully capture the quantum nature, the fluctuation theorem established here is extended to the quasiprobability regime. We also experimentally apply an interference-based method to measure the amplitudes composing the quasiprobability and verify our established fluctuation theorem by the IBM quantum computer. With the increase of the use of quantum information in everyday life, its dynamics requires deeper understanding. Here, the quantum fluctuation theorem, that accounts for a quantum system interacting with the environment, is established within the framework of quasi-probability, a powerful tool for studying quantum statistics. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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