期刊
SCIENTIFIC REPORTS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-019-40765-6
关键词
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资金
- U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division
- Swiss National Foundation via the National Centre of Competence in Research in Quantum Science and Technology (NCCR QSIT)
- RFBR [17-02-00396A, 18-02-00642A]
- Ministry of the Education and Science of the Russian Federation [16.7162.2017/8.9]
- Government of the Russian Federation [05.Y09.21.0018]
- Foundation for the Advancement of Theoretical Physics BASIS
- Pauli Center for Theoretical Physics
Uncovering the origin of the arrow of time remains a fundamental scientific challenge. Within the framework of statistical physics, this problem was inextricably associated with the Second Law of Thermodynamics, which declares that entropy growth proceeds from the system's entanglement with the environment. This poses a question of whether it is possible to develop protocols for circumventing the irreversibility of time and if so to practically implement these protocols. Here we show that, while in nature the complex conjugation needed for time reversal may appear exponentially improbable, one can design a quantum algorithm that includes complex conjugation and thus reverses a given quantum state. Using this algorithm on an IBM quantum computer enables us to experimentally demonstrate a backward time dynamics for an electron scattered on a two-level impurity.
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