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基本的物理定律是时间对称(time symmetric)的,为何我们担忧时光消逝?因为直观世界是时间对称的。 wayell.blog.163.com|基于5个网页 2. 时间对称的 空间的这种延展性表明,宇宙不是时间对称的(Time Symmetric)。展现这一事实的最简单的方法就是回到前先台球的例子中。
Time-SymmetricReversible computational models with discrete internal states are said to be time-symmetric, if they can go back and forth in time by applying the same transition function. The direction in time is adjusted by a weak transformation of the phase-space, that is, an involution. So,...
The present article proposes to re-examine the parity-of-reasoning or double-standard fallacy argument, which favours a time-symmetric Gold universe model over a cosmological arrow of time. There are two reasons for this re-examination. One is empirical: 1) the recent discovery of an expanding...
Synthetic non-conservative systems with parity-time (PT) symmetric gain-loss structures can exhibit unusual spontaneous symmetry breaking that accompanies spectral singularity. Recent studies on PT symmetry in optics and weakly interacting open quantum systems have revealed intriguing physical properties, yet...
nature materials Article https://doi.org/10.1038/s41563-023-01773-0 Parity–time-symmetricphotonictopological insulator Received: 24 June 2022 Accepted: 28 November 2023 Published online: 9 January 2024 Check for updates Alexander Fritzsche1,2, Tobias Biesenthal1, Lukas J. Maczewsky ...
This is a rather informal note, discussing a deterministic time symmetric (for black and white players) version of the classical game Go. The Ko and Komi rules are removed, and two other natural rules added. The main idea is somewhat inspired by quantum mechanics....
Time- symmetric quantum mechanics questioned and de- fended. Physics Today 2011; 64 (5): 62-63. http: //dx.doi.org/10.1063/1.3595150Aharonov, Y., Popescu, S. & Tollaksen, J. Time-symmetric quantum mechanics ques- tioned and defended. Physics Today 64, 62-63 (2011). URL http://...
by demonstrating a parity–time-symmetric topological insulator, we show that topological transport exists beyond these constraints. Implemented on a photonic platform, our non-Hermitian topological system harnesses the complex interplay between a discrete coupling protocol and judiciously placed losses and,...
Optomechanically-induced transparency (OMIT) and the associated slowing of light provide the basis for storing photons in nanoscale devices. Here we study OMIT in parity-time (PT)-symmetric microresonators with a tunable gain-to-loss ratio. This system features a sideband-reversed, non-amplifying tr...