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2025诺贝尔物理学奖揭晓
Zhong Guo Xin Wen Wang· 2025-10-07 10:17
Core Points - The 2025 Nobel Prize in Physics was awarded to scientists John Clarke, Mike H. Devorett, and John M. Martini for their discovery of the macroscopic quantum tunneling effect and energy quantization in circuits [1] Group 1: Nobel Prize Winners - The Nobel Prize in Physics has recognized various scientists over the years, with notable contributions from Chinese scientists such as Yang Chen-Ning and Li Zhengdao, who won in 1957 for their groundbreaking work on parity conservation [5] - Other significant winners include Ding Zhaozhong in 1976 for discovering the J/ψ particle, and Gao Kun in 2009 for his contributions to optical communication [5] Group 2: Notable Absentees - Several influential physicists, such as Stephen Hawking, have not received the Nobel Prize despite their significant contributions, primarily due to the lack of experimental verification of their theories [9] - Wu Jianxiong, known for her experimental validation of the parity non-conservation theory, is often cited as a notable omission from the list of Nobel laureates [9] Group 3: Recent Winners - The past decade of Nobel Prize winners reflects the forefront of contemporary physics, with awards given for advancements in machine learning, attosecond light pulses, and quantum information science [10][11][12]
新研究发布宇宙天体“衰亡”时间表
Ke Ji Ri Bao· 2025-05-15 01:09
Core Insights - A new study from Radboud University reveals that the last batch of stars in the universe will completely "fade away" in 1,078 years, significantly shorter than the previous estimate of 101,100 years [1][2] - The research is based on Hawking radiation, a revolutionary theory proposed by Stephen Hawking in the 1970s, which suggests that black holes emit radiation and are not just "consuming" entities [1] - The study has been published in the latest issue of the journal "Cosmology and Astroparticle Physics" [1] Summary by Categories Research Findings - The study indicates that white dwarfs will evaporate in 1,078 years when considering Hawking-like radiation effects, a drastic reduction from the earlier estimate of 101,100 years [1] - Neutron stars and stellar black holes have the same evaporation time of 10^67 years, which was unexpected as black holes are generally thought to evaporate faster due to their stronger gravity [2] - The research team explains that black holes have no surface, allowing some radiation to be reabsorbed, which slows down the Hawking radiation process, while neutron stars have a solid surface that allows radiation to escape more efficiently [2] Additional Calculations - The team calculated the evaporation timelines for various cosmic bodies: the Moon will take approximately 3×10^89 years, supermassive black holes will take 10^96 years, interstellar clouds will take 10^127 years, and dark matter halos of superclusters will take 10^135 years [2]