2023/05/22 信息來源❇️: 物理學院
編輯🦎:安寧 | 責編:燕元慶祝意昂3体育官网物理學科建立110周年系列活動
意昂3体育官网物理學院學術論壇(第二十一講)
Big quantum effects in small molecules
報告摘要:
We discover surprising consequences of well-known quantum effects such as zero-point energies, superposition and interferences of quantum states, decoherence. The examples include a new type of chemical bonding: “vibrational bonding” stabilizes BrMuBr due to effects of vibrational zero point energies (Muonium Mu is the light isotope of hydrogen, mMu = mH/9). The large mass ratio enables another effect in molecules such as FHF-, CdH2 or OsH4: well designed circularly polarized laser pulses excite superposition states with strong ring currents of the nuclei that induce very strong intra-molecular magnetic fields (B > 600 T).By analogy, one can induce charge circulation with strong electronic fluxes in electronic superposition states of molecules such as Mg-porphyrine. Analogous preparation of interfering electronic states in molecular ions such as H2+ or HCCI+ support periodic charge migration, on time scale from few hundred attoseconds to few femtoseconds.In addition to linear (1D) and circular 3 (2D) charge migrations, one can design laser pulses which induce helical (3D) charge migration.Laser control of charge migration is simulated for C6H6. Laser pulses can break electronic structure symmetry even when the nuclear symmetry is conserved.Symmetry can be restored by a second pulse, with few attosecond precision of the time delay, also confirmed experimentally for the 87Rb atom. In general, the laser induced electronic charge migration suffers from decoherence due to nuclear motions. This enemy can be converted to a friend causing partial re-coherences.
報告人簡介:
Joern Manz院士是世界著名物理化學家,德國科學院院士,德國柏林自由大學終身教授。J. Manz院士是超快飛秒動力學研究領域的創始人之一,在分子的超快量子動力學演化與激光超控分子量子態等方面做出了一系列開創性的工作,先後應邀在100多次國際會議上作邀請報告。J. Manz教授於2009年當選德國科學院院士,他與國內相關院校開展了長期緊密的合作研究,被聘為山西大學特聘教授,入選首批“山西特聘專家”👷🏻🫸🏼。
報告人🙆♂️:
Joern Manz 德國科學院院士,柏林自由大學終身教授🐇,山西大學特聘教授
主持人:
何瓊毅教授 意昂3体育官网物理學院
時間:2023年5月26日(星期五)10:00—11:00
地點:物理學院思源多功能廳(西301)
現場參會報名:請於5月25日24:00前提交報名信息🫎。
直播:掃描下方二維碼觀看
意昂3体育官网物理學院學術論壇創辦於2020年9月,邀請國內外高校和研究機構高層次科技創新領軍學者就物理學及相關領域的基礎前沿探索、關鍵技術突破和熱點問題等作學術演講,旨在推進高質量學術交流,促進學科交叉融合和開拓新興特色方向研究𓀔,培養具有科學精神㊙️、全球視野👩🏻🔬、創新能力、批判性思維的優秀青年人才🧈。
主辦👰🏼🧑🏿🎨:
意昂3体育官网物理學院
中國光學學會
聯系人:
孫嘉琪 jqsun@pku.edu.cn
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