邀请人 (Invited by): 王凯

时间 (Time): 星期一，2023/6/12-16:00-18:00

地点 (Location): 珠海校区天琴中心2317会议室

摘要 (Abstract): 

Violations of the eigenstate thermalization hypothesis in strongly correlated quantum systems are rare but quite important due to their potential application demand in quantum information. Among them, the quantum many-body scar (QMBS) state is a recently discovered form of weak ergodic violation, which is expected to provide an opportunity to counteract the quantum decoherence caused by the thermalization of the quantum many-body effect. However, conventional QMBS states are based on constrained models. So, could similar phenomena appear in a wider range of quantum many-body systems? To answer this question, we propose a new class of QMBS states based on the dynamically free Bose-Hubbard model in arbitrary dimensions. From the viewpoint of Hilbert space, this state is located in a high-dimensional hypercube subspace weakly connected to the rest of the Hilbert space. Furthermore, this kind of state has been observed in superconducting processors. Our research broadens the scar mechanism. Additionally, by improving the coherence time of QMBS states, it has been found that they possess properties such as multipartite entanglement, which is important in quantum metrology.

主讲人简介 (Speaker's CV): 

应磊，现任浙江大学百人计划研究员，博导。2020年加入浙江大学物理学院。之前在美国威斯康辛大学-麦迪逊从事博士后研究，2016年博士毕业于美国亚利桑那州立大学。应磊研究员从事量子物理，尤其是量子多体物理中的新奇现象研究。发表近30篇文章，其中包括Nat. Phys., Phys. Rev. Lett., Optica, Nat. Comm.等。