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06-29
2026
Recent Advances in Fast Graph Algorithms: Combinatorial Techniques for Path and Flow Problems
时 间：14:00-15:00, Jun 29, 2026 (Mon)地 点：RM 1-222, FIT Building内容：We will discuss recent algorithmic advances for fundamental graph problems, including negative-weight shortest paths, maximum flow, and minimum-cost flow. Classical textbook-style algorithms, such as Bellman-Ford and push-relabel, often lead to \(O(mn)\)-type running times. In recent years, however, there has been trem...
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06-12
2026
Ion-ion entanglement over a 50-km long fibre channel with a compact cavity-coupled quantum network node
时 间：10:30-12:00, Jun 12, 2026 (Fri)地 点：RM S327, MMW Building内容：Quantum networks promise transformative applications in secure communication, distributed quantum computing, sensing, and precision timekeeping. Realising real-world metropolitan-scale quantum networks requires compact, deployable systems capable of distributing entanglement over long distances beyond laboratory conditi...
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06-12
2026
Cosmos 3: Omnimodal World Models for Physical AI
时 间：10:00-11:00, Jun 12, 2026 (Fri)地 点：在线会议：https://meeting.tencent.com/dm/nDbunv9P6LYg内容：We introduce Cosmos 3, a family of omnimodal world models designed to jointly process and generate language, image, video, audio, and action sequences within a unified mixture-of-transformers architecture. By supporting highly flexible input-output configurations, Cosmos 3 seamlessly unif...
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06-12
2026
Programmable Quantum Simulator based on Two-Dimensional Trapped Ion Crystals
时 间：09:30-10:30, Jun 12, 2026 (Fri)地 点：RM S327, MMW Building内容：Trapped ions are a versatile platform for quantum simulation of spin models due to their good coherence properties, the possibility to induce variable-range spin-spin interactions as well as the ease of site-resolved single-particle control and readout. We make use of a modified design of a linear Paul trap, which allow...
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06-11
2026
Reconfigurable Dissipative Entanglement between Many Spin Ensembles: From Robust Quantum Sensing to Many-Body State Engineering （Online talk）
时 间：10:30-11:30, Jun 11, 2026 (Thu)地 点：线上报告 (腾讯会议：963-955-107)内容：An attractive approach for stabilizing entangled many-body spin states is to employ engineered dissipation. Most existing proposals either target relatively simple collective spin states or require numerous independent and complex dissipative processes. Here, we show a surprisingly versatile scheme [1] for ma...
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06-10
2026
Exponential Speed-ups for Structured Goemans-Williamson relaxations via Quantum Gibbs States and Pauli Sparsity
时 间：10:00-12:00, Jun 10, 2026 (Wed)地 点：RM S327, MMW Building内容：Quadratic Unconstrained Binary Optimization (QUBO) problems are prevalent in various applications and are known to be NP-hard. The seminal work of Goemans and Williamson introduced a semidefinite programming (SDP) relaxation for such problems, solvable in polynomial time that upper bounds the optimal value. Their approa...