Events

Year All

  • Tuesday,25,08,2026
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  • Seminar

“Modulated SPT in 1D: Classification, Crystalline Equivalent Principle and LSM constraints” by Dr. Shang-Qiang NING on Tuesday, August 25, 2026, 4:00pm CYMP522, HKU

Topological phases of matter can be protected not only by on-site symmetries, but also by crystalline symmetries. In this talk, I will present the classification of 1D symmetry-protected topological (SPT) phases protected by both on-site and crystalline symmetries—referred to as modulated SPT phases—and show how it aligns with the crystalline equivalence principle through the MPS formalism. Furthermore, I will discuss their applications to Lieb–Schultz–Mattis (LSM) constraints and non-invertible symmetries.

Dr. Shang-Qiang NING

  • Tuesday,04,08,2026
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  • Seminar

“The Bottleneck Isn’t Physics — It’s Ethernet: Deploying Relativistic ZKP for Identity Verification” by Dr. Yao Ma on Tuesday, August 4, 2026, 3:00pm CYMP522, HKU

Relativistic zero-knowledge proofs (RZKP) exploit the no-superluminal principle between spatially separated provers, offering a use case of phishing-proof identity verification — but prior demonstrations required 60 meters of separation, and soundness against entangled provers remained open. In this paper (https://arxiv.org/abs/2507.14324), we address both. From an engineering perspective, we push the entire challenge-response path onto FPGAs and account for latency transceiver-by-transceiver, cutting the round-trip window to 100 ns and halving the required separation to 30 meters. These techniques are protocol-agnostic and transfer to any relativistic protocol. Deploying across two rooms of a working office building, we scale to six million rounds and provide the first phase-by-phase timing decomposition of an RZKP implementation. The bottleneck is not the physics. It is network packet processing during verification — isolated by a single-verifier three-prover variant that eliminates inter-verifier communication. On the theory side, we prove the entangled-soundness bound for a two-prover graph-coloring RZKP, via a modified protocol and a reduction through almost-commuting operator assignments. The bound is real, but loose: |E|⁸ scaling, against the |E|⁴ of the known three-prover result. We identify exactly where each penalty is paid, offering the reduction chain as a reusable template for lifting classical soundness proofs — and a map of its costs.

Dr. Yao Ma

  • Tuesday,14,07,2026
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  • Conference

2026 Joint Annual Conference of Physical Societies in the Guangdong-Hong Kong-Macao Greater Bay Area, July 14 to July 17, 2026, HKU

The HK Institute of Quantum Science & Technology is proud to be a co-organizer of the upcoming 2026 Joint Annual Conference of Physical Societies in the Guangdong-Hong Kong-Macao Greater Bay Area, which will be held at the University of Hong Kong (HKU) from July 14 to July 17, 2026. The conference will be held at Rayson Huang Theatre, Main Campus, The University of Hong Kong (HKU). This premier regional forum brings together physics professionals, researchers, students, and industry experts across Hong Kong, Guangdong, and Macau to engage in thematic discussions, share cutting-edge research, and foster collaboration within the physics community. The conference aims to strengthen regional academic ties and promote innovative exchanges that will advance the field of physics and related sciences. The event is organized in partnership with the Physical Society of Hong Kong, Guangdong Physics Society, The Physical Society of Macau, the Quantum Science Centre of Guangdong-Hong Kong-Macao Greater Bay Area, and Qebula Mind Limited. The conference will cover a broad range of key topics, including: • Atomic, Molecular, Optical, and Quantum Physics • Condensed Matter and Statistical Physics • Materials Physics and Engineering • Biophysics and Soft Matter • Astrophysics and Astronomy • Scattering, Particle, Nuclear, and Plasma Physics • Interdisciplinary and Applied Physics • Physics Education We invite all interested parties to participate in this exciting gathering and look forward to welcoming the global physics community to Hong Kong for this outstanding event. For more details and to participate, please refer to the official poster and event information at YGA 2026 Website.