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Anomaly-free symmetries with obstructions to gauging and onsiteability
Wilbur Shirley, Carolyn Zhang, Wenjie Ji, Michael Levin
https://arxiv.org/abs/2507.21267 https://

Anomaly-free symmetries with obstructions to gauging and onsiteability
We present counterexamples to the lore that symmetries that cannot be gauged or made on-site are necessarily anomalous. Specifically, we construct unitary, internal symmetries of two-dimensional lattice models that cannot be consistently coupled to background or dynamical gauge fields or disentangled to a tensor product of on-site operators. These symmetries are nevertheless anomaly-free in the sense that they admit symmetric, gapped Hamiltonians with unique, invertible ground states. We show t…

DELIVER: A System for LLM-Guided Coordinated Multi-Robot Pickup and Delivery using Voronoi-Based Relay Planning
Alkesh K. Srivastava, Jared Michael Levin, Alexander Derrico, Philip Dames
https://arxiv.org/abs/2508.19114

DELIVER: A System for LLM-Guided Coordinated Multi-Robot Pickup and Delivery using Voronoi-Based Relay Planning
We present DELIVER (Directed Execution of Language-instructed Item Via Engineered Relay), a fully integrated framework for cooperative multi-robot pickup and delivery driven by natural language commands. DELIVER unifies natural language understanding, spatial decomposition, relay planning, and motion execution to enable scalable, collision-free coordination in real-world settings. Given a spoken or written instruction, a lightweight instance of LLaMA3 interprets the command to extract pickup an…

Open Questions about Time and Self-reference in Living Systems
Samson Abramsky, Wolfgang Banzhaf, Leo S. D. Caves, Michael Levin, Penousal Machado, Charles Ofria, Susan Stepney, Roger White
https://arxiv.org/abs/2508.11423

Open Questions about Time and Self-reference in Living Systems
Living systems exhibit a range of fundamental characteristics: they are active, self-referential, self-modifying systems. This paper explores how these characteristics create challenges for conventional scientific approaches and why they require new theoretical and formal frameworks. We introduce a distinction between 'natural time', the continuing present of physical processes, and 'representational time', with its framework of past, present and future that emerges with life itself. Representa…

Replaced article(s) found for q-bio.BM. https://arxiv.org/list/q-bio.BM/new
[1/1]:
- What Lives? A meta-analysis of diverse opinions on the definition of life
Reed Bender, Karina Kofman, Blaise Ag\"uera y Arcas, Michael Levin

Probing Cosmic Ray Composition and Muon-philic Dark Matter via Muon Tomography
Cheng-en Liu, Rongfeng Zhang, Zijian Wang, Andrew Michael Levin, Leyun Gao, Jinning Li, Minxiao Fan, Youpeng Wu, Qite Li, Chen Zhou, Qiang Li
https://arxiv.org/abs/2507.23458

Probing Cosmic Ray Composition and Muon-philic Dark Matter via Muon Tomography
This work presents a novel cosmic-ray scattering experiment employing a Resistive Plate Chambers (RPC) muon tomography system. By introducing the scattering angle between incident and outgoing cosmic-ray tracks as a key observable, this approach enables simultaneous studies of secondary cosmic-ray composition and searching for new physics. During a 63-day campaign, 1.18 million cosmic ray scattering events were recorded and analyzed. By performing combined template fits to the observed angular …

Bulk Excitations of Invertible Phases
Wenjie Ji, David T. Stephen, Michael Levin, Xie Chen
https://arxiv.org/abs/2506.11288 https://a…

Bulk Excitations of Invertible Phases
Recent developments in the study of topological defects highlight the importance of understanding the multi-dimensional structure of bulk excitations inside a quantum system. When the bulk ground state is trivial, i.e. a product state, excitations on top of it are decoupled from each other and correspond to lower-dimensional phases and their defects within. In this paper, we expand the discussion to invertible phases and study the bulk excitations in, for example, SPT phases, Majorana chains, p…

Replaced article(s) found for q-bio.OT. https://arxiv.org/list/q-bio.OT/new
[1/1]:
- What Lives? A meta-analysis of diverse opinions on the definition of life
Reed Bender, Karina Kofman, Blaise Ag\"uera y Arcas, Michael Levin

Replaced article(s) found for q-bio.CB. https://arxiv.org/list/q-bio.CB/new
[1/1]:
- What Lives? A meta-analysis of diverse opinions on the definition of life
Reed Bender, Karina Kofman, Blaise Ag\"uera y Arcas, Michael Levin

Replaced article(s) found for q-bio.SC. https://arxiv.org/list/q-bio.SC/new
[1/1]:
- What Lives? A meta-analysis of diverse opinions on the definition of life
Reed Bender, Karina Kofman, Blaise Ag\"uera y Arcas, Michael Levin