{"total":10,"items":[{"citing_arxiv_id":"2605.06985","ref_index":47,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Real-Time Quantum Dynamics on the Fuzzy Sphere: Chaos and Entanglement","primary_cat":"hep-th","submitted_at":"2026-05-07T22:04:15+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"In this fuzzy-sphere matrix model the largest Lyapunov exponent drops to zero at finite temperature, respecting the Maldacena-Shenker-Stanford bound while entanglement shows fast scrambling.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"duction to the extensive literature) entanglement in a quantum system is a notion that has been developed to understand and quantify how the quantum information associated to the degrees of freedom become \"scrambled\" and most frequently characterized or measured by the entanglement entropy . To compute the latter, it is sufficient (but not necessary in gen- eral [47]) that the Hilbert spaceHof the system can be decomposed as a direct product of two sub-Hilbert spacesH A andH B asH=H A ⊗ HB, i.e. the system has a bipartite com- position [33, 48]. It is understood that this separation is in general not unique and another decomposition will yield, in general a different entanglement entropy as may be naturally expected."},{"citing_arxiv_id":"2604.22745","ref_index":47,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Carrollian quantum states and flat space holography","primary_cat":"hep-th","submitted_at":"2026-04-24T17:43:52+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"One could also quantize this theory using canonical quantization. In that case one does not find a distinguished vacuum vector, which agrees with the statement [39] that the vacuum is not normalizable. Let us emphasize that this is nothing unusual and for theories with zero modes or theories on time-dependent spacetimes the typical situation as is discussed, e.g., in [47]. We will now argue that(3.37) is a well-defined state. Recalling thatW0(f)depends only on the equivalence class,W0(f +g) =W0(f)for g∈kerσ0, one notices that this map is - 15 - well-defined because of the form ofkerσ0 given in(2.26). This map can be linearly extended to the Weyl algebra to define a linear functional that is normalised (ω0(W0(0)) = 1), and"},{"citing_arxiv_id":"2604.19861","ref_index":10,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Excitability in quantum field theory","primary_cat":"hep-th","submitted_at":"2026-04-21T18:00:00+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"For zero-mean Gaussian states in generalized free field theories, one-way local excitability always implies two-way excitability, generalizing the quasiequivalence theorems of Powers, Stormer, van Daele, Araki, and Yamagami.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2603.25990","ref_index":49,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Implication of dressed form of relational observable on von Neumann algebra","primary_cat":"hep-th","submitted_at":"2026-03-27T00:29:08+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":4.0,"formal_verification":"none","one_line_summary":"Dressed relational observables imply quasi-de Sitter space corresponds to Type II_∞ von Neumann algebra with diverging trace in the gravity decoupling limit, unlike the finite-trace Type II_1 algebra for de Sitter space.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2512.10101","ref_index":9,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"The von Neumann algebraic quantum group $\\mathrm{SU}_q(1,1)\\rtimes \\mathbb{Z}_2$ and the DSSYK model","primary_cat":"math-ph","submitted_at":"2025-12-10T21:46:07+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":8.0,"formal_verification":"none","one_line_summary":"The DSSYK model emerges as the dynamics on the quantum homogeneous space of the von Neumann algebraic quantum group SU_q(1,1) ⋊ Z2.","context_count":1,"top_context_role":"background","top_context_polarity":"background","context_text":"through coordinatesθ∈[0,2π),ψ∈[−2π,2π) andρ≥0. That is, these coordinates define a one-to-one parametrisation of the group elements in SU(1,1) (2.1) given by [80] g(θ, ρ, ψ) :=e i θ 2 H e ρ 2 (E+F) ei ψ 2 H = \" ei θ+ψ 2 cosh ρ 2 ei θ−ψ 2 sinh ρ 2 ei ψ−θ 2 sinh ρ 2 e−i θ+ψ 2 cosh ρ 2 # .(2.14) Through this parametrisation, any functionf: SU(1,1)→Cis equivalent to a function f: [0,2π)×[0,∞)×[−2π,2π)→Cgiven byf(θ, ρ, ψ) :=f(g(θ, ρ, ψ)). The Haar measure, - 9 - and therefore the inner product on these functions, can then also be expressed in terms of this parametrisation by [80] ⟨f, k⟩ := Z SU(1,1) dµ(g)f(g)k(g) = Z 2π 0 dθ 2π Z 2π −2π dψ 4π Z ∞ 0 dρsinhρ f(θ, ρ, ψ)k(θ, ρ, ψ), (2.15) which is defined up to a normalisation factor. Equation (2.10) now defines an action of the universal enveloping algebraUon an appropriate dense subspace of the square-integrable functions. For example, for the Cartan elementH, it can be readily verified that"},{"citing_arxiv_id":"2510.20902","ref_index":38,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Searching for emergent spacetime in spin glasses","primary_cat":"hep-th","submitted_at":"2025-10-23T18:00:41+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":6.0,"formal_verification":"none","one_line_summary":"Spectral functions of SYK, p-spin, and SU(M) Heisenberg models show exponential tails in spin-glass phases and quasiparticle families in spin-liquid phases, with a proof that exponential decay blocks detection of bulk causal structure.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2509.02539","ref_index":1,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Extending the Dynamical Systems Toolkit: Coupled Fields in Multiscalar Dark Energy","primary_cat":"hep-th","submitted_at":"2025-09-02T17:41:58+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":7.0,"formal_verification":"none","one_line_summary":"New dynamical systems variables for coupled axion-saxion fields yield a general non-geodesicity expression at fixed points and identify genuinely non-geodesic attractors under exponential couplings.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2502.08494","ref_index":45,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"All Hilbert spaces are the same: consequences for generalized coordinates and momenta","primary_cat":"quant-ph","submitted_at":"2025-02-12T15:29:41+00:00","verdict":"UNVERDICTED","verdict_confidence":"LOW","novelty_score":5.0,"formal_verification":"none","one_line_summary":"All separable Hilbert spaces of given dimension being isomorphic implies exactly six basic generalized coordinate operators and seven coordinate-momentum pairs via self-adjoint or Neumark extensions.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2403.09021","ref_index":67,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"Von Neumann Algebras in Double-Scaled SYK","primary_cat":"hep-th","submitted_at":"2024-03-14T01:02:28+00:00","verdict":null,"verdict_confidence":null,"novelty_score":null,"formal_verification":null,"one_line_summary":null,"context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null},{"citing_arxiv_id":"2206.10780","ref_index":37,"ref_count":1,"confidence":0.9,"is_internal_anchor":false,"paper_title":"An Algebra of Observables for de Sitter Space","primary_cat":"hep-th","submitted_at":"2022-06-22T00:22:20+00:00","verdict":"ACCEPT","verdict_confidence":"MODERATE","novelty_score":7.0,"formal_verification":"none","one_line_summary":"Defines a Type II₁ algebra of gravitationally dressed observables in de Sitter static patch whose entropy matches generalized entropy up to a state-independent additive constant.","context_count":0,"top_context_role":null,"top_context_polarity":null,"context_text":null}],"limit":50,"offset":0}