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We prove that any element in a matroid can be removed, by either deletion or contraction, in such a way that no tangle "splits".

组合数学 · 数学 2025-12-12 Jim Geelen

In the theory of combinatorial algebras, there is a sequence of embeddings between Kleene's second model, van Oosten's model, and Scott's graph model. We prove that none of these embeddings can be reversed. We also prove nonembedding…

逻辑 · 数学 2026-05-15 Patrick Lutz , Paul Shafer , Sebastiaan A. Terwijn

We exploit the non-dissipative dynamics of a pair of electrons in a large square quantum dot to perform singlet-triplet spin measurement through a single charge detection and show how this may be used for entanglement swapping and…

Generic forms of the entangled states of two spin-1 (and spin-3/2) particles, along with the set of appropriate spin observables that together exhibit maximum nonlocality under the Hardy's nonlocality test are given; the maximum nonlocality…

量子物理 · 物理学 2015-08-25 Kaushik P. Seshadreesan , Sibasish Ghosh

The emergence of spinon quasiparticles, which carry spin but lack charge, is a hallmark of collective quantum phenomena in low-dimensional quantum spin systems. While the existence of spinons has been demonstrated through scattering…

We extend earlier examples provided by Schoen, Nori and Bloch to show that when a surface has the property that the kernel of its Albanese map is non-zero over the field of complex numbers, this kernel is non-zero over a field of…

代数几何 · 数学 2007-05-23 Mark Green , Philip A. Griffiths , Kapil Hari Paranjape

A generalized vector particle theory with the use of an extended set of Lorentz group irredicible representations, including scalar, two 4-vectors, and antisymmetric 2-rang tensor, is investigated. Initial equations depend upon four complex…

高能物理 - 理论 · 物理学 2007-05-23 V. V. Kisel , N. G. Tokarevskaya , A. A. Bogush , V. M. Red'kov

We give a simple proof of the no-ghost theorem in the critical bosonic string theory by using a similarity transformation.

高能物理 - 理论 · 物理学 2009-11-11 Kazuyuki Furuuchi , Nobuyoshi Ohta

We consider two interacting electrons in a semiconductor quantum dot structure which consists of a small dot within a larger dot, and demonstrate a singlet-triplet filtering mechanism which involves spin-dependent resonances and can…

介观与纳米尺度物理 · 物理学 2009-11-11 G. Giavaras , J. H. Jefferson , M. Fearn , C. J. Lambert

The no-cloning theorem prohibits the creation of identical copies of quantum information, imposing fundamental constraints on quantum technologies. A recently proposed protocol, encrypted cloning, introduced by Yamaguchi and Kempf, showed…

量子物理 · 物理学 2026-05-27 Zheng Liang Lim , Hoi-Kwong Lo

Incompatibility is a feature of quantum theory that sets it apart from classical theory, and the inability to clone an unknown quantum state is one of the most fundamental instances. The no-hiding theorem is another such instance that…

量子物理 · 物理学 2025-08-12 Matthew Girling , Cristina Cirstoiu , David Jennings

We consider a modified version of the coproduct for $\U(\su_q(2))$ and show that in the limit when $q \rightarrow 1$, there exists an essentially non-cocommutative coproduct. We study the implications of this non-cocommutativity for a…

q-alg · 数学 2009-10-30 L. C. Kwek , C. H. Oh , K. Singh

The transition from dimerized to uniform phases is studied in terms of spectral weights for spin chains using continuous unitary transformations (CUTs). The spectral weights in the S=1 channel are computed perturbatively around the limit of…

强关联电子 · 物理学 2009-11-07 Kai P. Schmidt , Götz S. Uhrig

We present a new topological proof of the infinitude of prime numbers with a new topology. Furthermore, in this topology, we characterize the infinitude of any non-empty subset of prime numbers.

数论 · 数学 2024-10-30 Jhixon Macías

We develop a unified approach to the problem of clustering in the three different fields of applications, as indicated in the title the paper. The approach is based on Khintchine's probabilistic method that grew out of the Darwin-Fawler…

概率论 · 数学 2007-06-13 Gregory Freiman , Boris Granovsky

Entanglement is the quintessential quantum phenomenon and a necessary ingredient in most emerging quantum technologies, including quantum repeaters, quantum information processing (QIP) and the strongest forms of quantum cryptography. Spin…

We provide a detailed proof of the validity of the Minimal Model Program for threefolds over excellent Dedekind separated schemes whose residue fields do not have characteristic 2 or 3.

代数几何 · 数学 2022-01-21 Lingyao Xie , Qingyuan Xue

The splitting principle states that morphisms in a derived category do not "split" accidentally. This has been successsfully applied in several characterizations of rational, DB, and other singularities. In this article I prove a general…

代数几何 · 数学 2011-08-09 Sándor J Kovács

We give an informal summary of ongoing work which uses tools distilled from the theory of fibre bundles to classify and connect invariant fields associated with spin motion in storage rings. We mention four major theorems. One ties…

加速器物理 · 物理学 2016-03-23 Klaus Heinemann , Desmond P. Barber , James A. Ellison , Mathias Vogt

We systematically obtain all linear models which propagate a totally symmetric rank-three field without parity violation on a flat background. Each such model is defined exclusively by its gauge symmetry, a necessary property of effective…

高能物理 - 理论 · 物理学 2025-06-30 Will Barker , Carlo Marzo , Alessandro Santoni