{"title":"$$p$$ -Adic Welch Bounds and $$p$$ -Adic Zauner Conjecture","authors":"K. M. Krishna","doi":"10.1134/s207004662403004x","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p> Let <span>\\(p\\)</span> be a prime. For <span>\\(d\\in \\mathbb{N}\\)</span>, let <span>\\(\\mathbb{Q}_p^d\\)</span> be the standard <span>\\(d\\)</span>-dimensional p-adic Hilbert space. Let <span>\\(m \\in \\mathbb{N}\\)</span> and <span>\\(\\text{Sym}^m(\\mathbb{Q}_p^d)\\)</span> be the <span>\\(p\\)</span>-adic Hilbert space of symmetric m-tensors. We prove the following result. Let <span>\\(\\{\\tau_j\\}_{j=1}^n\\)</span> be a collection in <span>\\(\\mathbb{Q}_p^d\\)</span> satisfying (i) <span>\\(\\langle \\tau_j, \\tau_j\\rangle =1\\)</span> for all <span>\\(1\\leq j \\leq n\\)</span> and (ii) there exists <span>\\(b \\in \\mathbb{Q}_p\\)</span> satisfying <span>\\(\\sum_{j=1}^{n}\\langle x, \\tau_j\\rangle \\tau_j =bx\\)</span> for all <span>\\( x \\in \\mathbb{Q}^d_p.\\)</span> Then </p><span>$$\\begin{aligned} \\, \\max_{1\\leq j,k \\leq n, j \\neq k}\\{|n|, |\\langle \\tau_j, \\tau_k\\rangle|^{2m} \\}\\geq \\frac{|n|^2}{\\left|{d+m-1 \\choose m}\\right| }. \\end{aligned}$$</span>(0.1)<p> We call Inequality (0.1) as the <span>\\(p\\)</span>-adic version of Welch bounds obtained by Welch [<i>IEEE Transactions on Information Theory, 1974</i>]. Inequality (0.1) differs from the non-Archimedean Welch bound obtained recently by M. Krishna as one can not derive one from another. We formulate <span>\\(p\\)</span>-adic Zauner conjecture. </p>","PeriodicalId":44654,"journal":{"name":"P-Adic Numbers Ultrametric Analysis and Applications","volume":"7 1","pages":""},"PeriodicalIF":0.5000,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"P-Adic Numbers Ultrametric Analysis and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s207004662403004x","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
Let \(p\) be a prime. For \(d\in \mathbb{N}\), let \(\mathbb{Q}_p^d\) be the standard \(d\)-dimensional p-adic Hilbert space. Let \(m \in \mathbb{N}\) and \(\text{Sym}^m(\mathbb{Q}_p^d)\) be the \(p\)-adic Hilbert space of symmetric m-tensors. We prove the following result. Let \(\{\tau_j\}_{j=1}^n\) be a collection in \(\mathbb{Q}_p^d\) satisfying (i) \(\langle \tau_j, \tau_j\rangle =1\) for all \(1\leq j \leq n\) and (ii) there exists \(b \in \mathbb{Q}_p\) satisfying \(\sum_{j=1}^{n}\langle x, \tau_j\rangle \tau_j =bx\) for all \( x \in \mathbb{Q}^d_p.\) Then
We call Inequality (0.1) as the \(p\)-adic version of Welch bounds obtained by Welch [IEEE Transactions on Information Theory, 1974]. Inequality (0.1) differs from the non-Archimedean Welch bound obtained recently by M. Krishna as one can not derive one from another. We formulate \(p\)-adic Zauner conjecture.
期刊介绍:
This is a new international interdisciplinary journal which contains original articles, short communications, and reviews on progress in various areas of pure and applied mathematics related with p-adic, adelic and ultrametric methods, including: mathematical physics, quantum theory, string theory, cosmology, nanoscience, life sciences; mathematical analysis, number theory, algebraic geometry, non-Archimedean and non-commutative geometry, theory of finite fields and rings, representation theory, functional analysis and graph theory; classical and quantum information, computer science, cryptography, image analysis, cognitive models, neural networks and bioinformatics; complex systems, dynamical systems, stochastic processes, hierarchy structures, modeling, control theory, economics and sociology; mesoscopic and nano systems, disordered and chaotic systems, spin glasses, macromolecules, molecular dynamics, biopolymers, genomics and biology; and other related fields.