Results 21 to 30 of about 12,383,450 (356)

On the form factor for the unitary group [PDF]

open access: yesJournal of Mathematical Physics, 2004
We study the combinatorics of the contributions to the form factor of the group U(N) in the large N limit. This relates to questions about semiclassical contributions to the form factor of quantum systems described by the unitary ensemble.
DEGLI ESPOSTI, MIRKO, A. Knauf
openaire   +4 more sources

On the cohomology of compact unitary group Shimura varieties at ramified split places [PDF]

open access: yes, 2011
In this article, we prove results about the cohomology of compact unitary group Shimura varieties at split places. In nonendoscopic cases, we are able to give a full description of the cohomology, after restricting to integral Hecke operators at p on the
P. Scholze, S. Shin
semanticscholar   +1 more source

Automatic continuity for the unitary group [PDF]

open access: yes, 2011
We show that every homomorphism from the infinite-dimensional unitary or orthogonal group to a separable group is continuous.
T. Tsankov
semanticscholar   +1 more source

Unitary groups and commutators [PDF]

open access: yesProceedings of the American Mathematical Society, 1972
If H is a possibly unbounded selfadjoint operator and A is a closed operator in a Hilbert space, the relation ( U t − 1 A U t f ) ′ = i U t
openaire   +1 more source

On Shimura varieties for unitary groups [PDF]

open access: yesPure and Applied Mathematics Quarterly, 2021
This is a largely expository article based on our previous work on arithmetic diagonal cycles on unitary Shimura varieties. We define a class of Shimura varieties closely related to unitary groups which represent a moduli problem of abelian varieties with additional structure, and which admit interesting algebraic cycles.
Rapoport, M, Smithling, B, Zhang, W
openaire   +3 more sources

Units in $F_{2^k}D_{2n}$ [PDF]

open access: yesInternational Journal of Group Theory, 2014
Let $F_q D_{2n}$ be the group algebra of $D_{2n}$, the dihedral group of order $2n$ over $F_q=GF(q)$. In this paper, we establish the structure of $U(F_{2^k}D_{2n})$, the unit group of $F_{2^k}D_{2n}$ and that of its normalized unitary subgroup $V_*(F_{2^
Neha Makhijani   +2 more
doaj  

Braiding quantum gates from partition algebras [PDF]

open access: yesQuantum, 2020
Unitary braiding operators can be used as robust entangling quantum gates. We introduce a solution-generating technique to solve the $(d,m,l)$-generalized Yang-Baxter equation, for $m/2\leq l \leq m$, which allows to systematically construct such ...
Pramod Padmanabhan   +2 more
doaj   +1 more source

Covariant catalysis requires correlations and good quantum reference frames degrade little [PDF]

open access: yesQuantum, 2023
Catalysts are quantum systems that open up dynamical pathways between quantum states which are otherwise inaccessible under a given set of operational restrictions while, at the same time, they do not change their quantum state.
Lauritz van Luijk   +2 more
doaj   +1 more source

Rate of convergence of linear functions on the unitary group [PDF]

open access: yes, 2010
We study the rate of convergence to a normal random variable of the real and imaginary parts of , where U is an N × N random unitary matrix and AN is a deterministic complex matrix.
Jon P Keating, F. Mezzadri, B. Singphu
semanticscholar   +1 more source

Unitary Easy Quantum Groups: the free case and the group case [PDF]

open access: yes, 2015
Easy quantum groups have been studied intensively since the time they were introduced by Banica and Speicher in 2009. They arise as a subclass of ($C^*$-algebraic) compact matrix quantum groups in the sense of Woronowicz.
Pierre Tarrago, Moritz Weber
semanticscholar   +1 more source

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