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Standard form of braided tensor product Krajczok, Jacek
Description
Whenever locally compact group acts on von Neumann algebras $M,N$, it gives rise to a canonical "diagonal" action on their tensor product $M\overline{\otimes}N$. This is no longer true, if we consider actions of locally compact quantum groups. Nonetheless, not all is lost. If the quantum group acting on von Neumann algebras $M,N$ is quasi-triangular (i.e. it is equipped with an $\operatorname{R}$-matrix), then one can form a twisted version of tensor product, called the braided tensor product $M\overline{\boxtimes}N$. This is a new von Neumann algebra which contains $M,N$ as subalgebras and which carries a canonical action of $\mathbb{G}$. As a special case, $\mathbb{G}$ can be taken to be the Drinfeld double of some (quantum) group $\mathbb{H}$, then action of $\mathbb{G}=D(\mathbb{H})$ on $M,N$ amounts to a pair of actions of $\mathbb{H}$ and its dual quantum group $\widehat{\mathbb{H}}$, satisfying Yetter-Drinfeld condition. I will discuss the construction of $M\overline{\boxtimes}N$, some examples and properties. Later, I will discuss results concerning the standard form of $M\overline{\boxtimes} N$. This talk is based on a joint work with Kenny De Commer.
Item Metadata
| Title |
Standard form of braided tensor product
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| Creator | |
| Publisher |
Banff International Research Station for Mathematical Innovation and Discovery
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| Date Issued |
2025-12-05
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| Description |
Whenever locally compact group acts on von Neumann algebras $M,N$, it gives rise to a canonical "diagonal" action on their tensor product $M\overline{\otimes}N$. This is no longer true, if we consider actions of locally compact quantum groups. Nonetheless, not all is lost. If the quantum group acting on von Neumann algebras $M,N$ is quasi-triangular (i.e. it is equipped with an $\operatorname{R}$-matrix), then one can form a twisted version of tensor product, called the braided tensor product $M\overline{\boxtimes}N$. This is a new von Neumann algebra which contains $M,N$ as subalgebras and which carries a canonical action of $\mathbb{G}$. As a special case, $\mathbb{G}$ can be taken to be the Drinfeld double of some (quantum) group $\mathbb{H}$, then action of $\mathbb{G}=D(\mathbb{H})$ on $M,N$ amounts to a pair of actions of $\mathbb{H}$ and its dual quantum group $\widehat{\mathbb{H}}$, satisfying Yetter-Drinfeld condition. I will discuss the construction of $M\overline{\boxtimes}N$, some examples and properties. Later, I will discuss results concerning the standard form of $M\overline{\boxtimes} N$. This talk is based on a joint work with Kenny De Commer.
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| Extent |
31.0 minutes
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| Subject | |
| Type | |
| File Format |
video/mp4
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| Language |
eng
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| Notes |
Author affiliation: Vrije Universiteit Brussel
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| Series | |
| Date Available |
2025-12-08
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| Provider |
Vancouver : University of British Columbia Library
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| Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
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| DOI |
10.14288/1.0450958
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| URI | |
| Affiliation | |
| Peer Review Status |
Unreviewed
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| Scholarly Level |
Postdoctoral
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| Rights URI | |
| Aggregated Source Repository |
DSpace
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Rights
Attribution-NonCommercial-NoDerivatives 4.0 International