## Duality of Gaudin Models

thesis

posted on 29.07.2020 by Filipp Uvarov#### thesis

In order to distinguish essays and pre-prints from academic theses, we have a separate category. These are often much longer text based documents than a paper.

We consider actions of the current Lie algebras $\gl_{n}[t]$ and $\gl_{k}[t]$ on the space $\mathfrak{P}_{kn}$ of polynomials in $kn$ anticommuting variables. The actions depend on parameters $\bar{z}=(z_{1}\lc z_{k})$ and $\bar{\alpha}=(\alpha_{1}\lc\alpha_{n})$, respectively.

We show that the images of the Bethe algebras $\mathcal{B}_{\bar{\alpha}}^{\langle n \rangle}\subset U(\gl_{n}[t])$ and $\mathcal{B}_{\bar{z}}^{\langle k \rangle}\subset U(\gl_{k}[t])$ under these actions coincide.

To prove the statement, we use the Bethe ansatz description of eigenvectors of the Bethe algebras via spaces of quasi-exponentials. We establish an explicit correspondence between the spaces of quasi-exponentials describing eigenvectors of $\mathcal{B}_{\bar{\alpha}}^{\langle n \rangle}$ and the spaces of quasi-exponentials describing eigenvectors of $\mathcal{B}_{\bar{z}}^{\langle k \rangle}$.

One particular aspect of the duality of the Bethe algebras is that the Gaudin Hamiltonians exchange with the Dynamical Hamiltonians. We study a similar relation between the trigonometric Gaudin and Dynamical Hamiltonians. In trigonometric Gaudin model, spaces of quasi-exponentials are replaced by spaces of quasi-polynomials. We establish an explicit correspondence between the spaces of quasi-polynomials describing eigenvectors of the trigonometric Gaudin Hamiltonians and the spaces of quasi-exponentials describing eigenvectors of the trigonometric Dynamical Hamiltonians.

We also establish the $(\gl_{k},\gl_{n})$-duality for the rational, trigonometric and difference versions of Knizhnik-Zamolodchikov and Dynamical equations.

### Categories

- Algebraic Structures in Mathematical Physics
- Mathematical Aspects of Quantum and Conformal Field Theory, Quantum Gravity and String Theory
- Mathematical Aspects of Classical Mechanics, Quantum Mechanics and Quantum Information Theory
- Mathematical Physics not elsewhere classified
- Pure Mathematics not elsewhere classified

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### History

#### Degree Type

Doctor of Philosophy#### Department

Mathematics#### Campus location

Indianapolis#### Advisor/Supervisor/Committee Chair

Vitaly Tarasov#### Additional Committee Member 2

Evgeny Mukhin#### Additional Committee Member 3

Alexander Its#### Additional Committee Member 4

Daniel Ramras### Licence

### Exports

### Categories

- Algebraic Structures in Mathematical Physics
- Mathematical Aspects of Quantum and Conformal Field Theory, Quantum Gravity and String Theory
- Mathematical Aspects of Classical Mechanics, Quantum Mechanics and Quantum Information Theory
- Mathematical Physics not elsewhere classified
- Pure Mathematics not elsewhere classified