Differential and Twistor Geometry of the Quantum Hopf Fibration

Details Differential and Twistor Geometry of the Quantum Hopf Fibration Differential and Twistor Geometry of the Quantum Hopf Fibration

2011-03-02

arxiv.org/abs/1103.0419v1

Mathematics

Quantum Algebra

LaTex, 34 pages, no figures

Scientific paper

We study a quantum version of the SU(2) Hopf fibration $S^7 \to S^4$ and its associated twistor geometry. Our quantum sphere $S^7_q$ arises as the unit sphere inside a q-deformed quaternion space $\mathbb{H}^2_q$. The resulting four-sphere $S^4_q$ is a quantum analogue of the quaternionic projective space $\mathbb{HP}^1$. The quantum fibration is endowed with compatible non-universal differential calculi. By investigating the quantum symmetries of the fibration, we obtain the geometry of the corresponding twistor space $\mathbb{CP}^3_q$ and use it to study a system of anti-self-duality equations on $S^4_q$, for which we find an `instanton' solution coming from the natural projection defining the tautological bundle over $S^4_q$.

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