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quant-ph2018
Maxwell-Sylvester Multipoles and the Geometric Theory of Irreducible Tensor Operators of Quantum Spin Systems
Patrick Bruno
A geometric theory of the irreducible tensor operators of quantum spin systems. It is based upon the Maxwell-Sylvester geometric representation of the multipolar electrostatic pote…
quant-ph2012★ 144 cited
Comment on "Quantum Time Crystals": a new paradigm or just another proposal of perpetuum mobile?
Patrick Bruno
A Comment on Frank Wilczek's paper "Quantum Time Crystals" (Phys. Rev. Lett. 109, 160401 (2012); arXiv:1202.2539).