1212.1528 (Bogdan Damski)

Fidelity susceptibility of the quantum Ising model in the transverse
field: The exact solution    [PDF]

Bogdan Damski

We derive an exact closed-form expression for fidelity susceptibility of the quantum Ising model in the transverse field. We also establish an exact one-to-one correspondence between fidelity susceptibility in the ferromagnetic and paramagnetic phases of this model. Elegant summation formulas are obtained as a by-product of these studies.

View original: http://arxiv.org/abs/1212.1528