☆ 4.6 Article

Ground-state-energy universality of noninteracting fermionic systems

PHYSICAL REVIEW A (2021)

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Article Physics, Multidisciplinary

First-order quantum phase transitions as condensations in the space of states

Massimo Ostilli et al.

Summary: This text explains that a large class of first-order quantum phase transitions can be described as condensation in the space of states, and presents an effective decomposition method for the F space in the thermodynamic limit to study the ground state energy per particle of a system. As a function of the parameter g, the energies ε(cond) and ε(norm) cross at g = g(c), leading to a first-order quantum phase transition between a condensed phase and a normal phase of the system.

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL (2021)

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Review Physics, Multidisciplinary