A. Verbeure et Va. Zagrebnov, NO-GO THEOREM FOR QUANTUM STRUCTURAL PHASE-TRANSITIONS, Journal of physics. A, mathematical and general, 28(18), 1995, pp. 5415-5421
We prove that quantum fluctuations can suppress structural phase trans
itions. We give a rigorous proof for a one-component (R(1)) quantum cr
ystal with local double-well anharmonism under the condition that the
masses of the atoms in the lattice sites of Z(d) (d greater than or eq
ual to 3) are light enough.