26 citations · 45 across the 5 of their papers we have counts for
7 papers
Classical nature of ordered quantum phases and origin of spontaneous symmetry breaking
M. Cianciaruso, S. M. Giampaolo, L. Ferro +4
We analyse the nature of spontaneous symmetry breaking in complex quantum systems by investigating the long-standing conjecture that the maximally symmetry-breaking quantum ground…
Measuring quantumness: from theory to observability in interferometric setups
Leonardo Ferro, Rosario Fazio, Fabrizio Illuminati +3
We investigate the notion of quantumness based on the non-commutativity of the algebra of observables and introduce a measure of quantumness based on the mutual incompatibility of…
Classical nature of ordered phases: origin of spontaneous symmetry breaking
M. Cianciaruso, L. Ferro, S. M. Giampaolo +2
We investigate the nature of spontaneous symmetry breaking in complex quantum systems by conjecturing that the maximally symmetry breaking quantum ground states are the most classi…
Defining quantumness via the Jordan product
Paolo Facchi, Leonardo Ferro, Giuseppe Marmo +1
We propose alternative definitions of classical states and quantumness witnesses by focusing on the algebra of observables of the system. A central role will be assumed by the anti…
Reduction of Lie--Jordan algebras: Quantum
F. Falceto, L. Ferro, A. Ibort +1
In this paper we present a theory of reduction of quantum systems in the presence of symmetries and constraints. The language used is that of Lie--Jordan Banach algebras, which are…
Reduction of Lie-Jordan algebras: Classical
F. Falceto, L. Ferro, A. Ibort +1
In this paper we present a unified algebraic framework to discuss the reduction of classical and quantum systems. The underlying algebraic structure is a Lie-Jordan algebra supplem…
Reduction of Lie-Jordan Banach algebras and quantum states
F. Falceto, L. Ferro, A. Ibort +1
A theory of reduction of Lie-Jordan Banach algebras with respect to either a Jordan ideal or a Lie-Jordan subalgebra is presented. This theory is compared with the standard reducti…