



01351nas a2200157   4500008004100000245007200041210006900113260001500182300001100197490000700208520084900215100002401064700002301088700002701111856005501138       2017                        eng d00aPartial breakdown of quantum thermalization in a Hubbard-like model0 aPartial breakdown of quantum thermalization in a Hubbardlike mod  c2017/02/17  a0542040 v953 a<p><span style="color: rgb(34, 34, 34); font-family: &quot;Helvetica Neue&quot;, Helvetica, Roboto, Arial, sans-serif; font-size: 14px;">We study the possible breakdown of quantum thermalization in a model of itinerant electrons on a one-dimensional chain without disorder, with both spin and charge degrees of freedom. The eigenstates of this model exhibit peculiar properties in the entanglement entropy, the apparent scaling of which is modified from a &ldquo;volume law&rdquo; to an &ldquo;area law&rdquo; after performing a partial, site-wise measurement on the system. These properties and others suggest that this model realizes a new, nonthermal phase of matter, known as a quantum disentangled liquid (QDL). The putative existence of this phase has striking implications for the foundations of quantum statistical mechanics.</span></p>1 aGarrison, James, R.1 aMishmash, Ryan, V.1 aFisher, Matthew, P. A.  uhttp://link.aps.org/doi/10.1103/PhysRevB.95.054204