4 papers
SYK Correlators for All Energies
Alexandre Streicher
The Sachdev-Ye-Kitaev (SYK) model, a theory of N Majorana fermions with q-body interactions, becomes in the large q limit a conformally-broken Liouville field theory. Taking this l…
Quantum Epidemiology: Operator Growth, Thermal Effects, and SYK
Xiao-Liang Qi, Alexandre Streicher
In many-body chaotic systems, the size of an operator generically grows in Heisenberg evolution, which can be measured by certain out-of-time-ordered four-point functions. However,…
Falling Toward Charged Black Holes
Adam R. Brown, Hrant Gharibyan, Alexandre Streicher +3
The growth of the "size" of operators is an important diagnostic of quantum chaos. In arXiv:1802.01198 [hep-th] it was conjectured that the holographic dual of the size is proporti…
Operator growth in the SYK model
Daniel A. Roberts, Douglas Stanford, Alexandre Streicher
We discuss the probability distribution for the "size" of a time-evolving operator in the SYK model. Scrambling is related to the fact that as time passes, the distribution shifts…