SciPost Submission Page
Entanglement Dynamics of Random GUE Hamiltonians
by Daniel Chernowitz, Vladimir Gritsev
- Published as SciPost Phys. 10, 071 (2021)
|As Contributors:||Daniel Chernowitz|
|Arxiv Link:||https://arxiv.org/abs/2001.00140v3 (pdf)|
|Date submitted:||2021-02-23 12:49|
|Submitted by:||Chernowitz, Daniel|
|Submitted to:||SciPost Physics Core|
In this work, we consider a model of a subsystem interacting with a reservoir and study dynamics of entanglement assuming that the overall time-evolution is governed by non-integrable Hamiltonians. We also compare to an ensemble of Integrable Hamiltonians. To do this, we make use of unitary invariant ensembles of random matrices with either Wigner-Dyson or Poissonian distributions of energy. Using the theory of Weingarten functions, we derive universal average time evolution of the reduced density matrix and the purity and compare these results with several physical Hamiltonians: randomized versions of the transverse field Ising and XXZ models, Spin Glass and, Central Spin and SYK model. The theory excels at describing the latter two. Along the way, we find general expressions for exponential $n$-point correlation functions in the gas of GUE eigenvalues.
Published as SciPost Phys. 10, 071 (2021)
List of changes
We have included more elaborate numerics, up to 8 qubits, for both the main results, and for a number of established numerical models, and have made the comparisons to the GUE and Poissonian ensembles more tangible. These numerics help tie the analytic averages to more concrete parts of physics.
We have mentioned connections to planar limits of diagrams.
We have made the comparisons explicit to existing limits in RMT and entanglement of random quantum states.
Submission & Refereeing History
You are currently on this page
Reports on this Submission
Anonymous Report 2 on 2021-3-11 (Invited Report)
The authors have modified the paper in a satisfactory manner.
Anonymous Report 1 on 2021-3-3 (Invited Report)
I am satisfied with the author's reply to my report. I recommend the paper for publication in Scipost.