Simulation of time evolution with the MERA

Details Simulation of time evolution with the MERA Simulation of time evolution with the MERA

2007-06-06

arxiv.org/abs/0706.0868v2

Phys. Rev. A 77, 052328 (2008)

Physics

Quantum Physics

final version with data improvement (precision and size), 4.1 pages, 4 figures + extra on XY

Scientific paper

10.1103/PhysRevA.77.052328

We describe an algorithm to simulate time evolution using the Multi-scale Entanglement Renormalization Ansatz (MERA) and test it by studying a critical Ising chain with periodic boundary conditions and with up to L ~ 10^6 quantum spins. The cost of a simulation, which scales as L log(L), is reduced to log(L) when the system is invariant under translations. By simulating an evolution in imaginary time, we compute the ground state of the system. The errors in the ground state energy display no evident dependence on the system size. The algorithm can be extended to lattice systems in higher spatial dimensions.

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