Tensor Networks from Simulation to Holography

4 Oct 2017, 13:45 → 6 Oct 2017, 18:00 Europe/Berlin

Bldg. 90, ZOQ (DESY Hamburg)

Karl Jansen (DESY)

This workshop is organised in collaboration with the
John von Neumann-Institute for Computing (NIC, DESY Zeuthen).

Wednesday 4 October

13:45 → 14:00 Welcome

14:00 → 15:00 Tensor network simulation of QED on infinite lattices: learning from (1+1)d, and prospects for (2+1)d

Speaker: Roman Orus

15:00 → 16:00 Holography and Quantum Information: from Novel Probes of Bulk Matter (and Geometry of Causal Diamonds) to Complexity of Quantum Fields

Speaker: Michael P. Heller

Slides michal_heller-DESY-OCT2017.pdf

16:00 → 16:30 Coffee break

16:30 → 17:30 Tensor netwrok simulations of quantum-link lattice gauge theories

Speaker: Simone Montangero

17:30 → 18:30 Bosonic mixtures of ultracold atoms

Speaker: Ludwig Mathey

Thursday 5 October

09:30 → 10:30 Entanglement entropy and related observables in gauge/gravity duality and in tensor networks

Speaker: Johanna Erdmenger

Slides t2.pdf

10:30 → 11:30 Real-time dynamics of lattice gauge theories with a few-qubit quantum computer

Gauge theories are fundamental to our understanding of interactions between the elementary constituents of matter. However, computing the real-time dynamics in gauge theories is a notorious challenge for classical computational methods. This has recently stimulated theoretical efforts to devise schemes for simulating such theories on engineered quantum-mechanical devices. In this talk I will report on the experimental demonstration of a digital quantum simulation of a lattice gauge theory, by realizing quantum electrodynamics in one spatial dimension (the Schwinger model) on a few-qubit trapped-ion quantum computer. Of particular interest is the real-time evolution of the Schwinger mechanism, describing the instability of the bare vacuum due to quantum fluctuations, which manifests itself in the spontaneous creation of electron–positron pairs. This work represents a first step towards quantum simulation of high-energy theories using atomic physics experiments.

Speaker: Esteban Martinez

11:30 → 12:00 Coffee break

12:00 → 13:00 Tensor network models of holography

Speaker: Michael Walter

13:00 → 14:30 Lunch

14:30 → 15:30 Strongly interacting systems via Quantum Links

Speaker: Debasish Banerjee

Slides desy17.pdf

15:30 → 16:00 Coffee break

16:00 → 17:00 Tensor network simulations of gauge field theories: from groundstates and particles to real-time physics

Speaker: Karel van Acoleyen

Slides Desy2017.pdf

17:00 → 17:20 Parallel Session 1 - Complexity, Holography, and Tensor Networks

Speaker: Ro Jefferson

Slides Jefferson.pdf

17:20 → 17:40 Parallel Session 1 - Thermality of eigenstates in Conformal Theories

Speaker: Diptarka Das

Slides DiptarkaDasETH.pdf

18:00 → 18:20 Parallel Session 2 - Modular discretization, fast scrambling and eigenstate thermalization for holographic systems

Speaker: Stam Nicolis

Slides Hamburg2017_Nicolis.pdf

18:20 → 18:40 Subregion complexity from topology in AdS3/CFT2

Speaker: Ignacio Reyes

Slides ReyesComplexity.pdf

19:30 → 22:00 Dinner

Friday 6 October

09:30 → 10:30 Recent results from tensor network simulations of lattice gauge theories in 1+1 dimensions

Speaker: Marie Carmen Banuls

Slides TNandLGT_Banuls.pdf

10:30 → 11:30 Simulation of background and dynamical gauge fields in quasi-1D quantum systems

Speaker: Alessio Celi

Slides talk_comp.pdf

11:30 → 12:00 Coffee break

12:00 → 13:00 Application of tensor-network techniques to far-from-equilibrium dynamics of ultracold gases

Speaker: Ippei Danshita