Published on *QUROPE* (http://qurope.eu)

Thu, 2016-08-04 11:35 - Shannon Whitlock [1]

Date:

2016-08-03

Reference:

arXiv:1605.08609

URL:

Complex systems are often found to exhibit unexpectedly simple scaling laws that can signal new physical regimes or universal relations between otherwise very different systems. Although this provides a powerful tool for characterising systems close to equilibrium, there are only few known examples where scaling behaviour can be found in dynamical settings. Here we demonstrate power-law scaling in a well-controlled quantum spin system driven out of equilibrium. This enables us to reconstruct the non-equilibrium phase diagram of the system and identify dissipation-dominated, driving-dominated and interaction-dominated regimes. The measured scaling laws show signatures of the underlying ground state phase structure, including paramagnetic behaviour, quantum critical behaviour and a magnetic instability towards states with strong spatial correlations. This opens up a new means to study and classify quantum systems out of equilibrium and extends the domain where scale-invariant behaviour can be found.

**Links:**

[1] http://qurope.eu/users/whitlock

[2] http://arxiv.org/abs/1605.08609

[3] http://qurope.eu/category/qics/10-quantum-computation/12-simulations/1210i-simulations-many-body-interactions

[4] http://qurope.eu/category/european-commission/h2020

[5] http://qurope.eu/category/qipc/qipc

[6] http://qurope.eu/category/projects/rysq

[7] http://qurope.eu/category/qics/10-quantum-computation/15-implementations-quantum-optics/1510en-atomic-ensembles

[8] http://qurope.eu/category/attribute/result

[9] http://qurope.eu/category/virtual-institute/quantum-simulation