We calculate the thermal diffusion constant D T and butterfly velocity v B in neutral magnetized plasma using holographic magnetic brane background. We find the thermal diffusion constant satisfies Blake's bound. The constant in the bound D T 2πT /v 2 B is a decreasing function of magnetic field. It approaches one half in the large magnetic field limit. We also find the existence of a special point defined by Lyapunov exponent and butterfly velocity on which pole-skipping phenomenon occurs. *

In the presence of strong magnetic field, the quark gluon plasma is magnetized, leading to anisotropic transport coefficients. In this work, we focus on effect of magnetization on electric conductivity, ignoring possible contribution from axial anomaly. We generalize longitudinal and transverse conductivities to finite frequencies. For transverse conductivity, a separation of contribution from fluid velocity is needed. We study the dependence of the conductivities on magnetic field and frequency using holographic magnetic brane model. The longitudinal conductivity scales roughly linearly in magnetic field while the transverse conductivity is rather insensitive to magnetic field. Furthermore, we find the conductivities can be significantly enhanced at large frequency. This can possibly extend lifetime of magnetic field, which is a key component of chiral magnetic effect. *

We report the first observation of a significant change in plasma formation and evolution caused by a small change in the material composition (metal alloy). Thick copper rod alloys were varied in the initial diameter from 0.5 mm to 1.59 mm and pulsed to 1 mega-ampere (MA) peak current in 100 ns with a surface magnetic field rising nearly linearly at 45–80 MG/μs. The copper rods were diagnosed with surface radiometry, two-frame laser shadowgraphy, two-frame surface emission imaging, and time resolved load current measurements. Diagnostics determined time resolved surface temperature, surface expansion rates, time of surface plasma formation, and the growth rates of surface instabilities. Data indicate that copper alloy Cu-145 (99.5% Cu, 0%–0.7% Te, 0%–0.012% P) undergoes surface plasma formation when the surface magnetic field reaches 3.0 ± 0.1 MG whereas Cu-101 (>99.99% Cu) forms surface plasma at 3.5 ± 0.2 MG. The Cu-145 alloys also reach higher peak temperatures and form surface instabilities earlier in the current pulse.