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Real-time chiral dynamics from a digital quantum simulation

Dmitri E. Kharzeev
(
- SUNY, Stony Brook and
- Brookhaven and
- RIKEN BNL
)
,
Yuta Kikuchi
(
- RIKEN BNL
)

Jan 2, 2020

10 pages

Published in:

Phys.Rev.Res. 2 (2020) 2, 023342

Published: Jun 17, 2020

e-Print:

2001.00698 [hep-ph]

DOI:

10.1103/PhysRevResearch.2.023342 (publication)

Report number:

RBRC-1321

View in:

ADS Abstract Service

reference search88 citations

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Abstract: (APS)

The chiral magnetic effect in a strong magnetic field can be described using the chiral anomaly in the (1+1)-dimensional massive Schwinger model with a time-dependent θ term. We perform a digital quantum simulation of the model at finite θ angle and vanishing gauge coupling using an IBM-Q digital quantum simulator, and observe the corresponding vector current induced in a system of relativistic fermions by a global chiral quench—a sudden change in the chiral chemical potential or θ angle. At finite fermion mass, there appears an additional contribution to this current that stems from the nonanomalous relaxation of chirality. Our results are relevant for the real-time dynamics of chiral magnetic effect in heavy ion collisions and in chiral materials, as well as for modeling high-energy processes at hadron colliders.

Note:

13 pages, 6 figures; version accepted for Physical Review Research

magnetic field: chiral
effect: magnetic
anomaly: chiral
Schwinger model: massive
fermion: relativistic
potential: chemical
current: induced
current: vector
fermion: mass
heavy ion: scattering

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Figures(6)

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