Real-time chiral dynamics from a digital quantum simulation
- URL: http://arxiv.org/abs/2001.00698v4
- Date: Tue, 16 Jun 2020 15:26:10 GMT
- Title: Real-time chiral dynamics from a digital quantum simulation
- Authors: Dmitri E. Kharzeev and Yuta Kikuchi
- Abstract summary: The chiral magnetic effect in a strong magnetic field can be described using the chiral anomaly in the $(1+1)$-dimensional massive Schwinger model.
We observe the corresponding vector current induced in a system of relativistic fermions by a sudden change in the chiral chemical potential or $theta$-angle.
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.
- Score: 1.8655840060559168
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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 $\theta$-term. We perform a digital quantum simulation of the
model at finite $\theta$-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 {\it chiral quench} -- a
sudden change in the chiral chemical potential or $\theta$-angle. At finite
fermion mass, there appears an additional contribution to this current that
stems from the non-anomalous 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.
Related papers
- Simulating Schwinger model dynamics with quasi-one-dimensional qubit arrays [0.0]
We develop a strategy to run Schwinger model dynamics on synthetic quantum spin lattices.
We show that global magnetic field patterns can drive coherent quantum dynamics of the interface equivalent to the lattice Schwinger Hamiltonian.
This work opens up a path for near-term quantum simulators to address questions of immediate relevance to particle physics.
arXiv Detail & Related papers (2024-09-22T17:58:25Z) - Real-time chiral dynamics at finite temperature from quantum simulation [0.0]
We explore the real-time dynamics of the chiral magnetic effect (CME) at a finite temperature in the (1+1)-dimensional QED.
We employ the quantum imaginary time evolution (QITE) algorithm to study the thermal states, and utilize the Suzuki-Trotter decomposition for the real-time evolution.
arXiv Detail & Related papers (2024-07-31T10:10:42Z) - Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins.
These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field.
We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
arXiv Detail & Related papers (2023-05-10T12:59:07Z) - Universality of critical dynamics with finite entanglement [68.8204255655161]
We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement.
Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
arXiv Detail & Related papers (2023-01-23T19:23:54Z) - Studying chirality imbalance with quantum algorithms [62.997667081978825]
We employ the (1+1) dimensional Nambu-Jona-Lasinio (NJL) model to study the chiral phase structure and chirality charge density of strongly interacting matter.
By performing the Quantum imaginary time evolution (QITE) algorithm, we simulate the (1+1) dimensional NJL model on the lattice at various temperature $T$ and chemical potentials $mu$, $mu_5$.
arXiv Detail & Related papers (2022-10-06T17:12:33Z) - Spreading of a local excitation in a Quantum Hierarchical Model [62.997667081978825]
We study the dynamics of the quantum Dyson hierarchical model in its paramagnetic phase.
An initial state made by a local excitation of the paramagnetic ground state is considered.
A localization mechanism is found and the excitation remains close to its initial position at arbitrary times.
arXiv Detail & Related papers (2022-07-14T10:05:20Z) - Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators.
We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure.
The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
arXiv Detail & Related papers (2021-05-27T18:00:02Z) - Molecular spin qudits for quantum simulation of light-matter
interactions [62.223544431366896]
We show that molecular spin qudits provide an ideal platform to simulate the quantum dynamics of photon fields strongly interacting with matter.
The basic unit of the proposed molecular quantum simulator can be realized by a simple dimer of a spin 1/2 and a spin $S$ transition metal ion, solely controlled by microwave pulses.
arXiv Detail & Related papers (2021-03-17T15:03:12Z) - Quantum annealing simulation of out-of-equilibrium magnetization in a
spin-chain compound [4.708182206008542]
Geometrically frustrated spin-chain compounds such as Ca3Co2O6 exhibit extremely slow relaxation under a changing magnetic field.
This work demonstrates the viability of dynamical as well as equilibrium studies of frustrated magnetism using large-scale programmable quantum systems.
arXiv Detail & Related papers (2021-01-07T21:27:23Z) - Spin Entanglement and Magnetic Competition via Long-range Interactions
in Spinor Quantum Optical Lattices [62.997667081978825]
We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter.
We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios.
These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
arXiv Detail & Related papers (2020-11-16T08:03:44Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.