A5072060193- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Pulsars and Gravitational Waves Research
- Physics of Superconductivity and Magnetism
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Image and Signal Denoising Methods
- Blind Source Separation Techniques
- Black Holes and Theoretical Physics
- Nuclear reactor physics and engineering
- Quantum Electrodynamics and Casimir Effect
- Topological Materials and Phenomena
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Quantum many-body systems
- High-pressure geophysics and materials
- Astronomical and nuclear sciences
- Semiconductor Quantum Structures and Devices
- Sparse and Compressive Sensing Techniques
- Magnetic confinement fusion research
- Astro and Planetary Science
National Natural Science Foundation of China
2023-2025
Fudan University
2016-2025
Tsinghua University
2010-2024
Institute of Modern Physics
2020-2024
Argonne National Laboratory
2024
Frankfurt Institute for Advanced Studies
2009-2024
Creighton University
2024
Guangxi Normal University
2024
Southwest Jiaotong University
2024
Huzhou University
2024
We compute the electromagnetic fields generated in heavy-ion collisions by using HIJING model. Although after averaging over many events only magnetic field perpendicular to reaction plane is sizable, we find very strong electric and both parallel on event-by-event basis. study time evolution spatial distribution of these fields. In particular, response quark-gluon plasma can give nontrivial The implications hadronic observables are also discussed.
We study the event-by-event generation of flow vorticity in BNL Relativistic Heavy Ion Collider $\mathrm{Au}+\mathrm{Au}$ collisions and CERN Large Hadron $\mathrm{Pb}+\mathrm{Pb}$ by using hijing model. Different definitions field velocity are considered. A variety properties explored, including impact parameter dependence, collision energy spatial distribution, fluctuation magnitude azimuthal direction, time evolution. In addition, distribution helicity is also studied.
The hot and dense matter generated in heavy-ion collisions may contain domains which are not invariant under P CP transformations. Moreover, can generate extremely strong magnetic fields as well electric fields. interplay between the electromagnetic field triangle anomaly leads to a number of macroscopic quantum phenomena these P- CP-odd known anomalous transports. purpose article is give pedagogical review various properties fields, transports phenomena, their experimental signatures collisions.
We derive relativistic hydrodynamic equations with a dynamical spin degree of freedom on the basis an entropy-current analysis. The first and second laws local thermodynamics constrain possible structures constitutive relations including current antisymmetric part (canonical) energy-momentum tensor. Solving obtained within linear-mode analysis, we find spin-diffusion modes, indicating that density is damped out after characteristic time scale controlled by transport coefficients introduced...
The hot and dense matter generated in heavy-ion collisions contains intricate vortical structure which the local fluid vorticity can be very large. Such polarize spin of produced particles. We study event-by-event generation so-called thermal Au+Au at energy region $\sqrt{s}=7.7--200$ GeV calculate its time evolution, spatial distribution, etc., a multiphase transport model. then compute polarization $\mathrm{\ensuremath{\Lambda}}$ $\overline{\mathrm{\ensuremath{\Lambda}}}$ hyperons as...
The deconfined quark-gluon plasma (QGP) created in relativistic heavy-ion collisions enables the exploration of fundamental properties matter under extreme conditions. Noncentral can produce strong magnetic fields on order <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mn>10</a:mn><a:mn>18</a:mn></a:msup><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi mathvariant="normal">G</a:mi></a:math>, which offers a probe into electrical conductivity QGP. In particular,...
In strong magnetic fields the transport coefficients of strange quark matter become anisotropic. We determine general form complete set in presence a field. By using local linear response method, we calculate explicitly bulk viscosities ${\ensuremath{\zeta}}_{\ensuremath{\perp}}$ and ${\ensuremath{\zeta}}_{\ensuremath{\parallel}}$ transverse parallel to $B$ field, respectively, which arise due nonleptonic weak processes $u+s\ensuremath{\leftrightarrow}u+d$. find that for $B<{10}^{17}\text{...
We analyse the energy spectra of Dirac fermions in presence rotation and magnetic field. find that Landau degeneracy is resolved by rotation. A drastic change dispersion relation leads to "rotational inhibition" a novel phenomenon analogous inverse catalysis system at finite chemical potential.
We study a relativistic plasma containing charged chiral fermions in an external electric field. show that with the presence of both vector and axial charge densities, field can induce current along its direction thus cause chirality separation. call it separation effect (CESE). On very general basis, we argue strength CESE is proportional to μ(V)μ(A) μ(V) μ(A) chemical potentials for charge. then explicitly calculate this conductivity coefficient thermal QED at leading-log order. The...
Using the second law of local thermodynamics and first-order Palatini formalism, we formulate relativistic spin hydrodynamics for quantum field theories with Dirac fermions, such as QED QCD, in a torsionful curved background. We work regime where density, which is assumed to relax much slower than other non-hydrodynamic modes, treated an independent degree freedom extended hydrodynamic description. Spin our approach contains only three modes corresponding vector, whose relaxation time...
We revisit the azimuthal angle dependence of local spin polarization hyperons in heavy-ion collisions at 200 GeV framework (3+1)D viscous hydrodynamic model CLVisc. Two different initial conditions are considered our simulation: optical Glauber condition without orbital angular momentum and AMPT with an momentum. find that hyperon strongly depends on choice so-called "spin chemical potential" $\Omega_{\mu\nu}$. With $\Omega_{\mu\nu}$ chosen to be proportional temperature vorticity,...
The quark-gluon matter produced in relativistic heavy-ion collisions may contain local domains which parity ($\mathcal{P}$) and combined charge conjugation ($\mathcal{C}\mathcal{P}$) symmetries are not preserved. When coupled with an external magnetic field, such $\mathcal{P}$- $\mathcal{C}\mathcal{P}$-odd will generate electric currents along the field---a phenomenon called chiral effect (CME). Recently, STAR Collaboration at BNL Relativistic Heavy Ion Collider (RHIC) ALICE CERN Large...
We show the existence of a new gapless collective excitation in rotating fluid system with chiral fermions, named as Chiral Vortical Wave (CVW). The CVW has its microscopic origin at quantum anomaly and macroscopically arises from interplay between vector axial charge fluctuations induced by vortical effects. wave equation is obtained both hydrodynamic current equations kinetic theory solutions nontrivial CVW-induced transport different initial conditions. Using quark-gluon plasma heavy ion...
We report the energy dependence of mid-rapidity (anti-)deuteron production in Au+Au collisions at $\sqrt{{s}_{\text{NN}}}=7.7$, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV, measured by STAR experiment BNL Relativistic Heavy Ion Collider. The yield deuterons is found to be well described thermal model. collision energy, centrality, transverse momentum coalescence parameter ${B}_{2}$ are discussed. find that values for antideuterons systematically lower than those deuterons, indicating...
Many-body systems with chiral fermions exhibit anomalous transport phenomena originated from quantum anomalies. Based on field theory, we derive the kinetic theory for interacting an external electromagnetic in a background curved geometry. The resultant framework is U(1) gauge invariant and local Lorentz diffeomorphism covariant. It particularly useful to study gravitational or noninertial effects fermions. As first application, dynamics rotating coordinate clarify roles of Coriolis force...
We perform a systematic study of the spin polarization hyperons in heavy-ion collisions using MUSIC hydrodynamic model with A Multi-Phase Transport (AMPT) pre-equilibrium dynamics. Our calculations nicely describe measured collision-energy, centrality, rapidity, and $p_T$ dependence $\Lambda$ polarization. also predict global $\Xi^-$ $\Omega^-$ as function collision energy, which provides baseline for studies magnetic moment, spin, mass For local polarization, we calculate radial azimuthal...
We study the kinematic and thermal vorticities in low-energy heavy-ion collisions by using ultrarelativistic quantum molecular dynamics model. explore their time evolution spatial distribution. find that initial have a nonmonotonic dependence on collision energy $\sqrt{{s}_{\mathrm{NN}}}$: as $\sqrt{{s}_{\mathrm{NN}}}$ grows first increase steeply then decrease with turning point around $\sqrt{{s}_{\mathrm{NN}}}\ensuremath{\approx}3--5$ GeV depending centrality.
We investigate the spin alignment of vector mesons arising from locally polarized quarks and anti-quarks (local alignment) in heavy-ion collisions. find that $ρ_{00}\neq 1/3$ does not necessarily signal global polarization along orbital angular momentum system, but may also originate their local polarization. Such could be induced by vorticity anisotropic expansion fireball. further propose experimental observables can distinguish between alignments. Measurements these collisions probe...
High-energy heavy-ion collisions generate extremely strong magnetic field which plays a key role in number of novel quantum phenomena quark-gluon plasma (QGP), such as the chiral effect (CME). However, due to complexity theoretical modellings coupled electromagnetic fields and QGP system, especially pre-equilibrium stages, lifetime medium remains undetermined. We establish, for first time, kinetic framework study dynamical decay early stages weakly by solving Boltzmann Maxwell equations....
Quarks produced in the early stage of non-central heavy-ion collisions could develop a global spin polarization along opposite direction reaction plane due to spin-orbital coupling via parton interaction medium that has finite longitudinal flow shear impact parameter. We study how such evolves multiple scattering viscous quark-gluon plasma with an initial laminar flow. The final is found be sensitive viscosity and local
We present a systematic theoretical study of the BCS-BEC crossover in two-dimensional Fermi gases with Rashba spin-orbit coupling (SOC). By solving exact two-body problem presence an attractive short-range interaction we show that SOC enhances formation bound state: binding energy $E_{\text B}$ and effective mass $m_{\text state grows along increase SOC. For many-body problem, even at weak attraction, dilute gas can evolve from BCS superfluid to Bose condensation molecules when becomes...