What Do Electromagnetic Plasmas Tell Us about the Quark-Gluon Plasma?

Mrówczyński, S.; Thoma, Markus H.

doi:10.1146/annurev.nucl.57.090506.123124

Cited by 52 publications

(57 citation statements)

References 105 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Strong coupling arises when particle interaction energies exceed the kinetic energy [4]. It is important in many fields of physics spanning classical to quantum behavior [5,6,18,19] and gives rise to phase transitions and the establishment of spatial correlations of particles [4]. These studies complement experiments probing strong coupling in dusty plasmas [18] and non-neutral plasmas of pure ions or electrons [19].…”

mentioning

confidence: 99%

“…In ultracold neutral plasmas (UNPs) [2,3], which are orders of magnitude colder than any other neutral plasma and can be used to explore the physics of strongly coupled systems [4][5][6], little work has been done to study collective modes [7][8][9][10]. Here we employ a new technique for creating controlled density perturbations to excite ion acoustic waves (IAWs) in an UNP and measure their dispersion relation.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Ion Acoustic Waves in Ultracold Neutral Plasmas

2010

View full text Add to dashboard Cite

We photoionize laser-cooled atoms with a laser beam possessing spatially periodic intensity modulations to create ultracold neutral plasmas with controlled density perturbations. Laser-induced fluorescence imaging reveals that the density perturbations oscillate in space and time, and the dispersion relation of the oscillations matches that of ion acoustic waves, which are long-wavelength, electrostatic, density waves.Collective wave phenomena are central to the transport and thermodynamic properties of plasmas, and the presence of a rich spectrum of collective modes is a distinctive feature that separates this state of matter from a simple collection of charged particles [1]. In ultracold neutral plasmas (UNPs) [2,3], which are orders of magnitude colder than any other neutral plasma and can be used to explore the physics of strongly coupled systems [4][5][6], little work has been done to study collective modes [7][8][9][10]. Here we employ a new technique for creating controlled density perturbations to excite ion acoustic waves (IAWs) in an UNP and measure their dispersion relation. This flexible technique for sculpting the density distribution will open new areas of plasma dynamics for experimental study, including the effects of strong coupling on dispersion relations [11][12][13][14] and non-linear phenomena [3,10,15,16] in the ultracold regime.UNPs are formed by photoionizing laser-cooled atoms near the ionization threshold. They stretch the boundaries of traditional neutral plasma physics and have extremely clean and controllable initial conditions that make them ideal for studying phenomena seen in more complex systems, such as plasma expansion and equilibration in high-energy-density laser-matter interactions [5] and quark-gluon plasmas [6]. UNPs have shown fascinating dynamics, such as kinetic energy oscillations that directly reflect the strong coupling of ions [5,17]. Strong coupling arises when particle interaction energies exceed the kinetic energy [4]. It is important in many fields of physics spanning classical to quantum behavior [5,6,18,19] and gives rise to phase transitions and the establishment of spatial correlations of particles [4]. These studies complement experiments probing strong coupling in dusty plasmas [18] and non-neutral plasmas of pure ions or electrons [19].Previous experimental studies of collective modes in UNPs were limited to excitations of Langmuir (electron density) oscillations with radio frequency electric fields [7,8] which did not determine a dispersion relation and were relatively insensitive to dynamics of the strongly coupled ions. A high-frequency electron drift instability was observed in an UNP in the presence of crossed electric and magnetic fields [9]. Spherically symmetric ion density modulations were shown to excite IAWs in numerical simulations of UNPs [10]. Here we excite IAWs through direct imprinting of ion density modulations during plasma formation and image them in situ with time resolved laser-induced fluorescence [20].Low frequency electrostatic, o...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

Ion Acoustic Waves in Ultracold Neutral Plasmas

2010

View full text Add to dashboard Cite

show abstract

“…53 Damping can also probe important many-body properties such as viscosity, which has become a topic of great interest in strongly coupled systems. 7,54 In the case of IAWs, Landau damping is often the dominant damping mechanism. When T e % T i , there is a large population of electrons traveling at just below the phase velocity of the wave that can efficiently extract energy from the wave.…”

Section: Iaw Dampingmentioning

confidence: 99%

Creating and studying ion acoustic waves in ultracold neutral plasmas

et al. 2012

View full text Add to dashboard Cite

We excite ion acoustic waves in ultracold neutral plasmas by imprinting density modulations during plasma creation. Laser-induced fluorescence is used to observe the density and velocity perturbations created by the waves. The effect of expansion of the plasma on the evolution of the wave amplitude is described by treating the wave action as an adiabatic invariant. After accounting for this effect, we determine that the waves are weakly damped, but the damping is significantly faster than expected for Landau damping.

show abstract

“…Such distributions can trigger an instability analogous to the Weibel instability in QED plasmas [4]. Romatschke and I showed (in 3+1-D numerical solutions of CYM equations) [31] that small rapidity dependent quantum fluctuations in the initial conditions generate transverse E and B fields that grow rapidly as exp( √ Q S τ).…”

Section: Pos(lc2008)029mentioning

confidence: 99%

Inclusive gluon production in A+A collisions at NLO:Factorization and the glasma

Venugopalan¹

2009

Proceedings of LIGHT CONE 2008 Relativistic Nuclear and Particle Physics — PoS(LC2008)

View full text Add to dashboard Cite

High energy heavy ion collisions are efficiently described as the collision of two sheets of Color Glass Condensate. The dynamics of the collision can be studied ab initio in a light cone effective field theory approach. Factorization theorems allow one to separate the initial state evolution of the wave functions with energy from the final state interactions that produce matter with high energy densities called the Glasma. We discuss how this matter is formed, its remarkable properties and its relevance for understanding thermalization of the Quark Gluon Plasma. We discuss multigluon correlations in the Glasma. In particular, long range rapidity correlations, reflected in a Glasma flux tube picture of the collision, are not washed out by subsequent final state interactions and may provide a sensitive probe of early time dynamics. A near side "ridge"-like structure observed in two particle correlation studies of central heavy ion collisions can be explained as resulting from radially flowing flux tubes.

show abstract

What Do Electromagnetic Plasmas Tell Us about the Quark-Gluon Plasma?

Cited by 52 publications

References 105 publications

Ion Acoustic Waves in Ultracold Neutral Plasmas

Ion Acoustic Waves in Ultracold Neutral Plasmas

Creating and studying ion acoustic waves in ultracold neutral plasmas

Inclusive gluon production in A+A collisions at NLO:Factorization and the glasma

Contact Info

Product

Resources

About