Nuclear Theory·nucl-th

Friday·June 12, 2015

7 papers—4 primary·3 cross-listed

05
Universal Relations for Range Corrections to Efimov Features
Chen Ji · Eric Braaten · Daniel R. Phillips · Lucas Platter
In a three-body system of identical bosons interacting through a large S-wave scattering length $a$ , there are several sets of Efimov features related by discrete scale invariance. Effective field theory was recently used to derive universal relations between these Efimov features that include the first-order correction due to a nonzero effective range $r_{s}$ . We reveal a simple pattern in these range corrections that had not been previously identified. The pattern is explained by the renormalization group for the effective field theory, which implies that the Efimov three-body parameter runs logarithmically with the momentum scale at a rate proportional to $r_{s} / a$ . The running Efimov parameter also explains the empirical observation that range corrections can be largely taken into account by shifting the Efimov parameter by an adjustable parameter divided by a. The accuracy of universal relations that include first-order range corrections is verified by comparing with various theoretical calculations using models with nonzero range.
↳ cond-mat.quant-gasnucl-thPRA(2015)·23 citations
06
Simulating Chiral Magnetic and Separation Effects with Spin-Orbit Coupled Atomic Gases
Xu-Guang Huang🇨🇳
The chiral magnetic and chiral separation effects---quantum-anomaly-induced electric current and chiral current along an external magnetic field in parity-odd quark-gluon plasma---have received intense studies in the community of heavy-ion collision physics. We show that analogous effects occur in rotating trapped Fermi gases with Weyl-Zeeman spin-orbit coupling where the rotation plays the role of an external magnetic field. These effects can induce a mass quadrupole in the atomic cloud along the rotation axis which may be tested in future experiments. Our results suggest that the spin-orbit coupled atomic gases are potential simulators of the chiral magnetic and separation effects.
↳ cond-mat.quant-gascond-mat.mes-hallhep-phnucl-thSci.Rep.(2016)·29 citations
07
Entanglement and Fast Quantum Thermalization in Heavy Ion Collisions
Chiu Man Ho🇺🇸 · Stephen D. H. Hsu🇺🇸
Let $A$ be subsystem of a larger system $A \cup B$ , and $ψ$ be a typical state from the subspace of the Hilbert space $H_{A B}$ satisfying an energy constraint. Then $ρ_{A} (ψ) = Tr_{B} ∣ ψ ⟩ ⟨ ψ ∣$ is nearly thermal. We discuss how this observation is related to fast thermalization of the central region ( $\approx A$ ) in heavy ion collisions, where $B$ represents other degrees of freedom (soft modes, hard jets, collinear particles) outside of $A$ . Entanglement between the modes in $A$ and $B$ plays a central role: the entanglement entropy $S_{A}$ increases rapidly in the collision. In gauge-gravity duality, $S_{A}$ is related to the area of extremal surfaces in the bulk, which can be studied using gravitational duals.
↳ hep-thhep-phnucl-thMod.Phys.Lett.A(2016)·25 citations

Affiliations

first authorsco-authorsvia INSPIRE

Universal Relations for Range Corrections to Efimov Features

Simulating Chiral Magnetic and Separation Effects with Spin-Orbit Coupled Atomic Gases

Entanglement and Fast Quantum Thermalization in Heavy Ion Collisions

Affiliations