54 research outputs found
Angular Momentum Mixing in Single Flavor Color Superconductivity with Transverse Pairing
Because of the equal strength of the pairing potential mediated by one-gluon
exchange for all partial waves to the leading order QCD running coupling
constant and the nonlinearity of the gap equation, the non-spherical pairing in
single flavor color superconductivity(CSC) can not be restricted in a single
non-s-wave channel and the mixing among different angular momenta will occur.
In this paper, we examine the angular momentum mixing in single flavor CSC with
transverse pairing, in which the pairing quarks have opposite helicity. We find
that the free energy of all non-spherical pairing states are lowered by angular
momentum mixing compared with that contain p-wave only. But the amount of the
free energy drop is numerically small. Consequently the most stable pairing
state that respect the time reversal invariance remains the spherical CSL.Comment: 16 pages, 2 figures, 1 table in Revte
Angular Momentum Mixing in Crystalline Color Superconductivity
In crystalline color superconductivity, quark pairs form at non-zero total
momentum. This crystalline order potentially enlarges the domain of color
superconductivity in cold dense quark matter. We present a perturbative
calculation of the parameters governing the crystalline phase and show that
this is indeed the case. Nevertheless, the enhancement is modest, and to lowest
order is independent of the strength of the color interaction.Comment: 9 pages, 2 figures, Revte
Single-photon-assisted entanglement concentration of a multi-photon system in a partially entangled W state with weak cross-Kerr nonlinearity
We propose a nonlocal entanglement concentration protocol (ECP) for
-photon systems in a partially entangled W state, resorting to some
ancillary single photons and the parity-check measurement based on cross-Kerr
nonlinearity. One party in quantum communication first performs a parity-check
measurement on her photon in an -photon system and an ancillary photon, and
then she picks up the even-parity instance for obtaining the standard W state.
When she obtains an odd-parity instance, the system is in a less-entanglement
state and it is the resource in the next round of entanglement concentration.
By iterating the entanglement concentration process several times, the present
ECP has the total success probability approaching to the limit in theory. The
present ECP has the advantage of a high success probability. Moreover, the
present ECP requires only the -photon system itself and some ancillary
single photons, not two copies of the systems, which decreases the difficulty
of its implementation largely in experiment. It maybe have good applications in
quantum communication in future.Comment: 7 pages, 3 figure
The imaginary part of the gap function in color superconductivity
We clarify general properties of the energy gap regarding its functional
dependence on the energy-momentum dictated by the invariance under a space
inversion or a time reversal. Then we derive perturbatively the equation of the
imaginary part of the gap function for dense QCD in weak coupling and
generalize our results from 2SC case to CFL case. We confirm that the imaginary
part is down by relative to the real part in weak coupling. The numerical
results show that, up to the leading order, the imaginary part is no larger
than one MeV at extremely large densities and can be as large as several MeV
the densities are of physical interest.Comment: 15 pages, 2 figures, typos corrected, a figure replaced. The version
to be appeared in Nucl.Phys.
Some Field Theoretic Issues Regarding the Chiral Magnetic Effect
In this paper, we shall address some field theoretic issues regarding the
chiral magnetic effect. The general structure of the magnetic current
consistent with the electromagnetic gauge invariance is obtained and the impact
of the infrared divergence is examined. Some subtleties on the relation between
the chiral magnetic effect and the axial anomaly are clarified through a
careful examination of the infrared limit of the relevant thermal diagrams.Comment: 19 pages, 4 figures in Latex. Typos fixed, version accepted to be
published in JHE
The Subleading Term of the Strong Coupling Expansion of the Heavy-Quark Potential in a Super Yang-Mills Vacuum
Applying the AdS/CFT correspondence, the expansion of the heavy-quark
potential of the supersymmetric Yang-Mills theory at large
is carried out to the sub-leading term in the large 't Hooft coupling at zero
temperature. The strong coupling corresponds to the semi-classical expansion of
the string-sigma model, the gravity dual of the Wilson loop operator, with the
sub-leading term expressed in terms of functional determinants of fluctuations.
The singularities of these determinants are examined and their contributions
are evaluated numerically.Comment: Updated version with minor typo corrections and new reference
Hemocyanin-derived phenoloxidase activity is dependent on dodecameric structure in shrimp Litopenaeus vannamei
Hemocyanin (Hc) is a multifunctional protein in both mollusks and arthropods.
Phenoloxidase (PO) activities are the most important physiological functions
for Hcs after conversion. In shrimp, Hc occurs as two oligomer forms,
dodecamers and hexamers. Differences in the transport oxygen capacity and
agglutination activity between the two oligomers of shrimp Hc have been
found. In the present study, we investigated the differences in the
Hc-derived PO activity between the dodecameric and hexameric Hc forms of the
shrimp Litopenaeus vannamei. The two oligomers were separated by
non-denaturing polyacrylamide gel electrophoresis, converted by trypsin
cleavage and their PO activities were determined by oxidation of L-DOPA. The
dodecamers exhibited PO activity after enzymatic conversion while the
hexamers did not exhibit PO activity. This result provides new insight into
the structural/functional relationships of Hcs
Identification and characterization of intestine microRNAs and targets in red swamp crayfish, Procambarus clarkii infected with white spot syndrome virus.
MicroRNAs (miRNAs) are small non-coding endogenous RNA molecules that play important roles in the innate immunity system of invertebrates, especially in the aspect of antivirus. In the present study, high-throughput small RNA Illumina sequencing systems were used to identify differentially expressed miRNAs (DEMs) from the intestines of Procambarus clarkii that were infected with white spot syndrome virus (WSSV). As a result, 39 known and 12 novel miRNAs were identified in both NG and WG small RNA libraries. Seven DEMs were determined to be involved in the antiviral innate immunity in the intestines of P. clarkii. The results of the target gene predictions of the DEMs showed that the putative target genes of these 7 DEMs are related to tight junctions, vascular smooth muscle contraction regulation of the actin cytoskeleton, focal adhesion, RNA transport, mRNA surveillance, viral carcinogenesis, and Salmonella infection. These results provide theoretical insights for future studies on the antiviral immunity of crustaceans
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