10,905 research outputs found
Triton-3He relative and differential flows and the high density behavior of nuclear symmetry energy
Using a transport model coupled with a phase-space coalescence after-burner
we study the triton-3He relative and differential transverse flows in
semi-central 132Sn+124Sn reactions at a beam energy of 400 MeV/nucleon. We find
that the triton-3He pairs carry interesting information about the density
dependence of the nuclear symmetry energy. The t-3He relative flow can be used
as a particularly powerful probe of the high-density behavior of the nuclear
symmetry energy.Comment: 6 pages, 2 figures, Proceeding of The International Workshop on
Nuclear Dynamics in Heavy-Ion Reactions and the Symmetry Energ
Double neutron-proton differential transverse flow as a probe for the high-density behavior of the nuclear symmetry energy
The double neutron-proton differential transverse flowtaken from two reaction
systems using different isotopes of the same element is studied at incident
beam energies of 400 and 800 MeV/nucleon within the framework of an isospin-
and momentum-dependent hadronic transport model IBUU04. The double differential
flow is found to retain about the same sensitivity to the density dependence of
the nuclear symmetry energy as the single differential flow in the more
neutron-rich reaction. Because the double differential flow reduces
significantly both the systematic errors and the influence of the Coulomb
force, it is thus more effective probe for the high-density behavior of the
nuclear symmetry energy.Comment: 12 pages, 6 figures, version accepted for publication in Phys. Rev.
Universally-composable finite-key analysis for efficient four-intensity decoy-state quantum key distribution
We propose an efficient four-intensity decoy-state BB84 protocol and derive
concise security bounds for this protocol with the universally composable
finite-key analysis method. Comparing with the efficient three-intensity
protocol, we find that our efficient four-intensity protocol can increase the
secret key rate by at least . Particularly, this increasing rate of
secret key rate will be raised as the transmission distance increases. At a
large transmission distance, our efficient four-intensity protocol can improve
the performance of quantum key distribution profoundly.Comment: accepted by Eur. Phys. J.
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