14,562 research outputs found
On the theory of polarization transfer in inhomogeneous magnetized plasmas
Polarization transfer theory in inhomogeneous magnetized plasmas with mode couplin
A Study of Longitudinal Oscillations of Propellant Tanks and Wave Propagations in Feed Lines. Part III - Wave Propagation in an Elastic Pipe Filled with Incompressible Viscous Streaming Fluid
Longitudinal wave propagation in elastic pipe filled with incompressible viscous streaming flui
Formation of Non-reciprocal Bands in Magnetized Diatomic Plasmonic Chains
We show that non-reciprocal bands can be formed in a magnetized periodic
chain of spherical plasmonic particles with two particles per unit cell.
Simplified form of symmetry operators in dipole approximations are used to
demonstrate explicitly the relation between spectral non-reciprocity and broken
spatial-temporal symmetries. Due to hybridization among plasmon modes and free
photon modes, strong spectral non-reciprocity appears in region slightly below
the lightline, where highly directed guiding of energy can be supported. The
results may provide a clear guidance on the design of one-way waveguides
Vortex simulation of the pressure field of a jet
Fluctuations of the pressure field of a jet are simulated numerically by a flow model consisting of axisymmetric vortex rings with viscous cores submerged in an inviscid uniform stream. Vortex shedding time intervals, randomly created to imitate the time-history characteristics of the pressure signals of a jet, are generated based on a probability distribution of the intervals between successive pressure peaks obtained from experiments. It is found that, up to five diameters downstream of the jet exit, the characteristics of the pressure fluctuations and the most probable time intervals between experimental and numerical results show good qualitative agreements. The role played by the axisymmetric vortex model in pressure field as well as extensions of the model is also discussed
Structure of the chromosphere-corona transition region
Structure and energy distribution of chromosphere-corona transition regio
No Superluminal Signaling Implies Unconditionally Secure Bit Commitment
Bit commitment (BC) is an important cryptographic primitive for an agent to
convince a mutually mistrustful party that she has already made a binding
choice of 0 or 1 but only to reveal her choice at a later time. Ideally, a BC
protocol should be simple, reliable, easy to implement using existing
technologies, and most importantly unconditionally secure in the sense that its
security is based on an information-theoretic proof rather than computational
complexity assumption or the existence of a trustworthy arbitrator. Here we
report such a provably secure scheme involving only one-way classical
communications whose unconditional security is based on no superluminal
signaling (NSS). Our scheme is inspired by the earlier works by Kent, who
proposed two impractical relativistic protocols whose unconditional securities
are yet to be established as well as several provably unconditionally secure
protocols which rely on both quantum mechanics and NSS. Our scheme is
conceptually simple and shows for the first time that quantum communication is
not needed to achieve unconditional security for BC. Moreover, with purely
classical communications, our scheme is practical and easy to implement with
existing telecom technologies. This completes the cycle of study of
unconditionally secure bit commitment based on known physical laws.Comment: This paper has been withdrawn by the authors due to a crucial
oversight on an earlier work by A. Ken
- …