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The interest in post-quantum cryptography --- classical systems that remain secure in the presence of a quantum adversary --- has generated elegant proposals for new cryptosystems. Some of these syste...
De Sitter brane-world, localization of gravity, and the cosmological constant
De Sitter brane-world localization of gravity the cosmological constant
2010/12/24
Cosmological models with a de Sitter 3-brane embedded in a five-dimensional de Sitter spacetime (dS5) give rise to a finite 4D Planck mass similar to that in Randall-Sundrum (RS) brane-world models in...
Nonlinear sigma models with non-compact target space and non-amen-able symmetry group were introduced long ago in the study of disordered electron systems. They also occur in dimensionally reduced qua...
De Sitter brane-world, localization of gravity, and the cosmological constant
De Sitter brane-world localization of gravity cosmological constant
2010/12/21
Cosmological models with a de Sitter 3-brane embedded in a five-dimensional de Sitter spacetime
(dS5) give rise to a finite 4D Planck mass similar to that in Randall-Sundrum (RS) brane-world
models ...
Shift of percolation thresholds for epidemic spread between static and dynamic small-world networks
percolation thresholds epidemic spread static dynamic small-world networks
2010/11/16
The aim of the study was to compare the epidemic spread on static and dynamic small-world networks. The network was constructed as a 2-dimensional Watts-Strogatz model (500x500 square lattice with ad...
Nonlinear sigma models with non-compact target space and non-amen-able symmetry group were introduced long ago in the study of disor-dered electron systems. They also occur in dimensionally reduced qu...
Nonlinear sigma models with non-compact target space and non-amen-able symmetry group were introduced long ago in the study of disor-dered electron systems.
An Alternative to Decoherence by Environment and the Appearance of a Classical World
Decoherence by Environment Appearance Classical World
2010/10/18
We provide an alternative approach to the decoherence-by-environment paradigm in the field of the quantum measurement process and the appearance of a classical world. In contrast to the decoherence ap...
Quantum mechanics, by itself, implies perception of a classical world
Quantum mechanics implies perception classical world
2010/10/21
Quantum mechanics, although highly successful, has two peculiarities. First, in many situations it gives more than one potential version of reality. And second, the wave function for a macroscopic obj...
Synchronization Transition of Identical Phase Oscillators in a Directed Small-World Network
Synchronization Transition Identical Phase Oscillators Directed Small-World Network
2010/4/6
We numerically study a directed small-world network consisting of attractively coupled, identical phase oscillators. While complete synchronization is always stable, it is not always reachable from ra...
Analyzing the prices of the most expensive sheet iron all over the world: Modeling, prediction and regime change
Econophysics Auction markets Private car license plate Regime change Modelingand prediction
2010/4/27
The private car license plates issued in Shanghai are bestowed the title of "the most expensive sheet iron all over the world", more expensive than gold. A citizen has to bid in an monthly auction to ...
Structure and control of self-sustained target waves in excitable small-world networks
self-sustained target waves small-world networks dominant phase-advanced driving
2010/4/1
Small-world networks describe many important practical systems among which neural networks consisting of excitable nodes are the most typical ones. In this paper we study self-sustained oscillations o...
Proof-of-Concept of Real-World Quantum Key Distribution with Quantum Frames
Proof-of-Concept Real-World Quantum Quantum Frames
2010/4/7
We propose and experimentally investigate a fibre-based quantum key distribution system, which employs polarization qubits encoded into faint laser pulses. As a novel feature, it allows sending of cla...
A Coding of Real Null Four-Momenta into World-Sheet Coordinates
maximally violating helicity World-Sheet Coordinates Real Null Four-Momenta
2009/9/4
The results of minimizing the action for string-like systems on a simply connected world sheet are shown to encode the Cartesian components of real null momentum four-vectors into coordinates on the w...
In this paper we discuss the properties of the general covariant angular momentum of a five-dimensional brane-world model. Through calculating the total angular momentum of this model, we are able to ...