Many-particle robots

Many Robots Make Short Work

1. Holding a meeting At the SRI Artificial Intelligence Lab, we have a long history of building autonomous robots, from the original Shakey (remember the STRIPS planner?) through Flakey [Congdon 1993] and more recently, the Pioneer class of small robots. Our current research focuses on realtime vision for robots, and multirobot planning using an agent-oriented architecture. For the AAAI contest...

Distinguishability and Many-Particle Interference.

Quantum interference of two independent particles in pure quantum states is fully described by the particles' distinguishability: the closer the particles are to being identical, the higher the degree of quantum interference. When more than two particles are involved, the situation becomes more complex and interference capability extends beyond pairwise distinguishability, taking on a surprisin...

Particle partitioning entanglement in itinerant many-particle systems

For itinerant fermionic and bosonic systems, we study ‘particle entanglement’, defined as the entanglement between two subsets of particles making up the system. We formulate the general structure of particle entanglement in many-fermion ground states, analogous to the ‘area law’ for the more usually studied entanglement between spatial regions. Basic properties of particle entanglement are unc...

Kinetic Equations for Quantum Many-Particle Systems

Modeling crowd turbulence by many-particle simulations.

A recent study [D. Helbing, A. Johansson, and H. Z. Al-Abideen, Phys. Rev. E 75, 046109 (2007)] has revealed a "turbulent" state of pedestrian flows, which is characterized by sudden displacements and causes the falling and trampling of people. However, turbulent crowd motion is not reproduced well by current many-particle models due to their insufficient representation of the local interaction...