Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum entanglement from classical trajectories   A long-standing challenge in mixed quantum-classical trajectory simulations
is the treatment of entanglement between the classical and quantal degrees of
freedom. We present a novel approach which describes the emergence of entangled
states entirely in terms of independent and deterministic Ehrenfest-like
classical trajectories. For a two-level quantum system in a classical
environment, this is derived by mapping the quantum system onto a path-integral
representation of a spin-1/2. We demonstrate that the method correctly accounts
for coherence and decoherence and thus reproduces the splitting of a wavepacket
in a nonadiabatic scattering problem. This discovery opens up a new class of
simulations as an alternative to stochastic surface-hopping, coupled-trajectory
or semiclassical approaches.

25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys