Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Quantum Biological Switch Based on Superradiance Transitions   A linear chain of connected electron sites with two asymmetric sinks, one
attached to each end, is used as a simple model of quantum electron transfer in
photosynthetic bio-complexes. For a symmetric initial population in the middle
of the chain, it is expected that electron transfer is mainly directed towards
the strongest coupled sink. However, we show that quantum effects radically
change this intuitive "classical" mechanism, so that electron transfer can
occur through the weaker coupled sink with maximal efficiency. Using this
capability, we show how to design a quantum switch that can transfer an
electron to the left or right branch of the chain, by changing the coupling to
the sinks. The operational principles of this quantum device can be understood
in terms of superradiance transitions and subradiant states. This switching,
being a pure quantum effect, can be used as a witness of wave--like behaviour
of excitations in molecular chains. When realistic data are used for the
photosystem II reaction center, this quantum biological switch is shown to
retain its reliability, even at room temperature.

0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ