Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact Born Approximation for the Spin-Boson Model   Within the lowest-order Born approximation, we present an exact calculation
of the time dynamics of the spin-boson model in the Ohmic regime. We observe
non-Markovian effects at zero temperature that scale with the system-bath
coupling strength and cause qualitative changes in the evolution of coherence
at intermediate times of order of the oscillation period. These changes could
significantly affect the performance of these systems as qubits. In the biased
case, we find a prompt loss of coherence at these intermediate times, whose
decay rate is set by $\sqrt{\alpha}$, where $\alpha$ is the coupling strength
to the environment. These calculations indicate precision experimental tests
that could confirm or refute the validity of the spin-boson model in a variety
of systems.

26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol