Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classicalization of Quantum State of Detector by Amplification Process   It has been shown that a macroscopic system being in a high-temperature
thermal coherent state can be, in principle, driven into a non-classical state
by coupling to a microscopic system. Therefore, thermal coherent states do not
truly represent the classical limit of quantum description. Here, we study the
classical limit of quantum state of a more relevant macroscopic system, namely
the pointer of a detector, after the phase-preserving linear amplification
process. In particular, we examine to what extent it is possible to find the
corresponding amplified state in a superposition state, by coupling the pointer
to a qubit system. We demonstrate quantitatively that the amplification process
is able to produce the classical limit of quantum state of the pointer,
offering a route for a classical state in a sense of not to be projected into a
quantum superposition state.

30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn