Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dissipative Phase Transition in the Open Quantum Rabi Model   We demonstrate that the open quantum Rabi model (QRM) exhibits a second-order
dissipative phase transition (DPT) and propose a method to observe this
transition with trapped ions. The interplay between the ultrastrong
qubit-oscillator coupling and the oscillator damping brings the system into a
steady-state with a diverging number of excitations, in which a DPT is allowed
to occur even with a finite number of system components. The universality class
of the open QRM, modified from the closed QRM by a Markovian bath, is
identified by finding critical exponents and scaling functions using the
Keldysh functional integral approach. We propose to realize the open QRM with
two trapped ions where the coherent coupling and the rate of dissipation can be
individually controlled and adjusted over a wide range. Thanks to this
controllability, our work opens a possibility to investigate potentially rich
dynamics associated with a dissipative phase transition.

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The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
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The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess