Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Theory of macroscopic quantum tunneling with Josephson-Leggett
  collective excitations in multi-band superconducting Josephson junctions   Collective excitations reveal fundamental properties and potential
applications of superconducting states. We theoretically study macroscopic
quantum tunneling (MQT) in a Josephson junction composed of multi-band
superconductors, focusing on a phase mode induced by inter-band fluctuations:
the Josephson-Leggett (JL) collective excitation mode. Using the imaginary-time
path-integral method, we derive a formula for the MQT escape rate for
low-temperature switching events. We clarify that the JL mode has two major
effects on the MQT: (i) the zero-point fluctuations enhance the escape rate,
and (ii) the quantum dissipation induced by the couplings to the
gauge-invariant phase difference suppresses the quantum tunneling. We show that
the enhancement exceeds the suppression for a wide range of junction
parameters. This enhancement originates from the single-mode interaction
between the tunneling variable and the inter-band fluctuations.

37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ