Table 1 Table of operating regimes of the machine for the symmetric case with \(\omega _{S_1}=\omega _{S_2}\).

From: Impact of the sequence of system-environment interactions on the functionality and efficiency of quantum thermal machines

Label

Description

\(\dot{Q}_{c}\)

\(\dot{Q}_{m}\)

\(\dot{Q}_{h}\)

\(\dot{W}\)

I

\(T_{C}\)-power driven refrigerator

\(<0\)

\(>0\)

\(<0\)

\(>0\)

II

Dual-source accelerator

\(<0\)

\(>0\)

\(>0\)

\(>0\)

III

Dual-source engine

\(<0\)

\(>0\)

\(>0\)

\(<0\)

IV

Dual-sink accelerator

\(<0\)

\(<0\)

\(>0\)

\(>0\)

  1. The first column shows the labels of different regimes; the second column describes the functions and features of the machine; the remaining columns give the signs of the heat and work currents.