  Quantum computing has attracted the attention of the scientific community in
the past few decades. The development of quantum computers promises one path
toward safer and faster ways to treat, extract, and transfer information.
However, despite the significant advantages of quantum computing, the
development of quantum devices operating at room temperature has been
compromised by the thermal decoherence process. In addition, in most
undergraduate and graduate quantum mechanics courses, the study of thermofield
dynamics is usually neglected. In this scenario, this work explores a didactic
approach to simulate thermal qubit systems through Thermofield Dynamics (TFD),
applied in a quantum computing setup. The results show that the Bloch sphere
representation for a qubit can be written in terms of the Bogoliubov
transformation, which allows a practical construction for the thermal qubits in
a quantum computing setup. Therefore, this work introduces thermofield dynamics
through quantum computing to teachers and curious students interested in
teaching and learning this important field of studying the temperature impacts
on quantum protocols using the TFD technique.
