Quantum algorithms for cooling: a simple case study

Understand

Preparation of low-energy quantum many-body states has a wide range of applications in quantum information processing and condensed matter physics.

• Quantum cooling algorithms offer a promising alternative to other methods based, for instance, on variational and adiabatic principles, or on dissipative state preparation.
• In this work, we investigate a set of cooling algorithms in a simple, solvable fermionic model which allows us to identify the mechanisms which underlie the cooling process and, also, those which prevent it.
• We derive analytical expressions for the cooling dynamics, steady states, and cooling rates in the weak coupling limit.