Squeezed Thermal Reservoir Engineering via Linear Interactions

Quantum reservoir engineering aims to transform typically detrimental dissipations into advantageous resources. We present a versatile method for creating a squeezed thermal reservoir for quantum systems. By coupling the system to a lossy mode within a normal thermal environment, we can emulate the effect of a squeezed reservoir exhibiting significantly different fluctuations along two quadratures. We demonstrate this approach through two illustrative cases: one for two-level systems, such as qubits or atoms, and another for bosonic modes, like photons or phonons. This method leverages constant linear interactions within a normal thermal environment, ensuring experimental feasibility without requiring squeezed light inputs or time-dependent modulations. This technique holds promise for various applications, including the enhancement of dissipative squeezing, stabilization of entanglement, advancement of quantum simulations, exploration of quantum thermodynamics and phase transitions, and improvement of precision measurements.