The 'cold' role of silicone oil in quantum computing: the 'low-temperature lubricant' for superconducting qubits

The strict requirements of quantum computing for environmental temperature (close to absolute zero) have caused traditional lubricating materials to fail, while silicone oil, with its ultra-low evaporation rate and excellent chemical stability, has become the "low-temperature guardian" of superconducting quantum bit systems. In the Google "Suzuki" quantum computer, the silicone oil coating inside the dilution refrigeration unit can effectively reduce the cold welding phenomenon between metal components, while its nanoscale thickness (only 50-100nm) avoids the interference of increased heat capacity on quantum states. More groundbreaking is the use of composite materials of silicone oil and fluoride to manufacture quantum bit bases: the material maintains elasticity at a low temperature of 20mK, absorbs mechanical vibration energy, and increases the decoherence time of quantum bits from microseconds to milliseconds, clearing key obstacles for the implementation of quantum error correction codes.