Scalable Thermalization of Wiring and Attenuation of Signals for Quantum Devices within Quantum Computing Systems

A cryogenic system comprising:

• a first cryogenic chamber;
• a signal reflector element, positioned within the first cryogenic chamber, being configured to split an input signal into a first signal component and a second signal component via a partial reflection of the input signal that causes the first signal component of the input signal to be reflected by the signal reflector element and the second signal component of the input signal to be transmitted by the signal reflector element;
• a second cryogenic chamber;
• a first signal line configured to provide the input signal from an external environment to the signal reflector element and to provide the reflected first signal component from the signal reflector element to the external environment, wherein the external environment is external to each of the first cryogenic chamber and the second cryogenic chamber;
• and
• a second signal line configured to provide the transmitted second signal component from the signal reflector element to the second cryogenic chamber, wherein the signal reflector element electrically couples the first signal line to the second signal line such that the second signal component transmitted by the signal reflector element is transmitted to the second signal line via the signal reflector element. 20 A computing system comprising:
• a signal reflector element being configured to split an input signal into a first signal component and a second signal component via a partial reflection of the input signal that causes the first signal component of the input signal to be reflected by the signal reflector element and the second signal component of the input signal to be transmitted by the signal reflector element;
• an information-encoding device;
• a first signal line configured to provide the input signal to the signal reflector element and to provide the reflected first signal component from the signal reflector element to a room temperature (RT) environment;
• and
• a second signal line configured to provide the transmitted second signal component from the signal reflector element to the information-encoding device.