It’s the implementation of the quantum computer - what are the qubits and gates and things made of?
It is like we are still figuring out whether it’s better to use vacuum tubes or semiconductors or what. Google used superconducting circuits for Willow, which can be fabricated with computer-chip-style lithography etc, but needs to be kept extremely cold and the connectivity is obviously etched permanently into the circuit. Other technologies have different pros and cons.
It is like we are still figuring out whether it’s better to use vacuum tubes or semiconductors or what. Google used superconducting circuits for Willow, which can be fabricated with computer-chip-style lithography etc, but needs to be kept extremely cold and the connectivity is obviously etched permanently into the circuit. Other technologies have different pros and cons.