Trials to Transform the Digital Computers into Quantum Computers – Why Could Transistors be Transformed into Qubits?
Why recently so much effort is made to transform the digital computers (DC) into quantum computers (QC)? The answer is because the last year Google claimed that the quantum computer (QC) they built with 53-qubits had solved a problem for 200 seconds, while a super-digital-computer (DC) would need 10,000 years to solve it [1]. The University of Toronto team, lead by Dr. Voinigescu, is trying to turn the conventional transistors, used in smart phones and computers, into qubits (which record quantum information). They had successfully built a chip that contains both a potential qubit and the readout electronics. The final goal is to pack as many qubits as possible into one single chip [1]. However, the qubits of Google’s quantum computer operate at 40 K. The Toronto team used the smallest transistors, which could show quantum properties. When they cooled them to 40 K and applied magnetic field 2.5 T, they were able to split the lowest-energy states of the transistors. They hope to create electron-spin and hole-spin qubits from them. “Measurements at such low temperatures take much longer than at room temperature because you need to use very fine steps to capture the quantum effect”, says Dr. Voinigescu [1].
