![]() Having a programmable toggle switch goes a long way toward reducing noise, a common problem in quantum computer circuits that makes it difficult for qubits to make calculations and show their results clearly. Once the calculations are complete, the toggle switch can connect either of the qubits and the readout resonator to retrieve the results. When the switch is toggled on to connect the two qubits, they can interact and perform calculations. When toggled off, all three elements are isolated from each other. ![]() This toggle switch can be flipped into different states to adjust the strength of the connections between the qubits and the readout resonator. The heart of this new strategy relies on a “toggle switch” device that connects the qubits to a circuit called a “readout resonator” that can read the output of the qubits’ calculations. ![]() The device, introduced by a team of scientists at the National Institute of Standards and Technology (NIST), includes two superconducting quantum bits, or qubits, which are a quantum computer’s analogue to the logic bits in a classical computer’s processing chip. What good is a powerful computer if you can’t read its output? Or readily reprogram it to do different jobs? People who design quantum computers face these challenges, and a new device may make them easier to solve. ![]()
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