• Simple is beautiful in quantum computing

    8 days ago - By Phys.org

    Quantum computing could solve problems impossible for today's supercomputers. The challenge for this new form of computing is processing the quantum bits that represent data. A qubit can be made by controlling the orientation of an electron's spin at a defect site in diamond. To solve a problem, a quantum computer uses logic gates to couple multiple qubits and output new information. Scientists designed a new protocol that can be used to develop fast, robust logic gates for qubits. The simple gates reorient electron spin on defect sites in diamond. This new finding would allow faster and...
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  • Essential quantum computer component downsized by two orders of magnitude

    8 days ago - By Phys.org

    Qubits, or quantum bits, are the key building blocks at the heart of every quantum computer. In order to perform a computation, signals are directed to and from qubits. However, qubits are extremely sensitive to interference from their environment, and need to be shielded from outside signals, in particular from magnetic fields. It is a serious problem that the devices built to shield qubits from unwanted signals, known as nonreciprocal devices, produce magnetic fields themselves. Moreover, they are several centimeters in size, which is problematic, given that a large number of such...
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