In a conventional computer, a bit can represent either 1 or 0 at any time. Thanks to the quirks of quantum mechanics, the equivalent in a quantum computer, a qubit, can represent both values at once.
At the quantum scale, virtual pairs consisting of a particle and its antimatter equivalent are constantly popping into existence.
从量子层面来说，空间中一直不断出现由一个正粒子和与其对应的反物质组成的反粒子虚偶。
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A simple equivalent circuit model of quantum well laser (QW LD) which is derived by QW rate equations and is accomplished in the circuit simulation program SPICE.