Quantum computers seem to exists in a superposition of theoretical and practical states; there seems to be a lot of progress in the field, but a fully-realized quantum computer remains a hypothetical. On the theoretical level, we can exploit quantum mechanics through the use of a qubit—a quantum bit—that stores and operates on information much like a bit in a computer and works on a simple 1 or 0. Thanks to the oddities of quantum mechanics, the qubits can be thought of as simultaneously 1 and 0, as well as all the values in between. Two papers in this week's edition of Science report on research using quantum dots—solid state qubits—to make both a simple quantum logic gate with a single qubit and a coupled dynamic system of two linked qubits.
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