In this article, we present and discuss a board game called QTris that uses a concise set of rules to describe the quantum mechanics of nine qubits through the conceptual framework of preparation, operations, and measurement. Indeed, there is no quantum experiment on nine qubits that is not a game of QTris. Similarly, every game of QTris describes a quantum mechanical experiment. We show how, through its gameplay mechanics and strategies, QTris clearly emphasises the differences between statistical mixtures and coherent superpositions. As a result, the game mechanics of QTris provide an interpretation of quantum mechanics in the form of game strategies. This interpretation is clear-cut and free of metaphors.
We propose to use a linear array of singly trapped electrons to implement a spin chain for quantum communication.
The effective spin-spin interaction is realized by means of a magnetic field gradient, which couples the
electron spin to the motional degrees of freedom. Then the Coulomb repulsion between the particles transmits
this coupling throughout the array. The resulting system can be described in terms of a Heisenberg model with
long-range interactions showing a dipolar decay. We estimate the fidelity of the system in reproducing an ideal
spin chain by taking into account the influence of the electron spatial motion.
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