An array of interconnected memory cells for storing therein a fractional-quantum-Hall-effect droplet whose state is controllable using voltages applied to the cell electrodes. In an example embodiment, the memory cells are arranged and linked together such as to reduce the geometric size of the array, e.g., compared to that of a linear array having the same number of memory cells. For example, one or more wheel-and-spokes arrangements of the memory cells can be used for this purpose. The smaller geometric size of the array can result in better coherence across the droplet confined therein, which can advantageously be used to improve the reliability and/or performance of the corresponding quantum-computing device.
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