Ancilla

//ænˈsɪ.lə// noun

Definitions

Noun
  1. 1
    A maid. rare

    "‘And pass me that towel,’ added Ada, but the ancilla was picking up coins she had dropped in her haste […]"

  2. 2
    An auxiliary or accessory

    "The filter achieves this two-qubit filtering effect by using two ancilla photons as probes that detect whether or not the two input photons are in the desired states."

  3. 3
    An ancilla bit

    "The circuit uses a single ancilla for each stabilizer generator."

Etymology

From Latin ancilla (“maid, slave-girl”).

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