Qudit

A qudit logic gate (or simply qudit gate) is a basic quantum circuit that acts on a qudit.

To achieve a universal qudit gate, (a gate that can be used to approximate any unitary transformation on a quantum computer to an arbitrary degree of accuracy) a set of gates must include a finite set of single qudit gates and at least one two qudit entangling gate that can create entanglement between qudits.

Use In Measurement

Quantum information is traditionally used in Ramsey interferometry, a technique used for precise measurement across various areas of science and technology.

Qudits with d>2 have shown to increase precision and resolution of quantum measurements. qutrits for example have shown to achieve a twofold increase in resolution compared to qubits without any reduction in measurement contrast.