Materiequbits
Materiequbits, or matter qubits, are quantum bits realized in material systems where the two logical states are represented by distinct internal states of a particle or collective excitation. The information is encoded in stable, discrete degrees of freedom such as atomic or nuclear spin, hyperfine or Zeeman levels, charge or orbital configurations, or solid-state defect states. Compared with photonic qubits, which use photons, matter qubits rely on matter-based platforms that can hold and process quantum information locally and, in some cases, interface with light for communication.
Leading implementations include trapped ions, neutral atoms in optical lattices or tweezer arrays, nitrogen-vacancy centers in
Two-qubit gates are realized through interactions such as shared vibrational modes in ions, exchange interactions in
Applications include universal quantum computation, quantum simulation, and quantum memory. Some platforms also serve as quantum-network