The identity operator maps every vector to itself. Every nonzero vector is an eigenvector with eigenvalue one.
Ancestors (8)
Incoming links (42)
- Energy eigenspace
- Expectation value
- Gibbs--Bogoliubov--Feynman inequality
- Global phase of a controlled quantum gate
- Ground-state degeneracy
- Hadamard gate
- Hermitian operator
- Local-unitary equivalence
- Oblique projection
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- Point spectrum
- Quantum measurement
- Qubit state
- Robertson uncertainty principle
- Tikhonov regularization
- Trace distance between qubit states
- Trivial representation
- Two-spin decoherence-free encoding
- Unique stationary state of a Lindbladian
- Unitary operator
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