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Quantum States: Harmonic Oscillators¶

Quantum States: Bipartite States¶

pyqentangle.quantumstates.bipartite.create_singlet()[source]¶

Create a two-qubit singlet state tensor.

Returns the bipartite state tensor for the singlet state \(|\Psi^+\rangle = \frac{1}{\sqrt{2}}(|01\rangle + |10\rangle)\), where element [i, j] is the coefficient of \(|ij\rangle\).

Note: the returned tensor is not normalized; multiply by \(1/\sqrt{2}\) to obtain the normalized singlet state.

Returns:: A (2, 2) array representing the singlet state tensor.
Return type:: numpy.ndarray