Figure 1
From: Quantum Fourier transform is the building block for creating entanglement
Representation of the \(\left| {\beta_{00} } \right\rangle = \left| {\Phi^{ + } } \right\rangle\) Bell state in terms of QFT: (a) original version based on H and CNOT gates, (b) its representations in terms of one QFT21×21 and two flipped QFT22×22, (c) original version with one H and one flipped CNOT gates, and (d) its representations in terms of one QFT21×21 and two QFT22×22.
