Methods of creating entanglement Entanglement is usually created by direct interactions between subatomic particles. These interactions can take numerous forms. One of the most commonly used methods is spontaneous parametric down-conversion to generate a pair of photons entangled in polarization. Other methods include the use of a fibre coupler to confine and mix photons, photons emitted from decay cascade of the bi-exciton in a quantum dot, or the use of the Hong–Ou–Mandel effect. Quantum entanglement of a particle and its antiparticle, such as an electron and a positron, can be created by partial overlap of the corresponding quantum wave functions in Hardy's interferometer. In the earliest tests of Bell's theorem, the entangled particles were generated using atomic cascades.
Methods of creating entanglement Entanglement is usually created by direct interactions between subatomic particles. These interactions can take numerous forms One of the most commonly used methods is spontaneous parametric down-conversion to generate a pair of photons entangled in polarization. Other methods include the use of a fibre coupler to confine and mix photons, photons emitted from decay cascade of the bi-exciton in a quantum dot, or the use of the Hong–Ou–Mandel effect. Quantum entanglement of a particle and its antiparticle, such as an electron and a positron can be created by partial overlap of the corresponding quantum wave functions in Hardy's interferometer. In the earliest tests of Bell's theorem, the entangled particles were generated using atomic cascades.