What is “Frequency Entanglement”

Frequency entanglement is a quantum phenomenon that occurs when two photons are correlated in both time and frequency. It has many potential applications in quantum technology, including quantum communication, quantum sensing, and quantum computation:
Quantum communication: Frequency entanglement can be used to create secure quantum networks.

Quantum sensing: Frequency entanglement can be used in quantum sensing applications.

Quantum computation: Frequency entanglement can be used in quantum computation.

Here are some recent developments in frequency entanglement:

Two-photon interference

Researchers have demonstrated the ability to generate two-photon interference with twice the resolution of single-photon interference.

High-dimensional entanglement

Researchers have demonstrated a way to harness the large frequency-entanglement in standard continuous-wave spontaneous parametric down-conversion processes.

Frequency-degenerate four-photon entangled state

Researchers have demonstrated a way to achieve a frequency-degenerate four-photon quantum state using silicon photonics.

Entanglement is a property of quantum states where two particles are so correlated that they cannot be described independently. Einstein famously called entanglement “spooky action at a distance” because it seemed to allow particles to communicate faster than the speed of light.

Frequency Entanglement Manifestations in Art

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