Physicists have made a breakthrough in quantum electrodynamics by linking two different-colored photons

Scientists from the University of Bath have found a way to tie two photons of different colors together. In physics, multicolored

photons are, in fact, particles responsible forlight with different wavelengths. The discovery will lead to new advances in quantum electrodynamics. It is a field of science that describes the interaction of light and matter. Over time, the team's findings are likely to influence the development of optical and quantum communications, as well as precision measurements of frequency, time and distance.

An apple falling from a tree has speed and mass, which together give it momentum. The energy of an apple, obtained from movement, depends on the amount of movement and mass of the fruit.

Most people believe that the concept of impulse andenergy (and therefore mass) is easy to understand when it is associated with solid objects. But the idea that intangible objects like light waves also have mass is surprising to many. However, this is a well-known fact among physicists. This seemingly paradoxical idea that waves have mass is where quantum physics and the physical world meet.

Wave-particle dualism proposed by the Frenchby physicist Louis de Broglie in 1924, is a concept that describes how each particle or quantum entity can be described as a particle or wave. Throughout the history of research, many so-called quasiparticles have been discovered, which combine two different types of particles of matter, or light waves associated with a particle of matter. The list of exotic quasiparticles includes phonons, plasmons, magnons, and polaritons.

A team of physicists from the University of Bath reported on a way to create quasiparticles that bind together two different colored particles of light. They called these formations photon-photon polaritons.

The ability to detect and control photons-photons and polaritons is possible thanks to the relatively new development of high-quality microcavities.

An important feature identified duringBath's research is that the microcavity provided a whole set of split resonances, where each photon-photon pair displayed its own momentum and energy, allowing researchers to apply the concept of quasiparticles and calculate mass. According to the predictions of the researchers, photon-photon polaritons are 1000+ times lighter than electrons.

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Precision measurements are measurementsconducted with very high accuracy, i.e., with a record low error. With the smallest relative error, you can measure time or frequency, as well as laser frequency drifts.

Light waves are everything from sunlight to laser radiation.

Phonon is a quasiparticle introduced by the Soviet scientist Igor Tamm. Phonon is a quantum of vibrational motion of crystal atoms

In physics, a plasmon is a quasiparticle that corresponds to the quantization of plasma oscillations, which are collective oscillations of a free electron gas.

Magnon is a quasiparticle correspondingelementary excitation of a system of interacting spins. Crystals with several magnetic sublattices can contain several types of magnons with different energy spectra. Magnons obey Bose - Einstein statistics.

A polariton is a composite quasiparticle that appears when photons interact with elementary excitations of the medium - optical phonons, excitons, plasmons, magnons, and so on.

An optical microcavity is a trap for light in the form of a tiny thickening of optical fiber