Lightsaber in the context of "Sith"

Photonic molecules are a form of matter in which photons bind together to form "molecules". They were first predicted in 2007. Photonic molecules are formed when individual (massless) photons "interact with each other so strongly that they act as though they have mass". In an alternative definition (which is not equivalent), photons confined to two or more coupled optical cavities also reproduce the physics of interacting atomic energy levels, and have been termed as photonic molecules.

Researchers drew analogies between the phenomenon and the fictional "lightsaber" from Star Wars.

Jedi (/ˈdʒɛdaɪ/ ), Jedi Knights, or collectively the Jedi Order are fictional characters, and often protagonists, featured in many works within the Star Wars franchise. Working symbiotically alongside the Galactic Republic, the Jedi Order is depicted as a religious, academic, meritocratic, and military-auxiliary (peacekeeping) organization whose origin dates back thousands of years before the events of the Star Wars feature films. The fictional organization has inspired a minor real-world new religious movement and online community: Jediism.

Within the Star Wars galaxy, the Jedi Order are powerful guardians of order and justice who, through intuition, rigorous training, and intensive self-discipline, are able to wield a supernatural power known as the Force, thus achieving the ability to move objects with the mind, perform incredible feats of strength, perceive events that are distant in time or space, and connect to certain people's thoughts. George Lucas, the creator of Star Wars, explains that the Jedi are "warrior-monks who keep peace in the universe", avoiding the use of violence except as a last resort, with a mission to "use their power to keep the governments of all the planets in line, so that they don't do terrible things". The Jedi have the "moral authority to do that" since they are "the most moral of anybody in the galaxy". Throughout the franchise, Jedi are often recognizable by their robes and tunics in various shades of brown and their use of lightsabers: sword-like weapons with colorful blades made of plasma.

The universe of Star Wars is set in a fictional galaxy that serves as the primary setting for the Star Wars multimedia and film franchise. Originally established by George Lucas as a "galaxy far, far away", it comprises numerous planets, moons, star systems, and species. The galaxy is divided into four broad sub-regions: the Core Worlds, Mid Rim, Outer Rim, and Unknown Regions. Notable planets include Coruscant, an ecumenopolis in the Core that functions as a political and cultural center, and Tatooine, a desert planet located in the Outer Rim. The universe initially encompassed a collection of works recognized as canon by Lucasfilm as part of the official Star Wars storyline. Subsequent expanded material in other media was later rebranded as the Legends universe by Disney, declaring it non-canonical to the official universe.

Within this fictional body exists a variety of intelligent species, including Humans, Twi’leks, Wookiees, Rodians, and Hutts, as well as several major governing bodies throughout galactic history, such as the Galactic Republic, Galactic Empire, Rebel Alliance, New Republic, and First Order. Each of these entities operates under differing political structures, ranging from democratic institutions to totalitarian regimes. Interstellar travel is facilitated by hyperspace, allowing rapid movement between distant star systems. A central metaphysical concept in the Star Wars universe is the Force, an omnipresent energy field that connects all living things. The Force is divided into two principal aspects: the Light Side, traditionally followed by the Jedi Order, and the Dark Side, embraced by the Sith. The universe also features a high level of technological advancement, including starships, droids, and energy-based weapons such as blasters and lightsabers. The timeline of in-universe events is often measured in reference to the Battle of Yavin, a pivotal conflict depicted in the original 1977 film, serving as a chronological anchor for subsequent developments in the franchise.