Physicists have created the first Bose-Einstein condensate — the mysterious “fifth state” of matter — made from quasiparticles. These are entities that do not count as elementary particles, although they can still have elementary-particle properties such as charge and spin. For decades, it was un
For the first time, researchers have created a Bose-Einstein condensate made from quasiparticles.
A close-up picture of the apparatus in a cryogen-free dilution refrigerator. A dark red-colored cubic crystal in the center of the picture is cuprous oxide. A zinc selenide meniscus lens placed behind the crystal is an objective lens. A rod and a stage below the crystal are used for generation of an inhomogeneous strain field in the crystal that acts as a trap potential for excitons.
Exotic atoms are atoms in which one subatomic particle, such as an electron or a proton, is replaced by another subatomic particle that has the same charge. Positronium, for example, is an exotic atom made of an electron and its positively charged anti-particle, a positron. Combined, this electron-hole pair is an electrically neutral “quasiparticle” called an exciton. A quasiparticle is a particle-like entity that does not count as one of the 17 elementary particles of the standard model of particle physics, but that can still have elementary-particle properties like charge and spin. The exciton quasiparticle can also be described as an exotic atom because it is in effect a hydrogen atom that has had its single positive proton replaced by a single positive hole.
“Direct observation of an exciton condensate in a three-dimensional semiconductor has been highly sought after since it was first theoretically proposed in 1962. Nobody knew whether quasiparticles could undergo Bose-Einstein condensation in the same way as real particles,” said Makoto Kuwata-Gonokami, a physicist at the University of Tokyo and co-author of the paper. “It’s kind of the holy grail of low-temperature physics.
Argentina Últimas Noticias, Argentina Titulares
Similar News:También puedes leer noticias similares a ésta que hemos recopilado de otras fuentes de noticias.
What’s the carbon footprint of a Higgs boson? It varies — a lotThe planet’s next super collider could consume as much energy as a medium-sized city — but the carbon footprints of the various designs being considered might be vastly different
Leer más »
Warriors Make Drastic Lineup Decision Ahead of Potential Fifth-Straight Loss on Road TripThe Warriors will reportedly rest Stephen Curry, Klay Thompson, Draymond Green and Andrew Wiggins tonight for the final game of their road trip
Leer más »
Ally Brooke Had *This* To Say About a Potential Fifth Harmony ReunionAlly Brooke had *this* to say about a potential Fifth Harmony reunion. 👀
Leer más »
Warriors end disasterous road trip with fifth consecutive lossWith four of their five starters out Friday night, the Warriors started Jordan Poole, Moses Moody, Anthony Lamb, Jonathan Kuminga and Kevon Looney.
Leer más »
Mike Smith is making Fifth Third Bank a home for Black entreprenuers - Jacksonville Business JournalSmith recently was named Fifth Third’s head of business banking in North Florida.
Leer más »
HBO cancels 'Westworld' after four seasons, thwarting creators' hopes for a fifth'Westworld,' an adaptation of the 1973 Michael Crichton film, starred Evan Rachel Wood and Thandiwe Newton. On Friday, HBO announced it was over.
Leer más »