U.S. Scientists Discover New Three-body Atomic Bound States
According to a report from the American Daily Science Network on July 3, scientists at Kansas State University in the United States have discovered a new three-body atom bound state within the atom. In this state, three identical atoms are loosely attached. This quantum state is different from the three-body bound state previously discovered. It exists both in bosons and in fermions, thus helping scientists better understand matter and its composition.
Currently, scientists have not named the three-body bound state. The leader of the research, Brett Isere of Kansas State University’s Department of Physics, said: “The new bound state is very special, because even if it interacts, it doesn’t seem to be able to bind two similar atoms—the two atoms Mutual repulsion will try to break the bond between the three atoms, but it will still be able to bind the three atoms together." Research published in the recently published "Physical Review Letters" magazine.
This quantum state is similar to the loosely bound Yefimov trio bound state. In the early 1970s, Soviet physicist Vitaly Yefimov first predicted the existence of the bound state of the three-body Yefmov, but it was not until 35 years later that the scientists used supercooled atoms for the first time. Gas experiments were conducted and the bound state of the three-body Yefimov was observed.
The temperature of these supercooled atomic gases lies in degrees Kelvin above absolute zero and this temperature exists only in the laboratory. Isere said that in order to observe new quantum states, it is necessary to use the same supercooled atomic gas for experiments, because the new quantum state will only exist at this temperature.
The scientists also found that the bound state of the three-body Yefimov appears only in supercooled bosons (microscopic particles whose spins are integers), while the new bound states appear both in bosons and in bosons. In fermions (referring to microparticles that spin into half integers), all substances can be classified into these two types of particles.
Isere pointed out that another difference between the new bound state and the bound state of the three-body Yefeimov is that the bound state of the three-body Yefeimov exists only in the short-range interaction; and the new bound state exists in the short-range mutual. Between interactions and long-range interactions - short-range and long-range are the distances at which effective interactions between particles occur. Isere says that in long-range interactions, particles are far apart and interact and interact with each other without contact. In short-range interactions, particles must be very close.
The scientists said that the new quantum state fills the gaps in the three-body system and the quantum mechanical system. They will continue to study the new quantum states and reveal heavier bosons and lighter fermions in this quantum state. Performance. (Liu Xia)
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