Scientists Reveal Hidden Structure Of Quantum Fluid
Researchers at Berkeley Lab have successfully observed a tunable Bose-Einstein Condensate (BEC) of excitons in an atomically thin semiconductor at high temperatures. This discovery provides a new platform for studying quantum fluids and could lead to advancements in high-speed computing and telecommunications.
Bose-Einstein Condensates (BECs) are often described as a "fifth state of matter": a quantum state in which many particles lose their individual identities and behave as one collective object. For more than 60 years, researchers have sought to create such condensates from excitons - electron-hole pairs - as a solid-state route to macroscopic quantum coherence, which is useful for quantum technologies. This has been difficult to realize in controllable semiconductor devices because optically generated excitons have very short lifespans of around a billionth of a second, and BECs are normally attained with supercold gasses in a vacuum.
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