Researchers have observed the first evidence of 'quantum superchemistry' in the lab by binding atoms in a shared quantum state and inducing a chemical reaction. Physicists Zhendong Zhang and Cheng Chin conducted the experiment and analyzed the reaction dynamics.
atoms in an optical trap, binding them in a shared quantum state. Then the researchers induced a chemical reaction to convert them into molecules by switching on a magnetic field, and analyzed the reaction dynamics.Their results suggest chemical reactions indeed follow different rules in a degenerate quantum gas versus a normal gas.
Below a critical temperature, the team observed a steep drop in particle collisions. Meanwhile, they measured a rapid formation of molecules as atoms vanished in the chemical reaction – the particles had entered a quantum degenerate regime, and reactions were happening faster than they would under ordinary conditions.
"The sharp transition of the molecule formation rate around critical temperature Tc indicates different laws in the classical and quantum degenerate regimes," Chin and colleaguesAfter the magnetic field was switched off, the remaining atoms and molecules also hung about in a coherent coupling oscillating for several milliseconds.
"The observation of coherent and collective chemical reactions in the quantum degenerate regime paves the way to explore the interplay between many-body physics and ultracold chemistry," the researchers
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