wildcat2030:

Quantum tunneling is the process by which particles—electrons and so forth—can exit a system even though they appear to be trapped. Tunneling is responsible for a number of phenomena, including the radioactive decay of some nuclei and certain ionization processes. All of these begin with a confined particle and end with it freed to go somewhere else. Measuring the rate of tunneling is a challenge, as responses in these quantum systems may occur on the order of 10-16 seconds (hundreds of attoseconds). However, knowing this information is essential for precision ultrafast physics experiments. (via Timing quantum tunneling to attosecond precision | Ars Technica)

wildcat2030:

Quantum tunneling is the process by which particles—electrons and so forth—can exit a system even though they appear to be trapped. Tunneling is responsible for a number of phenomena, including the radioactive decay of some nuclei and certain ionization processes. All of these begin with a confined particle and end with it freed to go somewhere else. Measuring the rate of tunneling is a challenge, as responses in these quantum systems may occur on the order of 10-16 seconds (hundreds of attoseconds). However, knowing this information is essential for precision ultrafast physics experiments. (via Timing quantum tunneling to attosecond precision | Ars Technica)

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