An attosecond is 1×10−18 of a second (one quintillionth of a second). For context, an attosecond is to a second what a second is to about 31.71 billion years.
[
"High harmonic generation",
"Ultrashort pulse",
"Attophysics",
"Orders of magnitude (length)",
"Orders of magnitude (speed)",
"Orders of magnitude (time)",
"attosecond pulse"
]