Quantum limit

Quantum limit in physics refers to a limit on measurement accuracy at quantum scales^[1].

It may refer to the minimum level of quantum noise which is obtainable without squeezed states. For instance, the sensitivity of optical measurements has a standard quantum limit^[2]. There is additionally a quantum limit for phase noise, reachable only by a laser at high noise frequencies.

In spectroscopy, the shortest wavelength in an X-ray spectrum is called the quantum limit^[3]

See also

• Classical limit
• Heisenberg limit
• Relativistic limit

References

1. ^ Vladimir Borisovich Braginskiĭ and Farid Ya. Khalili. "Quantum Measurement." 1995.
2. ^ M. T. Jaekel and S. Reynaud, “Quantum limits in interferometric measurements”, Europhys. Lett. 13, 301. 1990.
3. ^ Donald Stover Piston, "The Polarization of X-rays from Thin Targets." 1935.