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phonon44145
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Are photons in the laser output beam mutually independent and can the multi-photon output be described as the tensor product of individual photon states?
phonon44145 said:That's not quite what I meant but it's conceptually close. I just don't understand how the photons can be statistically independent.
If it's a sum over Fock states, then the exact number of photons in the output must be indeterminate. But if it's indeterminate, doesn't that imply that we cannot write the output state as a product of photon states?
phonon44145 said:So if I understood correctly, in a real laser the photons are not completely independent since one cannot suppress spontaneous emission?
phonon44145 said:If that's the case, should we describe the multi-photon output as an entangled state, or does entanglement only apply when we have a fixed number of photons?
phonon44145 said:"the inverse of the laser beta factor which can be as large as 1000000:1 or above"
That's true. My question was if mutual dependence between output photons exists in principle.
phonon44145 said:Suppose this number is small (let's say, N=1 emitter to take the extreme case). How would we then write the resulting output state?
Multi-photon laser output refers to the emission of multiple photons, or packets of light energy, from a laser source. This can occur through various processes such as stimulated emission or parametric down-conversion.
Independence in multi-photon laser output refers to the ability of each photon to behave independently from the others. This is important because it allows for precise control over the direction, intensity, and polarization of the laser output.
The tensor product is a mathematical operation used to describe the combined state of multiple photons in multi-photon laser output. It takes into account the individual properties of each photon, such as its polarization and direction, to determine the overall output of the laser.
Multi-photon laser output has a wide range of applications, including in microscopy, spectroscopy, and quantum information processing. It is also used in cutting-edge technologies such as quantum computing and quantum communication.
The main difference between multi-photon and single-photon laser output is the number of photons emitted. Single-photon output consists of only one photon at a time, while multi-photon output can involve the simultaneous emission of several photons. Additionally, multi-photon output often requires specialized equipment and techniques compared to single-photon output.