Negative Probability: Is It Possible?

[sairajagopal]

Are there any negative probability or negative energy photons?

 

[HallsofIvy]

Those are two completely different problems. The first question "is there negative probability" is a math problem and easily answered- by the definition of "probability" a probability must be non-negative. The second question "are there negative energy photons" is a physics problem and I will leave that to a physicist to answer.

 

[sairajagopal]

the first one also related to physics, In 1942, Paul Dirac wrote a paper: "The Physical Interpretation of Quantum Mechanics" where he introduced the concept of negative energies and negative probabilities:

"Negative energies and probabilities should not be considered as nonsense. They are well-defined concepts mathematically, like a negative of money."
The idea of negative probabilities later got increased attention in physics and particularly in quantum mechanics

my question is whether there is a chance of negative energies and probabilities of a photon