Fock space

N = 10
b = FockBasis(N)
alpha = 0.4
psi = coherentstate(b, alpha)
a = destroy(b)

A fock space describes the situation of variable particle number. I.e. the system can have zero particles, one particle, two particles and so on.

To create a basis of a Fock space QuantumOptics.jl provides the FockBasis class which has to be supplied with an integer specifying the maximum number of photons. It is defined as:

struct FockBasis <: Basis
    shape::Vector{Int}
    N::Int
end

States

• fockstate
• coherentstate

Operators

• number
• destroy
• create
• displace

Additional functions

• qfunc
• wigner

Examples

• Pumped cavity
• Jaynes-Cummings model
• Two-time correlation function and spectrum of a Fock state