Maybe I will see it if I look at the definitions for phase?

==Quote.

Phase - A description for the relative position in a cyclical or wave motion. Because one complete wavelength is described as 2p radians or 360 degrees, the phase of a wave is given in radians, degrees, or fractions of a wavelength. The term in phase refers to phase angles between two wavefront occurrences of zero and 360 degrees or a whole number multiple of these.

Phase Difference - The phase angle by which one periodic disturbance or wavefront lags behind or precedes another in time or space. Phase differences are usually described in terms of fractions or multiples of a wavelength.

Phase.

In wave motion, the fraction of the time required to complete a full cycle that a point completes after last passing through the reference position. Two periodic motions are said to be in phase when corresponding points of each reach maximum or minimum displacements at the same time.

If the crests of two waves pass the same point at the same time, they are in phase for that position. If the crest of one and the trough of the other pass the same point at the same time, the phase angles differ by 180° and the waves are said to be of opposite phase. Phase differences are important in alternating electric current technology

An illustration of the meaning of phase for a sinusoidal wave. The difference in phase between waves 1 and 2 is φ and is called the phase angle. For each wave, A is the amplitude and T is the period.

==End of quote.

Looking at this last description laser light could indeed be seen as being 'in phase' as it will represent one single wave as it comes out, depending on definition of course. But then there will be only one 'phase'? But if I regulate the strength of that light, won't I get a new 'phase' then? Is that what this phase discussion is about? As for phase difference? There can't be any such in coherent light, can there?

So what happens when I regulate the strength of it? I control its energy right?

Isn't that its frequency I'm regulating there?

===Quote.

The relationship between energy and frequency relates to the energy of the photon for that particular frequency. The constant of proportionality is known as Planck's constant, and is denoted in Physics by the letter h. The formula E=hf gives the energy of a photon in Joules for a wave of frequency f Hertz.

Where E= energy, h= Planck's constant and f= Hertz

The wavelength (lambda) does not appear in this equation, as wavelength = speed of light(c) divided by frequency(f).

Or frequency = speed of light divided by wavelength,so the equation could be written as E = h times c divided by lambda, which would yield the same result

===End of quote.

Let me see if I got it straight. The energy of a photon can only be defined if treated as a wave?

==Quote

"The energy and momentum of a photon depend only on its frequency (ν) or equivalently, its wavelength (λ):"

where k is the wave vector (where the wave number k = |k| = 2π/λ), Ω = 2πν is the angular frequency, and ħ = h/2π is the reduced Planck constant

====End of quote.

So yes, energy is wavelength or, equivalently, frequency here.

So am I getting closer to the idea?

By varying the intensity/energy/wavelength/frequency you will create a different phase?

But why not call it wavelength if so?

As we're looking on one wave here, not many?

I'm not sure I really have understood this concept when it comes to the experiment.

You will not be able to give the condensate different 'phases', it seems to me, without finding a way to 'separate' that same condensate into different, sorry, don't remember the right word here, let's call it 'areas' if so?

As I said, I could be bicycling in a blue blue younder here

===

Swanson wrote "The phase information is stored because you are putting the system into a superposition of the two states, but you can do this with the wave function having different phases; this represents the phase of the incoming light."

I think I will have to reread it and see where I did go wrong

Superpositioning of two states have to mean something else than what I'm discussing here.

As this 'phase' I am seeing is just one piece of information?