We begin by sending a single linearly polarised photon through a half wave plate (HWP), which creates a superposition of horizontal and vertical polarisations, i.e. the state {1 over sqrt{2}} bigl( vert H rangle + vert V rangle bigr).
As Neil Scotton from the One Leadership Project pointed out, it's all too easy to get caught in polarised thinking - I'm right, they're wrong, I see, they're blind, and so on: "Get round the other side of the table!
The in/out question gives polarised answers – I have yet to hear from anyone sitting on the fence.
"By making it so salient, and advertising this, and emphasising it so much, they're actually perpetuating the problem," Feinberg said, the "problem" being "this notion that America's polarised and I can't even talk to anybody that's on the other side".
This type of contradiction is becoming increasingly frequent in our polarised world, as I discovered last month, when I arrived in Kuala Lumpur to find that the Malaysian government had banned three of my books as "incompatible with peace and social harmony".
"Sadly this has become a polarised debate and I applaud Michael for putting his head above the parapet when he didn't need to," he said.
For myself, having grown up in the older, more polarised, dance culture, I'm temperamentally and critically inclined to enjoy the richness of the new.
They were, and maybe still are, the band that gets the most polarised reaction when I play their records – as the book makes clear, they got under the skin of almost everyone, causing either outrage or infatuation.
Dave Kranz, chief political reporter for the Argus-Leader, Sioux Falls's newspaper, calls this "the most polarised and nastiest election I've ever seen".Mr Daschle has raised $18m and Mr Thune $13m (plus outside money) in a state where TV advertising is cheap.
Twitter is good on these things but the view was pretty polarised, with half saying I should save my money and have the damn thing taken out while the other half said that to do so was a false economy and I should hang on to it.
