- #1

San K

- 911

- 1

During the creation of entangled photons (say via SPDC as described, for example, at the bottom of this post):

Do/can we also get photons that are say 60/40, 70/30 etc? ..if we remove/adjust the filter etc...

i.e. the entangled photons are not exactly half the energy

but

one of the entangled photons have 60% of the energy of the pump photon and

the other entangled photon has 40% of the energy of the pump photon.

What does that mean for, say, spin or momentum entangled photons?

How would such photons behave? in experiments like

1. double slit interference...would we have modified/

2. Bell's experiments...i.e. would we have a 60-40 correlation between spins etc?

3. Delayed choice quantum eraser etc.

etc

Do/can we also get photons that are say 60/40, 70/30 etc? ..if we remove/adjust the filter etc...

i.e. the entangled photons are not exactly half the energy

but

one of the entangled photons have 60% of the energy of the pump photon and

the other entangled photon has 40% of the energy of the pump photon.

What does that mean for, say, spin or momentum entangled photons?

How would such photons behave? in experiments like

1. double slit interference...would we have modified/

**skewed**interference pattern?2. Bell's experiments...i.e. would we have a 60-40 correlation between spins etc?

3. Delayed choice quantum eraser etc.

etc

Principle of type-II parametric down conversion to

produce directed beams of polarization entangled photons

An incident pump photon can spontaneously decay into two photons which are entangled in momentum and energy. Each photon can be emitted along a cone in

such a way that two photons of a pair are found opposite to

each other on the respective cones. The two photons are orthogonally polarized. Along the directions where the two

cones overlap, one obtains polarization-entangled pairs. In the

ﬁgure, it is assumed that a ﬁlter already selects those photons

which have exactly half the energy of a pump photon.

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