- #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/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
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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