Two independent objects each can have either the shape of a circle or of a square. In a quantum superposition state of the system, the four possible classical states have probabilities as shown here.
| Shape 1 |
Shape 2 |
Probability of State |
| 1 |
2 |
10% |
| 1 |
2 |
40% |
| 1 |
2 |
40% |
| 1 |
2 |
10% |
If the first object is measured to be in its square shape, what is the probability that the second object will be in its circle shape?
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