http://Arxiv.org/abs/1103.0117
Or better Google the paper using string: arxiv:quant-ph/9903047v1
In order to “see” (detect) the interference pattern we have to take care about the shift of Lambda between D0D1=R01 in Fig.3 and D0D2=R02 in Fig.4. We can “see” (detect) interference only when we are able to distinguish “red slit A” and “blue slit B” photons.
My questions are:
Which causes contribute to the lambda shift? Just the 50:50 splitter BSc or as well others like Glan-Thompson prism or even the PS prism?
If I would not erase the “which-way” information with current BSc Mb Ma D1 D2 and would remove these elements and if I would rotate additionally BSa and BSb so that the photons would path without being mirrored or detected and would travel a save distance further (10m? or more?) than the corresponding entangled photons have to travel to detector D0, ... would I get an interference pattern at D0? Would I get no Lambda shift between photons of path A slit (red) and path B slit (blue) ( I used classical physical words to be short)? Would I avoid any shift between the two independent pattern so that I would not need any additional information at D0 to detect interference?
Am I able to measure an interference at D0 detector without any information of the coincidence counter? In current arrangement of the experiment the lambda shift would cause the adding of the 2 interference pattern having a lambda shift so that the accumulated pattern would show no more an interference pattern depending on the amount of lambda! Without any information of the coincidence counter and the difference between D1 and D2 related entangled events I would see no interference at D0.
Is there any eraser which would not cause a Lambda shift or any other cause so that interference could be seen?