Is It Possible to Find Complete Interference Once Which-Way Information is Obtainable?

The most widely-known formulation of the quantum eraser that used a variant of the double-slit experiment in quantum mechanics is reviewed. Instead of obtaining the expected distribution pattern based on a typical Young-type interference pattern originating at a double slit, which-way information and its associated one-hump distribution is first developed through the release of a photon by a "particle" unrelated to the "particle's" position or momentum prior to the "particle's" passage through the double-slit. Quantum erasure occurs subsequent to the release of the photon resulting in the loss of which-way information. Interestingly, sub-interference patterns (offset by a phase difference) occur that sum to the overall one-hump distribution characteristic of which-way information. This paper explores the possibility of performing quantum erasure using a single form of quantum erasure in an experiment instead of the two possibilities for quantum erasure usually employed (e.g., whether the photon is eliminated or is instead just not subject to specification regarding its location in either one or the other of the micromaser cavities). Then when the physical existent reaches the detection screen it should show a typical Young-type interference pattern like that found for classic two-slit gedankenexperiments in quantum mechanics where there is no manipulation of the "particle" in its travel to the double-slit. The distribution pattern should not exhibit the sub-interference patterns offset by a phase difference that sum to the one-hump distribution characteristic of which-way information. It may even be possible to obtain this distribution pattern after the "particle" is detected. This experimental proposal is in part supported by a gedankenexperiment discussed by Professor Scully and his colleagues at the end of their formulation of the quantum eraser effect. Professor Feynman noted that one squares wave amplitudes and then sums them to obtain probabilities of measurement results where which-way information is in principle available, that is even before the result is known. A caveat needs to be added to that principle, namely that if one can reverse the physical situation so that the which-way information is no longer available before a measurement is made and indeed does so, then one should add the wave amplitudes and then take the absolute square of the sum.