Decoherence and double-slit with eraser

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SUMMARY

The discussion centers on the concept of decoherence in quantum mechanics, specifically in relation to the double-slit experiment with erasure. Bill asserts that decoherence represents an irreversible loss of information, yet the erasure experiment demonstrates that decoherence can be reversible under certain conditions. This highlights a critical distinction in the understanding of decoherence, emphasizing that it is not always irreversible as initially proposed.

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VALENCIANA
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If I say that decoherence is an irreversible loss of information, then in the double-slit with erasure when initially decoherence has occurred with the measurement, and then after erasure of the information the state is again as it was at the beginning , how can this occur if the initial decoherence was irreversible?
 
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VALENCIANA said:
If I say that decoherence is an irreversible loss of information,

You can say that - but that is not what decoherence is.

All the erasure experiment shows is in simple cases decoherence is reversible.

Thanks
Bill
 
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