Did you mean: Quantum no-deletion theorem ?
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en.wikipedia.org/wiki/Quantum_no-deleting_theorem

In physics, the no-deleting theorem of quantum information theory is a no-go theorem which states that, in general, given two copies of some arbitrary quantum ...

en.wikipedia.org/wiki/No-cloning_theorem

In physics, the no-cloning theorem states that it is impossible to create an identical copy of an arbitrary unknown quantum state. This no-go theorem of quantum mechanics was articulated by Wootters and ... generalizes this result to mixed states. The no-cloning theorem has a time-reversed dual, the no-deleting theorem.

arxiv.org/pdf/quant-ph/0007121

and approximate quantum deleting of unknown states. We prove that unitarity does not ... prove a no-deletion theorem for non-orthogonal states us- ing unitarity.

www.hri.res.in/~akpati/bh01.pdf

No-Deleting Theorem: We cannot delete an unknown quantum state against a copy. (Pati-Braunstein, Nature 2000). |ψ〉|ψ〉→|ψ〉|0〉. • No-Partial Erasure ...

phys.org/news/2011-03-quantum-no-hiding-theorem-experimentally.html

Mar 7, 2011 ... “In quantum information science, two fundamental theorems have been the no- cloning and the no-deleting theorems,” Pati told PhysOrg.com.

physics.stackexchange.com/questions/228687/why-doesnt-the-quantum-eraser-violate-the-no-deletion-theorem

My question is, why doesn't this contradict the Quantum no-deleting theorem? Note: Okay, so have two slits and a detector. You send a photon ...

www-users.cs.york.ac.uk/schmuel/papers/bp00.pdf

79, NO. 10, 25 NOVEMBER 2000. 1426. Quantum-no-deleting principle. In a recent scientific correspondence1. Bhagwat et al. fielded baseless argu- ments that ...

www.physics.umd.edu/studinfo/courses/Phys402/AnlageSpring09/TheNoCloningTheoremWoottersPhysicsTodayFeb2009p76.pdf

linearity of quantum mechanics, the output for their super- position must be the ... running the copier in reverse to delete the extra copy in states such as +♢♢¬ or + ♡♡¬. ... because of the no-cloning theorem, Eve cannot succeed in her task.

ncatlab.org/nlab/show/no-cloning+theorem

May 19, 2017 ... In quantum physics the no-cloning theorem is the statement that one ... the content of “no-cloning” and “no-deleting” is the very “linearity” of this ...

www.nature.com/articles/35004532

We will show that there is no quantum deleting machine that can delete one .... Bu ek, V. & Hillery, M. H. Quantum copying: Beyond the no-cloning theorem. Phys  ...