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 ...

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.

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.

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  ...

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

Nov 25, 2000 ... In a recent scientific correspondence1. Bhagwat et al. fielded baseless argu- ments that the quantum-no-deleting principle2 is untenable.

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 ...

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

The delayed choice quantum eraser doesn't delete a qubit, it measures an entangled qubit along a parallel axis or else along a perpendicular ...

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.scottaaronson.com/blog/?p=2903

Sep 19, 2016 ... No-Cloning would then be like the armpit of quantum mechanics: ..... is it important that you delete the copy of your code that remains on earth?