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.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 ...

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.

blog.cupcakephysics.com/quantum%20mechanics/2015/04/05/the-no-go-theorems-of-quantum-information-theory-part-2.html

Apr 5, 2015 **...** The **no**-deletion **theorem** in **quantum** information theory states given two copies
of some arbitrary **quantum** state, it is impossible to **delete** one of ...

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

Jan 10, 2016 **...** The delayed choice **quantum** eraser doesn't **delete** a qubit, it measures an
entangled qubit along a parallel axis or else along a perpendicular ...

cds.cern.ch/record/446992/files/0007035.pdf

ever, the quantum 'no-cloning theorem', due to Wooters and Zurek [6], and ...
namely a proposition that can be termed as a **quantum** '**no-deleting theorem**' [1].