Quantum cloning and disentanglement

In summary, the conversation discusses the outcome of approximate quantum cloning, specifically in regards to the entanglement of the input state and the possibility of disentangling the clones for further operations and measurements. The speaker also references the no-cloning theorem and provides a link for further reading on approximate quantum cloning.
  • #1
nordinz
2
0
Hi,

I have a question with regard to the outcome of approximate quantum cloning:

For a general input state, it will always be entangled, right?
Let s = a|0> + b|1>

Then using say a Wootters-Zurek copying machine, we have:
|s>|Q> -> a|0>|0>|Q_0> + b|1>|1>|Q_1>

I need to perform some operations and measurements on the clones, but I need the states to be disentangled.
Is this possible? Any advice on how it should be done?

Thanks.
Nordin
 
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  • #2
It's not even possible to clone due to the no-cloning theorem.
 
  • #3

FAQ: Quantum cloning and disentanglement

1. What is quantum cloning and disentanglement?

Quantum cloning and disentanglement is a process in quantum mechanics where a single quantum state is replicated onto multiple systems, and then the entanglement between these systems is broken.

2. What is the purpose of quantum cloning and disentanglement?

The purpose of quantum cloning and disentanglement is to create identical copies of a quantum state, which can then be used for various tasks such as quantum communication and computation.

3. How is quantum cloning and disentanglement different from classical cloning and copying?

Quantum cloning and disentanglement is fundamentally different from classical cloning and copying because in the quantum realm, it is impossible to make an exact replica of a quantum state due to the uncertainty principle. Instead, quantum cloning and disentanglement aim to create identical copies of the quantum information contained in a state.

4. What are some potential applications of quantum cloning and disentanglement?

Some potential applications of quantum cloning and disentanglement include quantum cryptography, quantum teleportation, and quantum error correction. It can also be used to study the properties of entangled systems and for quantum computing tasks such as quantum key distribution.

5. What are the challenges in achieving quantum cloning and disentanglement?

One of the main challenges in achieving quantum cloning and disentanglement is the fragility of quantum states and their susceptibility to decoherence. Additionally, the no-cloning theorem in quantum mechanics poses a fundamental limitation on the ability to create perfect copies of quantum states.

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