Understanding Entanglement and Parallel Computing in Quantum Computing

In summary, entanglement is a key concept in quantum computing that allows for parallel computing on a single qubit by using entangled qubits to get information. This enables more efficient computing compared to classical bits. However, once a qubit's state is observed, both entangled qubits' wave functions collapse, leading to confusion about how parallel computing is possible. Additionally, the process of setting up a quantum computer for a calculation like integer factorization involves initializing a qubit with a specific wave function, but the exact process and how it leads to computation is still unclear.
  • #1
KrevinL
8
0
I'm a bit confused about entanglement with regards to quantum computing. I'm not an expert by any means, but I've been reading around about quantum computing and was confused about something.

I've read that, you can't directly observe a qubit, because if you do the wave function will collapse and it will be no better than a classical bit, so experimenters are using entanglement to get information about other qubits, enabling them to do parallel computing on a single qubit. However I'm failing to see how a qubit can still perform parallel computing, if once one qubits state is observed, both entangled qubits wave functions collapse. So I'm thinking that entanglement just gets you 2 classical bits, with the effort of only measuring one.

Can anyone tell me how this enables parallel computing within a single qubit?
 
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  • #2
Also, how is a quantum computer set up to perform a calculation like integer factorization? I think it has something to do with initializing a qubit with some wave function, but I'm not sure how this end up calculating anything.
 

FAQ: Understanding Entanglement and Parallel Computing in Quantum Computing

What is entanglement in terms of computation?

Entanglement is a phenomenon in quantum mechanics where two or more particles become correlated in such a way that the state of one particle cannot be described without considering the state of the other particle. In terms of computation, this means that the state of one particle can affect the state of another particle, even if they are physically separated.

How is entanglement used in quantum computing?

In quantum computing, entanglement is used to perform operations on multiple qubits (quantum bits) at the same time. This allows for more complex and efficient calculations compared to classical computing, where each bit can only have one value at a time.

What is the relationship between entanglement and superposition?

Superposition is another key concept in quantum mechanics, where a particle can exist in multiple states or locations at the same time. Entanglement and superposition are closely related, as entangled particles are also in a state of superposition with each other.

Can entanglement be used for communication?

While entanglement may seem like a way to instantly communicate information between particles, it cannot be used for communication in the traditional sense. This is because the state of an entangled particle cannot be controlled, so specific information cannot be transmitted.

What are the challenges in using entanglement for computation?

One of the main challenges in using entanglement for computation is maintaining the fragile state of entangled particles. Any interaction with the environment can cause the entangled state to collapse, leading to errors in calculations. Additionally, creating and controlling entangled particles is a complex and delicate process, requiring advanced technology and methods.

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