Extracting an answer from a quantum computer

In summary, a quantum apparatus can take two 3-qubit registers as input, multiply them, and produce output in a 6-qubit register. When the inputs are initialized as a superposition, the output will also be a superposition of all possible results. It is possible to extract a desired output, but it is not clear if one can force a specific outcome after measurement.
  • #1
quasi_Phthalo
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Suppose you have a quantum apparatus that takes two 3-qubit registers as input, multiplies them, and produces output in a 6-qubit register. If the inputs are initialized as a superposition with equal probability of being each number 000 to 111, then the output will be the superposition of all possible results of the multiplication, right?

Then the output has, for example, a 15/64 chance of being 0, 4/64 of being 12, and 0/64 of being 19, etc., right?

Is there any way to force the output to a specific value, say 35, thereby making each input collapse to a superposition of 5 and 7; then, after measuring them, you find one to be 5 and the other to be 7, effectively having factored 35?

If you CAN extract the desired output, thereby discovering the inputs that yield it, HOW do you do it?
 
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  • #2
I don't know if one can 'force' a quantum system to a desired outcome after measurement.
 

Related to Extracting an answer from a quantum computer

1. How does a quantum computer extract an answer?

A quantum computer uses quantum bits, or qubits, to perform calculations. These qubits can exist in multiple states simultaneously, allowing the computer to consider a vast number of possibilities at once. The computer then uses algorithms to manipulate and measure these qubits to extract the most likely answer.

2. What makes extracting an answer from a quantum computer different from a classical computer?

Classical computers use binary digits, or bits, to perform calculations, meaning they can only exist in one of two states (0 or 1) at a time. This limits the number of possibilities they can consider at once. Quantum computers, on the other hand, use qubits which can exist in multiple states at once, allowing for more complex calculations and the potential for faster and more accurate answers.

3. Can a quantum computer extract multiple answers at once?

Yes, a quantum computer can extract multiple answers simultaneously due to the superposition of qubits. This can be useful in solving optimization problems or searching large databases, as the computer can consider many solutions at once and provide multiple potential answers.

4. What are the limitations of extracting an answer from a quantum computer?

One limitation is the potential for errors in the calculations. Quantum computers are highly sensitive to outside interference, and the more qubits that are used, the more susceptible the system is to errors. Additionally, quantum computers are currently only able to perform certain types of calculations and may not be suitable for all tasks.

5. How can extracting an answer from a quantum computer benefit scientific research?

Quantum computers have the potential to greatly accelerate scientific research by solving complex problems and simulations that would take classical computers a long time to compute. They also have the potential to improve accuracy and efficiency in fields such as drug discovery, cryptography, and machine learning.

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