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- QM Qubit state space representation by Projective Hilbert space
Ok, so your point is as follows: take the set of qubit's pure states (this is a concrete set, namely the set of qubit's physical pure states) We can map each of them uniquely to a ray in the abstract Hilbert space ##\mathcal H## of dimension 2 Picking a basis in the abstract ##\mathcal H## defines a (basis-dependent) isomorphism to ##\mathbb
- Schrödinger’s Cat and the Qbit - Physics Forums
Anything with a 2-dim Hilbert space is a qubit ” As an approximation for analyzing particular experiments, this can work ok–basically you are ignoring all the other degrees of freedom of the particular system (buckyball, silver atom in an S-G experiment, etc ) because you have set up the experiment so those degrees of freedom, to a good enough approximation, do not affect the outcome
- Finding E_J Value of a Qubit: Step-by-Step Guide - Physics Forums
The transition frequency of the qubit is given by $\sqrt{8EcEj} - Ec$ However, it's explicitly mentioned that it's an approximation Is there any reference from which I can obtain the original exact expression (for understanding purposes)
- Quantum computer storage capacity - Physics Forums
A qubit is not a storage element, it is a noisy processor element that has a probability; 0 ≤ p ≤ 1 Each time you read a single qubit you will get only 0 or 1 Coupling between the qubits in a QC distorts the probabilities and may statistically lead to a valid result
- How Does a Qubit Exist as Both 1 and 0 Simultaneously?
Brukner, Renner, and Cavalcanti recently won the Paul Ehrenfest award for their work deriving new no-go theorems involving an Extended Wigner's Friend Scenario, but I'm having trouble understanding certain aspects of how this thought experiment works
- Calculating qubit purity entanglement in a quantum computer
After struggling to find examples for how to calculate these purity entanglement values for each qubit, I did finally figure it out Attached is a document describing how to do this The values calculated with this method jibe with IBM's simulator for various quantum circuits including simple one-qubit gates, CNOT gates, Toffoli gates, and
- Information content of a qubit - Physics Forums
A qubit has, theoretically, an infinite number of possible states And, theoretically, each state could represent a different piece of data And, just like the above, any finite amount of information could be encoded in a single qubit state
- How to understand quantum computers? - Physics Forums
Quantum computers take advantage of entanglement A single bit is in one of two states A single qubit can be a superposition of those two states But the magic comes when you have many entangled qubits So 10 bits will have one of 1024 states 10 qubits can be a superposition of any combination of those 1024 states - an enormous number
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