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Questions tagged [quantum-computing]

Quantum Computation deals with considering computation as fundamentally physical, as well as replacing the classical binary digit (bit) with the quantum binary digit (qubit). While the classical bit is either 0 or 1, the qubit can be in a superposition of these states. Computation systems that use quantum phenomena, such as superposition and entanglement, can solve certain complex problems very quickly.

Related Links

Quantum Computing on Wikipedia

(Textbook) Quantum Computation and Quantum Information: The de-facto standard textbook for learning about quantum computing.

(Video Series) Quantum computing for the determined: Khan-academy-style videos explaining quantum computation, by Michael Nielson (co-author of Quantum Computation and Quantum Information).

Quantum Computing Q&A site on the Stack Exchange network.

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Is it possible to reproduce Quantum interferences with classic code?

Whilst I've heard of some quantum emmulators I don't know if I can recreate Quantum interferences (i.e. wave interferences) using them.
neo kalypsum
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Unable to load DLL 'Microsoft.Quantum.Simulator.Runtime.dll'

Getting Unable to load DLL 'Microsoft.Quantum.Simulator.Runtime.dll' error while trying to validate my Q# environment by running the teleport sample program. dotnet build dotnet run platform windows 7 64 bit with AVX enabled. vscode with .NET Core…
Vikram Palakurthi
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3 Way Quantum Entanglement with a Hadamard Transformed (superposition) Qubit

When running the following operations on 3 qubits: H(qubits[0]); CNOT(qubits[0], qubits[1]); CNOT(qubits[0], qubits[2]); CNOT(qubits[1], qubits[2]); I get these results: qubit 0 is in a superposition qubit 1 is the same as qubit 0 qubit 2 is the…
Ethan Cannoy
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Apply n qubits to a Hadamard Gate

First of all sorry for the long text, I tried to explain my problem / misunderstanding as good as possible. For my student project I have to implement a simulation of a simple Quantum Computer. What I am trying to understand right now is how…
apfello
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QISKit Implementation of the Cuccaro Adder

I'm new to quantum computing and am trying to codify a 2bit Cuccaro et all adder as described here: https://arxiv.org/pdf/quant-ph/0410184.pdf and here: https://arxiv.org/pdf/1202.6614.pdf. (I got the links from the Full Users Guide). I am having…
kaoao
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Convert from qubit density matrix to Bloch vector

Given the 2x2 density matrix of a qubit, how do I compute the point on the Bloch sphere that represents the qubit? For example, the state |0⟩-|1⟩ has a density matrix of [[0.5,-0.5],[-0.5,0.5]] and should end up along the X axis. But the density…
Craig Gidney
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Calculating the coefficients of a separable state

Given a separable 2-qubit state φ = φ0 ⊗ φ1 with φi= ai0|0> + ai1|1> φ thus can be written as φ = b00|00> + b01|01> + b10|10> + b11|11> with bij = a0ia1j. Now let some bij be given, i.e. an arbitrary 2-qubit state φ = b00|00> + b01|01> +…
Hans-Peter Stricker
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What is the rationale behind black-box quantum circuit?

I've read some material about quantum computers and quantum circuits. A certain number of already known algorithms (Simon's algorithm, period-finding algorithm, Grover's algorithm, …) have the following form: Suppose I have an unknown classical…
Contactomorph
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do you know about IBM's quantum computing platform?

I really just want to know who know's about this platform so I can understand the standards of sharing and publishing projects and code in the open source space, so, who's heard of this: http://www.research.ibm.com/quantum/
kpie
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show the qubit state α|001〉+γ|100〉 can be written as a product state of two of the qubits and the remaining qubit

I need to show that the state α|001〉+γ|100〉 can be written as a product state of two of the qubits and the remaining qubit.? I have tried this α|0〉∣01〉+γ|10〉∣0〉 α(|0〉+∣1〉)∣01〉+γ|10〉(∣0〉+∣1〉) α(|001〉+∣101〉)+γ(|100〉+∣101〉), but this ≠…
Raja
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How do I run the Initial value x0 also in parallel

This code works fine but the plot is not correct because the optimization function fmincon will depend on the initial condition x0 and the number of iterations. For each value of alpha (a) and beta (b), I should run the optimization many times with…
Raja
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Matlab call setter inside getter

I'm trying an interesting experiment using Matlab. The goal here is to model a pair of quantum entangled particles with a simple binary model (The "unknown" or "superposition" state being ignored for the moment). This is not looking for physics…
Trashman
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Quantum Computing - Hype Or Hyper?

I have recently been web-researching quantum computing. Will we see these in our lifetimes (ever?) (The error correction issue, for example, seems intractable to me).
Ben Aston
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Predictability of Pseudo Random Generators by Quantum computers

May classical pseudo random generators be predictable by powerful quantum computers in the future or is it proven that this is not possible? If they are predictable, do scientists know whether there exist PRGs that are unpredictable by quantum…
Odin
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Qbits can be both states but how and where is the manual?

So scouring the Internet attempting to find as much as i can on Quantum Computing and Qbits. It seems perhaps even with Google's purchase of the D:Wave and the somewhat increasing speak of Quantum computing, that there is still terribly little…
Derple
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