# Tag Info

## Hot answers tagged models

### What are the models of quantum computation?

The adiabatic model This model of quantum computation is motivated by ideas in quantum many-body theory, and differs substantially both from the circuit model (in that it is a continuous-time model) ...
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### What are the models of quantum computation?

Quantum circuits with intermediary measurements This is a slight variation on "unitary circuits", in which one allows measurements in the middle of the algorithm as well as the end, and where one ...
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### Where can I find example circuits to learn from?

I know this is not what you are asking but this paper: Quantum Algorithm Implementations for Beginners explains the implementation of some machine learning algorithms. Hope this helps!
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### Who built the first quantum computer using at least two qubits?

It's difficult to define the point where an experimental setup is a quantum computer. But the crucial feature of a quantum computer is that it's able to perform a quantum computation. The first ...
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### What are the models of quantum computation?

Quantum annealing Quantum annealing is a model of quantum computation which, roughly speaking, generalises the adiabatic model of computation. It has attracted popular — and commercial — ...
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### What are the fundamental differences between trapped ion quantum computers and other architectures?

Disclosure: while I am not an experimental physicist, I am part of the NQIT project, which is aiming to develop quantum hardware which is suitable to realise scalable quantum computers. The ...
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### What good references would you recommend to understand the (continuous-variable) CV model of computation?

One of the best places to learn about the continuous-variable (CV) model is the documentation of the Strawberry Fields software for photonic quantum computing. It also includes several numerical ...
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### In a Quantum Turing Machine, how is the decision to move along the memory tape made?

If we have a QTM with state set $Q$ and a tape alphabet $\Sigma = \{0,1\}$, we cannot say that the qubit being scanned by the tape head "holds" a vector $a|0\rangle + b|1\rangle$ or that the (internal)...
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### Is it possible to simulate a quantum computer in Virtual Reality? If yes, how?

Virtual reality in a classical computer is just a fancy front-end on top of a classical simulation. A classical computer can simulate all of the quantum physics happening inside a quantum computer, ...
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### Anyon alternatives in topological quantum computing

Are there other instances of topological QC that do not use anyons? No, that's basically by definition. That said, there are different ways that one could use topological systems in order to achieve ...
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### What are the pros/cons of Trapped Ion Qubits, Superconducting Qubits and Si Spin Qubits?

It think the (very) short answer is that there is not a preferred platform yet. This is why there are very active research communities around each of these technologies. Often if someone says ...

### What is the simplest algorithm to demonstrate intuitively quantum speed-up?

The difficulty with the question is the word intuitive. Intuition basically reflects our understanding of the world around us, which is described by classical physics. Quantum mechanics is exactly the ...
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### Is quantum parallel search impossible?

The point is that free parallel computation or cloning of your existence is a wholesale misinterpretation of the concept of quantum superposition. Quantum states are analogous to probability ...
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### What are the pros/cons of Trapped Ion Qubits, Superconducting Qubits and Si Spin Qubits?

Here's a paper comparing Trapped Ion and Superconducting (the main competitors right now) from the group at UMD which compares their trapped ion system with IBM's transmon (superconducting) system. If ...
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### Is it possible to simulate a quantum computer in Virtual Reality? If yes, how?

Virtual reality is just a pretty front-end on top of a computer program. So, anything the computer program can do can be given a VR interface. As I see it, what is really being asked for is nice, yet '...
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### What exactly are "quantum rotors"?

Quantum rotor models are quantum systems based on the quantization of systems with rotational configuration spaces. For example, a particle moving on a ring or a pendulum are rotors whose ...
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### What does "large-scale universal quantum computation" mean?

"Large-scale" generally means that the quantum computer's ability scales to practical instances of problems. For the case of factoring, RSA keys are usually 1024/2048/4096 bit sized: if a ...