# Questions tagged [history]

Questions related to the history of quantum computers and quantum computing. Use this tag to ask questions about they history of an aspect of quantum computing (such as some concept or paradigm).

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### Wheeler's “information theoretic” derivation of quantum information

1980s. John Wheeler at the University of Texas would tell his students, “Give an information theoretic derivation of quantum theory!” Information theoretic is an adjective for Claude Shannon's ...
106 views

### Names of IBM Q backends

IBM Q backends have many different names, see for example this link. We have for example processors called Melbourne, Tokyo, Armonk etc. I am curious where these names come from? For example, I know ...
1k views

### Why does quantum computing generally use Heisenberg's Matrix Mechanics instead of Schrödinger's Wave Mechanics?

Having just studied the two formulations of quantum mechanics, it makes me wonder why the decision was used to use Heisenberg's Matrix Mechanics and not Schrödinger's Wave Mechanics? I know the two ...
2k views

### What is a flying qubit?

DiVincenzo criteria for quantum communication mentions flying qubits: a. The ability to interconvert stationary and flying qubits b. The ability to faithfully transmit flying qubits between specified ...
168 views

### What does W stand for in the W entangled state?

For the $|W_3\rangle=\frac{1}{\sqrt{3}}(|001\rangle+|010\rangle+|100\rangle)$, what does W stand for? Does it refer to an author name? Anyone knows a reference? Thanks
448 views

### Could the Hadamard gate have been constructed differently with similar characteristics?

Say we had a Hadamard-like gate with the -1 in the first entry instead of the last. Let's call it $H^1$. $$H = \begin{bmatrix}1&1\\1&-1\end{bmatrix}$$ H^1 = \begin{bmatrix}-1&1\\1&...
43 views

### History of anyon theory, braidings and tensor categories

What was the first paper/who was the first person to phrase anyon theory in terms of tensor categories? Going through Wilczek's book on fractional statistics, some of the reprinted papers anticipate ...
318 views

### Who discovered the phase kickback trick?

Was it David Deutsch? Can you say who was the first paper to mention the phase kickback trick?
285 views

### What is quantum computing vs. what is not quantum computing

That is to say, what are some common or popular misconceptions about what constitutes quantum computing? and how are those things misconceptions? It could help in explaining to frame this while ...
36k views

### Is quantum computing just pie in the sky?

I have a computer science degree. I work in IT, and have done so for many years. In that period "classical" computers have advanced by leaps and bounds. I now have a terabyte disk drive in my bedroom ...
514 views

### When was the first use of the word Entanglement?

Schrödinger wrote a letter to Einstein after the 1935 EPR paper, and in that letter Schrödinger used the German word "Verschränkung" which translates into "entanglement", but when was the word first ...
7k views

### Does Moore's law apply to quantum computing?

Plain and simple. Does Moore's law apply to quantum computing, or is it similar but with the numbers adjusted (ex. triples every 2 years). Also, if Moore's law doesn't apply, why do qubits change it?
757 views

### Why do we use the standard gate set that we do?

The typically used gate set for quantum computation is composed of the single qubits Cliffords (Paulis, H and S) and the controlled-NOT and/or controlled-Z. To go beyond Clifford we like to have full ...