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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7
votes
2answers
306 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&...
3
votes
0answers
24 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 ...
7
votes
2answers
155 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?
7
votes
3answers
193 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 ...
136
votes
13answers
31k 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 ...
9
votes
3answers
203 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 ...
24
votes
5answers
5k 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?
13
votes
1answer
500 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 ...
10
votes
2answers
206 views

Who built the first quantum computer using at least two qubits?

In my previous question I asked who invented a quantum computer using qubits. As a follow-up to this question I want to ask who built the first quantum computer using at least two qubits. During my ...
18
votes
2answers
4k views

Who invented quantum computing?

As I understand it, the field of quantum mechanics was started in the early 20th century when Max Planck solved the black-body radiation problem. But I don't know when the idea of computers using ...