'DOOM' is finally being ported to quantum computers, but there are still no playable quantum computers
GitHub - Lumorti/Quandoom: A port of DOOM for a quantum computer
https://github.com/Lumorti/Quandoom
DOOM has been ported to almost every useful computing device, but there has been no port to quantum computers until now. So Luke Mortimer, a quantum computer researcher at the Institut de Ciències Fotòniques (ICFO: Institute of Photon Science) in Barcelona, Spain, decided to develop a port of DOOM designed for quantum computers.
Mortimer's quantum computer port of DOOM, 'Quandoom,' is a single file written in QSAM , a programming language designed to describe quantum circuits and algorithms that run on quantum computers.
Quandoom requires 70,000 qubits and 80 million quantum gates to run. At the time of writing, no quantum computer with such performance exists, but Mortimer says that the QASM simulator can be used to run the game at 10 to 20 fps on a laptop.
The actual emulated Quandoom screen looks like this.
When the user presses a key, the value of one of the input qubits is set, and the QSAM file containing all the quantum gates is applied to the whole system.
The remaining 64,000 qubits are then measured and displayed as a 320 x 200 binary pixel screen.
By repeating this process, Mortimer explains that you can play DOOM on a quantum computer. Quandoom's quantum circuit files are so large that they require 5 to 6 GB of RAM.
Mortimer got bored after working on Quandoom for about a year, so only the first stage is playable. There are also some limitations, such as 'all objects are transparent,' 'there is no color, music, or sound effects,' 'enemies cannot move between rooms,' and 'there is no automap.'
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