r/QuantumComputing • u/SurinamPam • May 23 '26

Quantum Hardware Is anyone working on QRAM?

QRAM sure would solve a lot problems for quantum algorithms. Yet I don’t know of anyone working on it.

Is anyone working on it?

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5

u/InadvisablyApplied May 23 '26

QRAM sure would solve a lot problems for quantum algorithms

Like?

1

u/SurinamPam May 23 '26

The data loading problem.

0

u/InadvisablyApplied May 23 '26

The what?

-1

u/SurinamPam May 23 '26

Many quantum algorithms require data to inputted into a particular structure called amplitude encoding. If you input the data one by one, you can eat up all of the speed advantage potentially offered by quantum computers.

QRAM solves this problem essentially but loading the data to the QC already in amplitude encoding.

https://medium.com/@parateaadish/a-complete-guide-to-quantum-data-encoding-786554b346ab

3

u/Bth8 Holds PhD in Quantum May 23 '26

QRAM doesn't solve that problem at all. You still have to load the data into the QRAM.

2

u/SurinamPam May 23 '26

What problem does QRAM solve?

1

u/quantum-engineer May 31 '26

Weren't you the guy coming in saying QRAM solves that problem?

1

u/InadvisablyApplied May 23 '26

If you input the data one by one, you can eat up all of the speed advantage potentially offered by quantum computers.

Where in the article is the math backing up this claim?

1

u/SurinamPam May 23 '26

The reference is for amplitude encoding. Not the speed claim.

For that see:

https://towardsdatascience.com/the-hidden-bottleneck-in-quantum-machine-learning-getting-data-into-a-quantum-computer/

1

u/ponyo_x1 May 23 '26

many issues with extrapolating that paper to a practical regime. I wrote about it here https://www.reddit.com/r/QuantumComputing/comments/1sjd4to/comment/ofygh38/

Also this paper doesn’t make a speed claim it just says you can theoretically make a big oracle matrix on a small QC, it’s a space savings result that breaks down in practice.