Qualtran icon indicating copy to clipboard operation
Qualtran copied to clipboard

Qᴜᴀʟᴛʀᴀɴ is a Python library for expressing and analyzing Fault Tolerant Quantum algorithms.

Results 272 Qualtran issues
Sort by recently updated
recently updated
newest added

It would be nice to understand how many 'operator levels' exist in a bloq. Ie, if we have an operator that decomposes into 1Q/2Q/CCX qubit gates, that would be level...

This builds upon #743 (and the preceding PRs) to add a notebook which numerically and symbolically analyzes the T counts for the PLAQ hubbard bloqs (without HWP). I've kept it...

QROM takes a `num_controls` parameter and constructs one control register of bitsize=n. These usually function as a vector of flags, right? shouldn't it be `bitsize=1, shape=(n,)`? @tanujkhattar

bloqs/data_loading

Following https://github.com/quantumlib/cirq-qubitization/pull/265#discussion_r1240452520 Add a method that will blow up a bloq's soquets, get all the symbols for them. This can be used for testing or serialization. Right now this implicitly...

unary iteration / qrom bloqs support a lot of features (multi-dimensional select; `break`) that obscure the key points of the design. They're also written cirq-style where each target op `op[l]`...

bloqs/data_loading

Currently our T costs derive from https://arxiv.org/pdf/1404.5320.pdf, which gives a mean cost of 1.149 log2 (1/ε) + 9.2 for a target precision of ε. Many papers use a phase gradient...

Should be a quick test. Running --check locally however raises an error on my machine. Not sure why.

devops

The figure from the paper looks like this the current decomposition looks like Some more intermediate-abstraction bloqs could clean this up. For example: the list of CNOTs could be wrapped...

In [appendix C ](https://quantum-journal.org/papers/q-2019-12-02-208/pdf/) an algorithm is described for uncomputing table lookups. The [THC paper](https://journals.aps.org/prxquantum/pdf/10.1103/PRXQuantum.2.030305) also quotes a lower cost for inverting regular old qrom on page 15 cf. listing...

bloqs/chemistry