Questions tagged [q#]
Q# is a domain-specific programming language used to express quantum algorithms. This tag should be used for questions related to creating/programming quantum algorithms using the 'Q#' language. If the question is unrelated to, or arising from some non-quantum aspect of Q#, it might be better to ask on StackOverflow. If appropriate, also use the [programming] tag.
163
questions
0
votes
0
answers
24
views
How to apply an SX gate in Q# [closed]
I'm trying to apply a square root of X gate, but cannot seem to find a way to do this easily in Q#, or even define my own gate from an array.
- 1
0
votes
1
answer
20
views
How to calculate 'crossing-prefactor' for AQRE
We see that the crossing-prefactor for surface codes in Azure Quantum Resource Estimator is 0.03, and it is cited in this paper https://arxiv.org/pdf/1208.0928, however, how is there a formula for ...
1
vote
1
answer
34
views
Changing the 'compilerRunTimeoutMs' timeout variable on Azure Quantum Resource Estimator
Is there any way to change the variable 'compilerRunTimeoutMs' so that I can increase the timeout for Azure Quantum Resource Estimator. The only way that seems to be an option currently is to build ...
1
vote
1
answer
33
views
Migration guide from Classic QDK to Modern QDK for Q#
Is there any sort of migration guide from the classic QDK to the modern QDK. When I am trying to use functions, I keep running into this
This documentation refers to the Classic QDK, which has been ...
0
votes
1
answer
32
views
Strange non-normal distribution histogram when applying Hadamard gate in a loop
Recently I have explored Q# quantum programming language. My basic test was this,- for 10000 times in a loop reset qubit to ...
1
vote
1
answer
41
views
Microsoft Classic QDK simulator
Is it possible to change the simulator used by the Classic QDK with Python simulation ?
It's reported that Classic QDK supports several simulators (sparse, full-state...). Which one is used when ...
- 13
2
votes
1
answer
175
views
Is there a way to implement Smolin's variant of Shor's algorithm?
I'm currently investigating Shor's algorithm and especially Smolin's variant, that he described in his article: https://arxiv.org/abs/1301.7007
My applied changes according to Smolin's variant are ...
- 135
1
vote
1
answer
27
views
Is there a way to measure a time spent for simulation? Does Q# support something like this?
I want to measure the time spent for simulation of different algorithms to make some assumption about their efficiency.
I use Microsoft Azure Quantum SDK and VS Code setup.
- 135
1
vote
1
answer
80
views
How write a marking oracle if greater than with Q#?
I'm trying to write a code to find a minimum in a list. I follow this paper : A quantum algorithm for finding the minimum. So I need to write an operator to mark the case $T
[j] < T[y]$.
My idea is ...
- 13
1
vote
1
answer
33
views
Understanding command Ignore in Q#
Consider the following code on which I want to run the resource estimator:
...
- 1,876
1
vote
1
answer
24
views
Applying Hadamard on inexistent qubit doesn't make Q# compilation fail: why?
This question is perhaps a bit unusual as I am not complaining that my code doesn't compile but rather that it compiles ;)
Consider the following code:
...
- 1,876
1
vote
1
answer
62
views
Q#: how to write an algorithm in modular form (I don't understand the syntax and the documentation is a bit obscure)
I would like to make a resource estimate based on Azure resource estimator.
However, the circuits I am interested in depend on some classical parameters: for this reason, I would like to make a ...
- 1,876
0
votes
1
answer
55
views
Displaying the circuit diagram associated to a circuit in Q#+Python
I am learning the Q# language, and my script is in Python (I am using the online Azure interface).
I created an example quantum circuit on three qubits:
...
- 1,876
1
vote
1
answer
34
views
DumpRegister sometimes blank?
I'm just getting into the baffling world of Quantum Computing so forgive me if this is straightforward...
I'm using Microsoft's Q# simulator so I know I'm allowed to peek into the internals of a Qubit ...
- 11
1
vote
1
answer
52
views
How can I get the source code of “RUS” and “PQF”
Currently, I’m studying these two papers:
“Efficient Synthesis of Universal Repeat-Until-Success Circuits” and
“Efficient synthesis of probabilistic quantum circuits with fallback”.
I want the source ...
- 95
0
votes
1
answer
98
views
Cannot import namespace from a Q# file to run it in a python script
I'm trying to run a Q# skript from python host. To do so I've installed qsharp package for python and followed all instructions as described under following link: https://learn.microsoft.com/de-de/...
- 1
1
vote
1
answer
60
views
Changing target Quantinuum Processor
I am trying to go through the Q# tutorial at https://learn.microsoft.com/en-us/training/modules/qsharp-create-first-quantum-development-kit/4-random-number-generator before I get my hands dirty and ...
- 13
0
votes
0
answers
60
views
My First Own Grover Search with Q#
After I read the "[Quantum computing foundations](https://learn.microsoft.com/en-us/training/paths/quantum-computing-fundamentals/)
of Microsoft I would like to be sure I understand a little the ...
- 13
2
votes
1
answer
74
views
How to create an arbitrary state for debugging purposes in the local computer?
Is there a way to create an arbitrary state in Q# just for debugging purposes in the local computer via the quantum full state simulator?
- 41
0
votes
1
answer
201
views
What is the data type "Unit is Adj" in Q#?
I came across it as the return type of operations in this paper: https://arxiv.org/abs/2204.13835. It is also used in various places in the Q# documentation.
- 847
0
votes
1
answer
146
views
VS Code/Q#: No namespace with the name "Microsoft.Quantum.Canon" exists [closed]
I am running the current latest version of Visual Studio Code on POP_OS (Ubuntu 22.04 LTS) and have installed all requirements to get Q# running on my machine:
I have installed the SDK following ...
- 111
0
votes
1
answer
56
views
Is there any paper about the encoding process in the machine learning API?
I want to know more details about the encoding process in machine learning. I have read the source code about the "ApproximateInputEncoder" method. It seems like a complex method. So is ...
- 43
1
vote
0
answers
64
views
What's meaning of the expression like "Qubit[] => Result"
In Q#,there are lots of expressions like "Qubit[] => Result".
It can be the type of return result,like this:
...
- 43
0
votes
1
answer
37
views
How to caculate the resources used by an operation when the operation receives arguments?
I want to use Q# to evaluate the real resources of an operation, but some problems happen.
I want to evaluate the resource of training model operation for the example of half-moons data classification....
- 43
0
votes
1
answer
26
views
Where can I find the package of "testing" when run the Linear Algebra exercise of QuantumKatas?
I want to run the Linear Algebra tutorial exercise of QuantumKatas in vscode. But the package of "testing" can't be found. The package of "qsharp" and "pytest" have been ...
- 43
1
vote
2
answers
142
views
How to caculate the inner product of two vectors with Q#
For example, if $a$ is a row vector, $b$ is a column vector, how to use Q# to calculate the inner product of these two? Which method or operator can be used? Just $a*b$? Any others?
Really need your ...
- 43
1
vote
1
answer
42
views
Result and IQArray could not be found
I am following this MS tutorial to add functionality to my Q#/C#host project.
However, I get two errors on my operations:
...
- 163
0
votes
1
answer
51
views
Q# Application Template available for VS2022? [closed]
Implemented Grover Search Tutorial using Q# in VS2019.
Moved to Windows 11 and also installed VS2022.
Project opens and runs OK in VS2022.
However code has no intellisense and color. i.e. program.qs ...
- 11
1
vote
2
answers
161
views
Implementing the Oracle in Grover
I need your expert opinions/comments on this problem.
Suppose I have a database (say 16 entries), such that db[0] = 0.12, db[1] = 0.84, db[2] = 0.55, ..., db[15] = 0.91. I want the oracle to mark ...
- 51
0
votes
0
answers
84
views
Q# Grover Tutorial Problem
Referring to the Q# tutorial on Grover algorithm in https://docs.microsoft.com/en-us/azure/quantum/tutorial-qdk-grovers-search?tabs=tabid-visualstudio, I replicated the code exactly in Visual Studio ...
- 51
4
votes
1
answer
60
views
Missing types, namespaces, directives, and assembly references
I use VS Code for C# and Unity3D and TypeScript and <...
- 163
1
vote
1
answer
273
views
Q#/VS: No namespace with the name "Microsoft.Quantum.Canon" exists
I am trying to run a simple "Hello World" project in Q#, following this tutorial. I have completed the following steps (Step #s from tutorial link):
Step 1: Installed the latest version of ...
- 131
1
vote
3
answers
2k
views
Which quantum computing frame is suitable for optimization problems?
As in the computer world, not all programming languages are suitable for everything.
Php = Backend
Javascript = Frontend
Data Analsys/ML = Python
embedded systems = C
Mobilphone/apps = Android / Swift
...
2
votes
1
answer
151
views
Passing arrays to operations/functions in Q# Jupyter Notebooks
In order to pass inputs to Q# operations/functions with Jupyter Notebooks, one uses the magic command, %simulate, and writes out the inputs as key-value pairs, <...
0
votes
1
answer
125
views
Q# install issue
I have followed the instructions to install Q# using conda as recommended, and given by MS. When I try to import qsharp from my virtual env within a Python program, ...
1
vote
2
answers
131
views
Circuit to transform $|0\rangle$ into $\alpha|0\rangle + \beta|1\rangle$ for any $\alpha, \beta$
Hi I'm new to QC and doing some katas in Q#.
I got stuck on this excercise and would appreciate help:
Quantum circuit to get following state qubit: $\alpha|0\rangle + \beta|1\rangle$ when the input is ...
- 19
0
votes
1
answer
162
views
Things that I can compare between QDK and Qiskit
I am planning to write an article which compares QDK and Qiskit
Mainly talking about the different interfaces, and difference in running few algorithms
What all parameters should I compare and take ...
- 43
3
votes
1
answer
150
views
Quantum Katas - Tutorials - Oracles - Task 3.3 (OR oracle of all bits except for a single bit)
Let $x$ be an arbitrary state composed of $N$ qubits and $k$ be an integer such that $0\leq k \leq N.$
The task is to ignore the $k$-th bit and to flip the sign of $x$ if any of the remaining bits are ...
0
votes
1
answer
65
views
Quantum Katas - Tutorials - SingleQubitGates - Exercise 7 - Preparing an arbitrary state
Exercise 7 "Preparing an arbitrary state" from the Quantum Katas - Tutorials - SingleQubitGates asks to prepare a state $\alpha|0\rangle + e^{i\theta}\beta|1\rangle$, using parameters $\...
5
votes
2
answers
1k
views
Measuring entanglement entropy using a stabilizer circuit simulator
I'm trying to simulate stabilizer circuits using the Clifford tableau formalism that lets you scale up to hundreds of qubits. What I want to do is find the entanglement entropy on by splitting my ...
- 315
1
vote
1
answer
215
views
How to use QFT operation in Q#?
I see the QFT operation in the document given by Microsoft, but I don't know how to call it.
...
- 13
3
votes
1
answer
102
views
What all parameters can we take into account when comparing different quantum programming languages
I am planning to write a paper which compares Qiskit and Q# in the following circuits/algorithms
Bell circuits
Controlled swap to test similarity of two registers
Phase kickback between two qubits
...
- 43
1
vote
1
answer
139
views
Accessing tuple data in Q#
I am continuing my work on the SAT katas, but I thing I am missing something on the way the tuple data type works. In this example code, I am trying to access the data in a tuple type :
...
- 887
1
vote
1
answer
229
views
Take every second element of the array in Q#
Very quick question, I am trying to implement SAT solving in Q# using Grover's Algorithm. I want to take every second element from an array starting at the second element, represented with a range ...
- 887
5
votes
1
answer
152
views
Q# installation on Heroku
I'm trying to deploy a simple Quantum App written using Python on Heroku Server which is also using Microsoft's Q#, but getting the below error:
...
- 227
7
votes
1
answer
220
views
Q# Simulation Behavior
I am attempting to run a series of tests on a Q# program I'm running on the local simulator, but I'm not seeing any way to use >1 shot and collect the results of those shots at once, as in ...
- 153
1
vote
1
answer
35
views
Q# Callable Not Accessible from Open Namespace
I am trying to to call ApplyMultiplyControlledAnd(), and I'm receiving an error saying "The callable ApplyMultiplyControlledAnd exists in an open namespace, ...
- 153
1
vote
1
answer
146
views
Braket and Q# Simulators
I have implemented Shor's algorithm in Qiskit, and everything works as expected within the IBM Q experience for both the IBM qasm_simulator and real hardware. However, after I've implemented Shors in ...
- 153
3
votes
2
answers
65
views
Creating a resource count unit test in Q#
I want to create a unit test in Q# that runs an operation and asserts that it used at most 10 Toffoli operations. How do I do this?
For example, what changes do I have to make to the code below?
...
- 40.7k
1
vote
1
answer
166
views
Correctly configuring a Q# test project in Visual Studio Code
I have some Q# code which I'm editing using visual studio code. The codebase is divided into a src/ folder and a test/ folder. ...
- 40.7k