# Tag Info

1

One way that I've found that works pretty well is to define a new UDT for options, and then provide a function that returns a reasonable set of defaults. For instance, in the case you gave, you might have something like: newtype FunOptions = ( N : Int, SomeOtherOption : Double[] ); function DefaultFunOptions() : FunOptions { return (0, [0.0]); } ...

3

An application of the reflection operator change each amplitude of a basis state $|i\rangle$ by $$\alpha_i \rightarrow- \alpha_i + 2 \langle\alpha\rangle\$$ where $\langle\alpha\rangle\$ is the average of all amplitudes. It follows the oracle which is use to "mark" the seeked elements $|i\rangle$. Say for instance that you have 8 elements, so you ...

2

According to the openqasm spec the include statement will insert the contents of the files with the name relative to the current working directory: https://github.com/Qiskit/openqasm/blob/master/spec/qasm2.rst#language If you're using qiskit-terra as your parser this should work unless you name the local file "qelib1.inc". The parser included in the qiskit-...

2

Not at the moment. As of version 0.10, Q# doesn't support optional parameters, and it does not allow to define two operations with the same name that would only differ by the list of parameters (which would be a different way to do the same thing).

3

Q# operations are compiled into C# classes. To define a C# implementation for a Q# operation, you will need to do the following steps: Define a Q# operation with empty or intrinsic body CSharpMethod. Define a C# class that implements the abstract class into which your Q# operation gets compiled, something like public class CSharpMethod_Impl : CSharpMethod. ...

1

So Qiskit (qiskit.org) already does everything you are looking for. If you need to access the API directly then the IBMQ account connector (https://github.com/Qiskit/qiskit-ibmq-provider) is a good starting point in lieu of formal documentation.

0

In case you were able to design an oracle for right door identification (I am not sure how to do so), you would apply Grover algorithm

0

IBM offers online access to their quantum computer to test quantum programs. Here is the link: https://www.ibm.com/quantum-computing/technology/experience. You can use the portal to check your programs by running them on an actual quantum computer.

2

From what I know, no testing framework exists yet for quantum computing. I searched approximately one year ago for one and did not find anything. But this does not mean you can't test! Below are the methods I ended up using when I saw that no specialised testing framework for quantum computing was out there in the wild. Unitary simulation This method can ...

3

On hardware, the number of moments is the relevant metric. That is why cirq focuses on that. To compute circuit depth in cirq, create a new circuit using just the operations. It defaults to packing them as tightly as possible, so the number of moments will be the depth. depth = len(cirq.Circuit(my_circuit.all_operations()))

2

I take your statement that programmers "don't need to know the machinery behind the prevailing paradigm" to mean that most scientific programmers need not know how a $\mathsf{NAND}$ gate is realized, with, say, a set of $6$ or so transistors. However, probably a concept that is fundamental in quantum computing, that can be understood by anyone familiar with ...

5

Prepare a qubit in state $|\psi\rangle=\mathrm{cos}\frac{\theta}{2}|0\rangle+\mathrm{e}^{i\phi}\mathrm{sin}\frac{\theta}{2}|1\rangle$, given the angles $\psi$ and $\theta$. Let's start with a qubit in the $|0\rangle$ state, as is customary for Q#. You can use one of the general library operations to prepare the state, such as PrepareArbitraryState. Or you ...

0

I think the code example closest to what you're looking for is task 1.4 of the Teleportation kata which gives the learner three qubits (the message qubit and the pair of qubits that Alice and Bob will entangle and share before teleportation) and asks them to transform the Bob's qubit into the message state. You'll notice that the test for this task doesn't ...

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