5 votes
Accepted

When using Qiskit's plot_bloch_vector function, how can I set colors for vectors?

A simple way to do that is by using Bloch class[1] directly which accepts a list of vector colors to cycle through: ...
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3 votes

How do I use the quantum searching algorithm to loop search through a datafile in qiskit?

Currently the state of quantum computers is not advanced enough; while you can run Grover's algorithm on the existing quantum computers, you will not be able to benefit from this in the problem you're ...
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  • 365
3 votes

How does a quantum computer find the correct password faster than classical computers using brute-force?

In the setting you described we cannot use a Quantum Computer to benefit us. But if we are able to somehow perform the password check itself within a quantum computer, then Grover's algorithm gives us ...
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  • 365
2 votes

AWS Braket Backend for Qiskit?

qbraid does! qbraid has a transpiler for Qiskit <> Braket <> Pennylane (QNodes) <> Cirq <> Pyquil which is also backend compatible. You'll have to sign up to access the SDK ...
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2 votes

Can one reset a qubit to the ground state on real IBM quantum processor?

As @KAJ226 said in his answer, some of IBM quantum systems support Reset operation. You can check whether some backend supports Reset as follows: ...
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2 votes

Can one reset a qubit to the ground state on real IBM quantum processor?

Yes, as pointed out by this tutorial here: Mid-Circuit Measurements Tutorial In particular they showed an example of single qubit reset on ibmq_manhattan
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  • 12.3k
2 votes

How do I use the quantum searching algorithm to loop search through a datafile in qiskit?

i heard a quantum algorithm can search through a list much more quickly than an algorithm limited by the plodding pace of classical physics Grover's algorithm, also known as the quantum search ...
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1 vote

Question about mock backends!

According to Qiskit documentation: Note, that these automatic models are only an approximation of the real errors that occur on actual devices, due to the fact that they must be build from a limited ...
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1 vote
Accepted

How is the ket of a quantum state calculated in this code?

In case the bra-ket notation is new to you, the calculations are fairly basic linear algebra. Your starting state is the tensor product $$(q_0)_{init} \otimes (q_1)_{init} = \vert 0\rangle\otimes\...
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1 vote
Accepted

Qiskit compute mean expectation value

Yes, StateFn(Bitstring) is a valid usage of qiskit in terms of StateFn("0101")=$\left|0101\right\rangle$. As an ...
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  • 1,626
1 vote
Accepted

split_dataset_to_data_and_labels in qiskit not working correctly

Qiskit Aqua (now deprecated) contains the function ad_hoc_data[1] which returns ...
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1 vote

Unable to import split_dataset_to_data_and_labels and map_label_to_class_name in qiskit

To fix this issue, required code needs to be copied and applied in python from-: https://github.com/Qiskit/qiskit-aqua/blob/main/qiskit/aqua/utils/dataset_helper.py This is based on Egretta.Thula's ...
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1 vote

No module named 'qiskit.optimization' on Google Colab

Run !pip install qiskit-optimization to install it and import it as qiskit_optimization. Read more about the framework on the ...
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  • 2,576
1 vote

Generating a random 32-byte hex integer using Qiskit

A binary string can be converted into other formats such as decimal, octal and as you require, hexadecimal. As you have already mentioned, you need a 256-bit key. So you can replicate the same method ...
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1 vote
Accepted

Generating a random 16-digits in a superposition state using Qiskit

You need $\lceil d\log_2(10)\rceil$ qubits to store a $d$ decimal digits number. So you can generate a superposition state of binary representation of a 16 decimal digits number using the following ...
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1 vote
Accepted

Why Qiskit doesn't invert hard coded unitary matrix?

So I have finally have the time to check up with what I wrote in the comment, and what I commented is indeed the case. If I passed in the matrix $U = \begin{pmatrix} 1 & 0 & 0 & 0\\ 0 &...
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  • 12.3k
1 vote

Why is the combination of NTRU Prime and X25519 ECDH in OpenSSH believed to be secure against quantum attacks?

Before I address your question, I'll mention that the security of a cryptosystem in theory is not really the same as the security of a cryptosystem in practice. The specific reasons why NTRU is ...
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1 vote

Bernstein Vazirani Algorithm widget (bv_widget) in the Qiskit documentation

With qasm simulator with qiskit and the inner-product quantum oracle (parameterized by the secret bits and leveraging the phase-...
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1 vote

Qiskit sample - Portfolio optimization

Well you can fix it also. Like if you want to take 3 assets. THEN TAKE BUDGET=3. [BUDGET IS THE NO OF ASSETS U WANT TO SELECT OUT OF TOTAL ASSETS(num_assets)] Now your number of assets can be 5, 10, ...
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1 vote

Question About How Qiskit Reset Gate Affects Other Entangled Qubits

'Internally, these reset instructions are composed of a mid-circuit measurement followed by an x-gate conditioned on the outcome of the measurement.' As I understand it, the reset will collapse the ...
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