# Tag Info

### Converting data into a SHA256 hash using Qiskit quantum computer

There is no current implementation of SHA256 in Qiskit. Reasons for that include: its implementation could be rather complicated, including a large number of ancilla qubits; it would require a huge ...
• 2,426
Accepted

### What is $j$ in the state $|\psi\rangle=\sqrt{(1-p)}|0\rangle + e^{j\phi}\sqrt{p}|1\rangle$?

Yes, $j$ is just the imaginary number $i$. The use of $j$ comes from the world of electrical engineers who use it instead of $i$ so there is not confusion with notation for current which is already ...

### Can I Convert a Qubit in complex form to polar form?

In polar form we have, $\alpha_1 + i\alpha_2 = r_1e^{i\phi_1}$, and $\beta_1 + i\beta_2 = r_2e^{i\phi_2}$ So, |\psi\rangle = r_1e^{i\phi_1} |0\rangle + r_2e^{i\phi_2} |1\rangle = e^{i\phi_1}(r_1 |0\...
• 4,010

### Can I Convert a Qubit in complex form to polar form?

Yes, if you can accept that states are equivalent up to a global phase. The second equation assumes that the $|0\rangle$ coefficient is real. We can fix the first equation by adding a global phase so ...
• 246
Accepted

### Iterative quantum phase estimation - real device

Dynamic circuit capabilities (eg., circuits with control flow) are not yet supported by production IBM hardware. These capabilities will be coming later in 2022 to select devices as per the IBM ...
• 636

### How are IBM's 127 qubits more potent than the 5760 qubits D-Wave - Advantage_system6.1?

As the other answers have stated, they're two substantially different systems that are unfortunately both marketed as quantum computers. D-Wave is more specifically a quantum annealer. At a high level,...
• 186
Accepted

### How are IBM's 127 qubits more potent than the 5760 qubits D-Wave - Advantage_system6.1?

They are different kinds of quantum computers: The D-Wave is a quantum Annealer. A rather specific (non-general purpose) device that can solve QUBO-type problems. IBM offers universal gate-based ...
• 455

### How are IBM's 127 qubits more potent than the 5760 qubits D-Wave - Advantage_system6.1?

My understanding isn't as deep, but those are two different quantum hardware systems. IBMs system is a gate based one, akin to a normal CPU. The d-Wave one is a Quantum Annealing system, that isn't ...
• 147
Accepted

### Understanding the output of a Deutsch-Jozsa circuit

After the application of the Hadamard sandwitch along with the intermediate oracle, as explained here, \$\begin{aligned} \lvert \psi_3 \rangle & = \frac{1}{2^n}\sum_{x=...
• 160

### Understanding the output of a Deutsch-Jozsa circuit

In the Deutsch-Jozsa algorithm, if the function is constant, you are guaranteed to get the outcome 000...0. If the function is balanced, you are guaranteed not to get the answer 000...0. Since you got ...
• 46.2k

### Qiskit library.gaussian() does not accept parametric expression

Just change library.gaussian to become library.Gaussian with capital G. Qiskit Pulse contains both ...
• 4,010
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 ...
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 ...

### 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 ...
• 4,010

### 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 ...
• 365
1 vote

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 ...