# Questions tagged [quantum-algorithms]

For questions about quantum algorithms, that is, sequences of quantum gates, operations, and measurements, whose purpose which achieve some goal. Standard examples are Shor's and Grover's algorithms.

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### VarQITE from scratch: troubles understanding the Variational Quantum Time Evolution (VarQTE) algorithm from Qiskit

At the moment I am trying to implement variational imaginary time evolution in Pennylane from scratch. To get a feeling if it works, I compare the results of my own implementation with the solutions ...
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1 vote
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### Numerical values for the volume of qubits

This paper mentions the volume of qubit in equation (9) given by: $$Q_0=U*C_1*T_o*n_p^{(2/3)}*(v_q)^{(2/3)}$$ where $Q_0$ is the heat entering the chamber $U$ is the heat transfer coefficient $C_1$ ...
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### Custom Quantum Gate equivalence to backend basis gate set

Hello I am using Qiskit and I have defined a custom gate which implements the array shown in the image: This array is unitary and the function R(theta) works by tuning a continious variable into 0 of ...
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### Majorana representations of Spin 1/2 operators [closed]

I came a cross majorana fermions and try to simulate hubbard model with them. However, I could not figure out how to represent or take the information of spin up and down information out of them. you ...
1 vote
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### What is the measurement algorithm that the PyClifford's authors used?

I am studying how to perform measurements on pure stabilizer states of the Pyclifford package. The author used the convention to represent stabilizer states the same as in the paper: Improved ...
41 views

### Turning Deutsch-Josza into a continuous problem

I am wondering whether anyone has investigated if there is a notion of a continuous oracle. My starting off point is to consider the Deutsch-Josza problem, in which the oracle acts on the state in a ...
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### Unable to extract the quantum registers information from qiskit quantum circuit data

Consider the following code: ...
249 views

### What problems in chemistry or materials science could be solved with 100 fault-tolerant qubits?

Background IBM, Infleqtion, QuEra, and other quantum hardware companies have announced roadmaps where they expect to have 100 or more fault-tolerant qubits by the end of the decade. It seems ...
1 vote
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### Can we use inverse transform sampling in probability loading process of quantum computing?

Recently, I read some papers about Quantum Monte Carlo (QMC), which can speed up the classical Monte Carlo quadratically. However, the efficiency of QMC largely depends on the probability loading ...
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