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Quantum Computing : Recent Questions and Answers (Page 69)

Find answers to your questions about Quantum Computing or help others by answering their Quantum Computing questions.

Is there a general order finding quantum algorithm for a given a and N?

I'm trying to construct a general circuit for Shor's algorithm in Qiskit. I understood the later parts of the circuit (inverse QFT and QPE), but can't really understand the order...

Asked on 12/16/2020 by happy_sisyphus

2 answer

How do I build a gate from a matrix on Qiskit?

I'm creating a gate for a project and need to test if it has the same results as the original circuit in a simulator, how do I build this gate...

Asked on 12/16/2020 by Nillmer

5 answer

QPE example on Qiskit

I am learning to do QPE on qiskit. I wanted to choose a simple example to learn, and hence began with the state $|+rangle$ and operator $X$. I...

Asked on 12/16/2020 by srinivasa prasannaa

1 answer

Impact of ordering Hamiltonian terms for Trotterization

In Trotterization, the typical Hamiltonian considered is: $$ H = sum_{p, q} h_{pq} a^{dagger}_p a_q + sum_{p, q, r, s} a^{dagger}_p a^{dagger}_q a_r a_s $$ Which is then converted...

Asked on 12/15/2020

0 answer

Is Gaussian boson sampling (used for showing quantum advantage) a subcategory of the continuous variable approach?

I read about the photonic QC Jiŭzhāng that showed quantum advantage by Gaussian boson sampling. I read that boson sampling itself is a sub-universal technique of QC...

Asked on 12/14/2020

0 answer

How to measure a quantum circuit's execution time on a real IBM device?

I am executing a quantum circuit on an IBM quantum device and I need to start a timer as soon as the job in the queue starts running. I have...

Asked on 12/14/2020 by Alfred

1 answer

Measurement of 1 qubit in a two qubit system

I created two qubits in IBM quantum experience and measured the second qubit without applying any gate.The result I...

Asked on 12/13/2020

3 answer

What exactly makes quantum computers faster than classical computers?

What feature of a quantum algorithm makes it better than its classical counterpart? Are quantum computers faster than classical ones in all respects?...

Asked on 12/13/2020 by Tobias Fritzn

1 answer

How to construct Control-Z with square root of swap?

How to construct Control-Z with square root of swap(up to some single qubit operations)? In some papers it just directly mention that it's possible but didn't tell how to do....

Asked on 12/12/2020 by Dingshan Liu

2 answer

How do you embed a POVM matrix in a Unitary?

In QuantumKatas Measurement Task 2.3 - Peres-Wooter's Game, we are given 3 states A,B and C.We construct a POVM of these states. But how do we...

Asked on 12/12/2020 by vasjain

1 answer

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