All Questions
Tagged with ibm-quantum-devices quantum-gate
19
questions
2
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1
answer
567
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Can IBM Quantum hardware handle any CSWAP at all?
I am designing quantum algorithms where the quantum circuit uses CSWAP gates a lot. The result is very noisy on the quantum hardwares. So I designed really simple circuits to test whether it is indeed ...
- 121
1
vote
1
answer
61
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IBM quantum computer backend cycle time and real gate duration
I am new to dynamical decoupling and is trying to study this from qiskit: https://docs.quantum.ibm.com/api/qiskit/qiskit.transpiler.passes.PadDynamicalDecoupling . There, they are specifying the ...
- 33
6
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0
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50
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Resources on the energy consumption of IBM quantum computers?
I am seeking information regarding the energy consumption of IBM Quantum Computers, specifically inquiring about the energy requirements associated with individual gate operations.
Could you also ...
1
vote
1
answer
68
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How does error accumulate when entangling two distant qubits with limited connectivity?
My goal is to minimize accumulated error when entangling two qubits that cannot be entangled via a single native two qubit gate operation.
I have a coupling map/graph for the qubits of an IBM quantum ...
- 143
2
votes
0
answers
42
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Exploiting virtual-$Z_{\theta}$ corrections in QEC
The work done by IBM Researchers to perform virtual-$Z_{\theta}$ gates allowed them to:
achieving zero-time relative phase shifts;
correcting $Z_{\phi}$ errors occurring when applying some gates -- e....
- 1,998
0
votes
1
answer
213
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problem with parametrized circuits
I used a circuit with one parametrized gate U(theta, phi, lambda), than I fixed the parameters with qc.bind_parameters and it's worked well. But the only step that don't work is the execution in a ...
4
votes
1
answer
510
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How the real IBM quantum computers apply arbitrary Rz(θ) gate rotation? [closed]
I want to ask the following questions:
(1) The basis gate set of IBM quantum computers is { Id, Rz(θ),√X, X, CNOT, reset}. Somebody said that IBM didn’t really apply Rz(θ) gate on the machine. The ...
- 95
4
votes
1
answer
147
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Can the ancilla for Qiskit's mcx with mode="recursion" be dirty?
I think their implementation is close to the one from here which does use a dirty ancilla, but I just want to make sure
- 585
2
votes
2
answers
67
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Strange behaviour of IdentityGate IGate in IBM Q Composer
Can anyone explain the strange impact of the IGate in the enclosed quantum teleportation setup in view of the computational basis states? Any help is welcome!
- 21
4
votes
1
answer
166
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CNOT error rate of 1 in IBM backends
I have noticed that some CNOT gates (for instance, between qubits 1 and 2 in ibmq_casablanca) display an error rate of 1 while typical error rates are of course ...
- 43
1
vote
1
answer
201
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Why is a 15-qubit IBM quantum computer not working correctly?
I just wanted to implement an algorithm for adding two 2-bit binary numbers. And it works, but only on an IBM 32-qubit simulator. And on a real 15-qubit computer, ibmq_16_melbourne, it produces very ...
- 471
11
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2
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3k
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Characteristics of the IBM quantum computer
On the IBM Quantum Composer website, there are characteristics of qubit computers. For example, ibmq_16_melbourne.
But there is no description anywhere of what:
...
- 471
2
votes
1
answer
182
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Qiskit: 3 applications of identity with arbitrary SU(2) is universal?
We know that the CNOT gate together with arbitrary SU(2) gates can be used to perfectly implement arbitrary SU(4) gates with 3 applications of the CNOT.
I am using the Qiskit library and testing how ...
- 151
4
votes
2
answers
2k
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Where is CZ gate in IBM Quantum circuit composer
I am trying to build the Grover circuit using the IBM Quantum Composer circuit composer. The Grover example has a CZ gate. I can't find that gate in circuit composer.
- 41
1
vote
1
answer
94
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Mechanism of measurement in IBM quantum devices
I am trying to find out about the mechanism of measurement in IBM Q devices. To be specific, if I apply two Hadamard gates on the first qubit and identity on the second then is it possible to ...
- 79