Tag: qiskit

23 How can I implement an n-bit Toffoli gate? 2018-05-28T20:50:23.917

15 How do I build a gate from a matrix on Qiskit? 2018-12-16T17:13:17.150

12 How is the Grover-Algorithm applied to a database? 2019-03-14T00:48:08.470

11 Composing multiple quantum circuits in single quantum program in QISKit 2018-06-05T14:22:02.553

11 What is a "barrier" in Qiskit circuits? 2019-09-30T17:10:29.583

10 Submitting jobs to IBM devices without Python 2019-01-10T22:46:55.327

9 Quantum algorithm for linear systems of equations (HHL09): Step 2 - Preparation of the initial states $|\Psi_0\rangle$ and $|b\rangle$ 2018-06-24T07:08:52.883

9 Does conditional gate collapse controller's superposition? 2018-07-19T23:07:15.527

9 How to program a controlled Hadamard-Hadamard gate? 2019-06-13T03:19:25.203

8 There was an error in the circuit!. Error = 'QISkit Time Out' 2018-03-21T13:37:14.543

8 How to delete pending jobs on IBM Quantum Computer to retrieve units? 2018-05-19T18:56:31.730

8 Visualization of Quantum Circuits when using IBM QISKit 2018-05-31T02:58:10.137

8 Changing indices of qubits in QISKit 2018-06-15T11:23:18.600

8 Construct Controlled-$G^{\dagger}$ from known Controlled-$G$ 2018-06-26T07:34:08.697

8 Phase-Shift Gate in Qiskit 2018-06-26T16:52:18.747

8 Why do we need a Classical Register for carrying out Quantum Computations? 2018-08-19T08:44:02.790

8 Qubits specification on IBMQ devices 2018-10-30T02:47:15.883

8 How to quickly calculate the custom U3 gate parameters $\theta, \phi$ and $\lambda$ for any unitary? 2019-05-26T02:35:17.127

7 How to create an arbitrary state in QISKit for a local_qasm_simulator? 2018-03-28T19:39:49.517

7 Why does job.running in QISKit output False, even if the job is still running? 2018-05-14T13:19:53.713

7 One-qubit gate results in QISKit 2018-06-24T21:23:36.790

7 What are theta, phi and lambda in cu1(theta, ctl, tgt) and cu3(theta, phi, lam, ctl, tgt)? What are the rotation matrices being used? 2018-07-11T11:04:36.873

7 SWAP gate(s) in the $R(\lambda^{-1})$ step of the HHL circuit for $4\times 4$ systems 2018-07-12T21:32:29.900

7 What is the purpose of the TDG gate in QISKit? 2018-07-19T19:03:33.407

7 How does measurement calibration work? 2019-05-17T10:46:07.143

7 How to calculate the fidelity of a certain gate of a IBMQ device in Qiskit using randomized benchmarking/tomography? 2019-06-04T17:50:28.553

7 Is it possible to run a general implementation Shor's algorithm on a real IBM quantum computer at least for N = 15? 2019-09-27T18:05:12.787

7 Quantum circuit to implement matrix exponential 2020-03-28T10:25:45.057

7 Would IBM's "compiler" turn my identity circuit into nothing? 2020-08-17T03:10:07.640

7 If quantum computing always return random measurement (or uncertain measurement), why do we still need it? 2021-01-25T15:35:38.043

6 How would one implement a quantum equivalent of a while loop in IBM QISkit? 2018-09-23T02:43:29.647

6 Status of software packages for quantum compiling 2019-01-09T20:19:45.323

6 Defining qubit operator from scratch 2019-06-03T08:03:23.507

6 What does fidelity mean? 2019-07-11T12:29:41.913

6 How to calculate an Expected Value of some operator acting on qubits? 2019-08-04T12:05:06.087

6 What is the location of the Qiskit config file? 2019-11-06T19:03:25.247

6 Why is the order reversed on measurement? 2019-11-21T21:23:34.287

6 How to draw Qiskit's HHL algorithm as a circuit? 2019-11-25T16:43:56.760

6 XOR gate for n control qubits in qiskit 2020-06-15T15:51:05.200

5 What is Qconfig in QISKit and how do I set it up? 2018-05-15T10:12:46.183

5 Checking value of variable using quantum approach 2018-07-01T13:05:29.973

5 Is there a common set of modules for user-defining-quantum-gate for QISKit 2018-07-11T17:52:42.857

5 Quantum SVM Algorithm Error on import 2018-07-17T04:45:38.733

5 How to create a condition on only one classical bit when we have a total of 2 classic bits in the system 2018-09-20T10:32:45.643

5 Entanglement state preparation by using amplitude values 2018-09-26T14:35:47.727

5 Introspecting quantum circuit execution on Qiskit Aer simulators 2018-12-29T09:16:01.983

5 Quantum algorithm for linear system of equations (HHL) - Final Step: How can I find my vector of solution $|x\rangle$? 2019-03-05T10:41:53.807

5 Graphing the decoherence of qubits being used to perform an algorithm 2019-04-11T02:18:53.060

5 Controlled unitary from the HHL algorithm – practical implementation using Qiskit 2019-04-17T08:31:27.053

5 Transform matrix into a combination of simple quantum gates 2019-05-22T01:11:14.637

5 Get result measurement into a circuit with Qiskit 2019-06-14T15:03:24.860

5 How to parallelly run a quantum circuit on IBMQ? 2019-10-28T08:10:41.373

5 Understanding quantum teleportation algorithm from qiskit tutorials 2019-12-02T11:16:24.423

5 Getting a layout for qubits in Qiskit 2019-12-04T18:22:24.173

5 What does the error rate on the IBMQ website mean? 2019-12-05T08:54:06.130

5 How to implement the CCH gate in quantum computers available in clouds? 2020-01-05T09:38:42.050

5 How to run a qasm file on IBMQ device? 2020-01-29T19:48:33.960

5 How to make circuit for n-control Z gate( i.e $C^3Z$ )? 2020-05-09T19:06:00.247

5 How to not optimize the quantum gates in a qiskit circuit when running it in the real device? 2020-06-06T11:54:21.373

5 Representation of rotation operators $e^{-i\theta(I-Z_1\otimes Z_2 \otimes Z_3)}$ about arbitrary axis for $3$ qubits 2020-06-20T23:14:21.420

5 Is there a general order finding quantum algorithm for a given a and N? 2020-07-30T07:04:33.907

5 Qiskit Portfolio Optimization Application 2020-08-12T03:25:51.103

5 Can I partially collapse the wavefunction in Qiskit? 2020-10-27T18:27:08.487

5 What's meant by the depth of a quantum circuit? 2020-11-01T06:48:32.570

5 Qubit Connectivity of IBM Quantum Computer 2020-12-08T07:47:51.290

4 Comparing run times on IBM Quantum Experience 2018-07-30T15:07:51.117

4 How to install qiskit in spyder editor? 2018-09-11T10:31:58.767

4 How to deal with -LookupError: backend "ibmqx4" is not found? 2018-09-12T07:47:12.397

4 Qiskit - expand and/or merge registers 2018-12-20T19:20:22.997

4 How can noise on a device be simulated using measured noise parameters? 2019-01-07T13:17:03.400

4 Can I remove gates from a QuantumCircuit? 2019-01-08T17:51:00.630

4 Deprecation warnings in Qiskit (circuit drawing) 2019-01-25T14:11:32.867

4 ImportError: cannot import name 'QuantumProgram' from 'qiskit' 2019-01-28T11:27:24.860

4 Qiskit - How do we measure the same single qubit system multiple times while also getting the counts/results after each measurement? 2019-02-07T22:06:11.787

4 How can I express controlled unitary operation in QPE of this implementation of HHL? 2019-06-05T15:44:25.023

4 Results from looped experiments on IBM Q different than individual experiments 2019-06-05T17:20:14.000

4 About the Qiskit draw function 2019-06-06T14:40:54.490

4 How to upload .py file to new online Qiskit Notebook 2019-07-02T21:02:17.967

4 How do I get out 2 measurements from the same execution on Qiskit? 2019-07-05T16:39:31.733

4 How to create an Ising coupling gate with Qiskit? 2019-07-14T11:25:56.153

4 Access results from an experiment without having to run the script again 2019-08-29T07:41:36.717

4 Overview of Cirq, qiskit, q#, ibmq(circuit board), other 2019-09-11T03:15:59.333

4 How to plot custom gate labels in Qiskit? 2019-09-27T21:13:34.437

4 Is there a way to develop a multiple controlled X or Z gate on Qiskit without using ancillary qubits? 2019-10-08T02:29:43.983

4 How many ancilla qubits to use with Multiple-Control Toffoli (mct) gate in Qiskit? 2019-10-11T19:40:04.943

4 `execute()` hangs and eats memory 2019-10-14T14:49:25.833

4 Resources in Spanish to start learning quantum computing and quantum programming (Qiskit) 2019-10-15T03:56:19.157

4 How to prepare a specific initial state of three qubits? 2019-10-17T08:43:46.387

4 Problem with measurement error mitigation using VQE 2019-11-01T21:40:18.880

4 Vary parameter between shots 2019-11-25T04:48:47.583

4 How good is basic_device_noise_model() simulating the noise in the quantum computer? 2019-11-26T19:32:34.523

4 How to implement if statement based on measurement results in qiskit? 2020-01-02T04:25:37.230

4 Use Qiskit in other programming languages (C#, JavaScript and Lua) 2020-01-13T09:45:11.333

4 How to use external .csv data file in quantum support vector machine qiskit python code? 2020-02-24T15:24:51.197

4 How to read the elements of a circuit in qiskit? 2020-02-26T14:45:01.990

4 Qiskit - Z expectation value from counts? 2020-04-04T22:37:04.420

4 What are the differences between the different transpiler optimization levels in qiskit 2020-04-11T18:23:52.967

4 What is the relationship between Choi and Chi matrix in Qiskit? 2020-05-02T15:01:23.973

4 Deutsch's algorithm in Qiskit 2020-05-04T16:10:31.040