Tag: vqe

8 Is VQE a class of algorithms or a specific algorithm? 2019-10-24T15:22:43.307

8 Is there a mistake in the VQE Ansatz in Cirq's tutorial? 2019-11-06T08:57:33.393

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

6 Circuit for VQE Expectation Value Finding 2020-09-08T16:31:47.587

5 How to prepare Unitary Coupled Cluster ansatz for VQE in a circuit? 2019-12-03T10:28:55.437

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

4 How to explain that I get a value lower than the smallest possible through minimization procedure in VQE? 2019-12-08T20:41:38.690

4 Decomposing Hamiltonian into qubit model representation 2020-04-06T17:05:58.143

4 What's the point of VQE if classical computers can solve for eigenvalues easily? 2020-05-21T12:19:17.560

4 Resource recommendation on quantum simulations 2020-05-23T15:29:12.487

4 QUBO, Ising Hamiltonians and VQA 2020-10-11T17:36:51.753

4 Expected value in a VQE qiskit 2020-12-14T22:38:50.733

3 Active areas of research for NISQ algorithms 2019-11-20T05:48:19.700

3 Graph coloring to reduce the number of qubits in VQE 2019-11-22T14:27:49.923

3 Ansatz state for finding the lowest eigenvalue of a $2^n\times 2^n$ real matrix using VQE 2020-04-10T02:43:37.417

3 QAOA Belongs into VQE or the other way around? 2020-04-10T21:05:18.240

3 In which type of Hamiltonian does the ansatz need an entangler in VQE? 2020-04-16T07:52:34.833

3 VQE: Can I build a non-hermitian Hamiltonian with just Pauli matrices? 2020-05-25T17:21:18.083

3 Using Qiskit VQE for solving an eigenvalue problem 2020-12-02T20:00:23.350

3 Implemented QAOA returns wrong result 2021-01-05T02:30:16.220

3 implement variational quantum eigensolver with openfermion 2021-01-24T14:59:06.453

3 Ansatz explanation for VQE 2021-02-18T11:27:58.670

3 What does the identity operator represent when computing $\langle\varphi|I\otimes Z|\varphi\rangle$? 2021-02-22T15:53:12.030

2 What is a better ansatz for VQE? 2020-01-09T07:30:22.030

2 Modifying Qiskit Hamiltonian 2020-03-03T22:51:52.370

2 Finding optimal values of depth and max_trials parameters in vqe algorithm 2020-03-06T11:54:47.517

2 How to convert a qubit hamiltonian to QUBO and vice versa? 2020-04-18T07:02:57.137

2 How do I get intermediate values of VQE algorithm using callback? 2020-04-30T20:23:52.757

2 Creating a custom VariationalForm in Qiskit 2020-05-18T19:17:40.620

2 VQE jobs do not appear in queue 2020-07-20T12:51:59.303

2 What is the best way to handle parametric circuits in Qiskit? 2020-09-01T00:04:11.060

2 How to add several parameters in qiskit circuit? 2020-09-02T08:44:38.453

2 Wrong Expectation value when implementing a VQE for the Heisenberg Hamiltonian 2020-09-30T14:15:48.007

2 Why VQE gives an incorrect ground state energy for a chain of 4 hydrogen atoms? 2020-10-06T17:58:47.210

2 How to implement the Mixer of Quantum Alternating Operator Ansatz for Max-Independent-Set 2020-10-25T19:13:32.030

2 Measuring Pauli strings using generators 2020-10-26T19:12:20.837

2 TypeError: 'NumPyMinimumEigensolver' object is not subscriptable 2020-11-08T22:23:19.797

2 Decomposition of 2-qubit Hamiltonian into standard gate set for QAOA 2020-12-13T17:57:31.053

2 Is it possible to measure "aux_operators" in built-in VQE with backend "qasm_simulator" 2020-12-15T23:39:51.070

2 Callback function in VQE do not return the intermediate values of the parameters 2020-12-16T21:33:37.767

2 Run VQE for parametrized quantum circuit with ancilla qubits 2020-12-29T08:35:39.183

2 How to improve accuracy of ground energy values from a VQE 2021-01-13T16:15:18.507

2 Qiskit: getting QAOA expectation 2021-01-24T10:53:29.623

2 Simulation of a helium molecule using Qskit 2021-01-30T13:48:49.340

2 error when running VQE in Qiskit 2021-02-01T03:09:28.777

2 Calculating energy function with 1&2-RDM (reduced density matrix) in Qiskit 2021-02-01T15:40:42.020

1 Many jobs hanging after creating 2019-11-08T10:35:04.417

1 Circuit of a very trivial thing 2020-02-22T20:24:22.820

1 VQE with error dim. mismatch using qiskit.aqua.vqe 2020-02-28T16:19:41.897

1 Qiskit statevector_simulator returns different results 2020-02-29T12:05:06.693

1 VQE Cirq example 2020-03-13T02:31:07.697

1 What is the risk factor on IBM's portfolio optimization notebook? 2020-03-21T13:53:57.843

1 Cirq: easiest way to compute qubit Hamiltonian expectation value with number of shots 2020-03-25T19:12:36.050

1 Is there a limit to the size of problems that your simulators can run on Qiskit Aqua? 2020-04-28T22:57:08.987

1 SPSA max_trials 2020-05-08T16:35:35.330

1 VQE restart from a previous computation 2020-05-18T14:56:43.193

1 In which situations is it hard to find an ansatz? 2020-05-25T18:01:06.063

1 Changing the Basis 2020-08-25T20:35:36.073

1 How to build an ExpectationBase object? 2020-09-01T14:19:41.520

1 Examples of VQE on Qiskit 2020-09-02T11:08:02.960

1 How to construct Hamiltonian for combinatorial optimization problems and then convert into Pauli basis? 2020-09-18T11:13:37.307

1 Why is the lowest energy important to simulate a quantum system? 2020-09-20T11:50:04.537

1 In Variational Quantum Eigensolvers, what does "grouping Pauli operators into tensor products requiring the same post-rotations" mean? 2020-09-26T19:29:46.273

1 Why is local qasm simulation taking so long for VQE? 2020-09-27T22:25:11.967

1 On number of parameters and operators in UCCSD in qiskit 2020-09-28T05:14:11.753

1 Why is circuit inverse not working for EfficientSU2? 2020-09-28T08:38:59.070

1 Why is there a significant variation between the exact and VQE energy results? 2020-09-28T17:59:28.903

1 How to run VQE experiments on IBMQ Backends? 2020-09-29T20:06:35.823

1 Why do the qasm_simulator runtimes vary significantly for different IBMQ CouplingMap/NoiseModels? 2020-09-29T20:45:45.047

1 An effective way to submit all the jobs for VQE/QAOA at a time to an IBMQ machine? 2020-10-09T19:22:23.420

1 Why is the VQE insensitive to noise? 2020-10-13T19:27:01.830

1 How to use VQE function in Qiskit 2020-10-14T20:19:58.743

1 Intuition behind the construction of an ansatz circuit 2020-10-15T11:04:19.710

1 What are the main differences between the "unitary coupled cluster" and the "hardware efficient" ansatzes in VQE? 2020-11-17T13:12:03.170

1 Recording the time taken by a VQE to find ground state energy 2020-11-20T14:48:15.997

1 Increase maximum shots on IBM Hardware when running Quantum Variational Algorithms 2020-12-22T19:20:59.653

1 Applications of pauli operator grouping for simultaneous measurement in VQE 2020-12-28T09:57:32.983

1 In VQE, what ansatz would be best used for a maximally entangled $n$-qubit $H$? 2021-02-22T23:06:45.050

0 VQE for Beginners : Using Tutorial and Cirq 2020-04-11T02:24:04.093

0 Suppress deprecation warnings from Qiskit 2020-08-05T13:04:13.660

0 Unable to retrieve result for Job Error during VQE simulation 2020-08-26T17:10:12.387

0 XX and YY and ZZ Hamiltonians in vqe 2020-09-21T15:20:32.190

0 Why is the local qasm_simulator significantly slower than the statevector_simulator? 2020-09-29T15:43:35.940

0 How does VQE performs the measurement on a given Hamiltonian? 2020-10-15T11:55:31.697

0 Creating a parameterized Operator in Qiskit 2020-11-27T14:44:38.970

-1 Depth for UCC ansatz 2020-10-20T03:28:24.363