19 Explicit Conversion Between Universal Gate Sets 2018-08-31T10:02:20.183

16 How are gates implemented in a continuous-variable quantum computer? 2018-03-30T23:12:48.783

14 Given a decomposition for a unitary $U$, how do you decompose the corresponding controlled unitary gate $C(U)$? 2018-03-26T15:37:09.230

14 How many two-qubit gates are required to implement a general N-qubit unitary? 2019-06-18T09:22:35.527

13 How does approximating gates via universal gates scale with the length of the computation? 2018-03-19T23:00:47.297

13 What is the mathematical justification for the "universality" of the universal set of quantum gates (CNOT, H, Z, X and π/8)? 2018-03-23T19:56:19.330

13 How to prove/disprove universality for a set of gates? 2018-06-30T01:00:47.627

12 Quantum XNOR Gate Construction 2018-06-14T01:59:39.580

10 What would be the simplest addition that would make the D-Wave architecture universal? 2018-04-11T09:30:04.060

10 Shortest sequence of universal quantum gates that correspond to a given unitary 2018-05-13T14:09:15.530

10 Sampling random circuits vs Solovay-Kitaev compiler 2019-06-29T14:13:53.470

9 How can I see, without math, the action of a gate in matrix form? 2020-03-01T23:16:33.900

7 What are the fundamental differences between trapped ion quantum computers and other architectures? 2018-04-03T18:40:26.300

7 Quantum XOR Linked List Construction 2018-06-15T01:30:20.270

7 Why is Deutsch's gate universal? 2020-03-17T19:30:48.713

7 How to construct Deutsch's gate or $\pi/8$ rotations using Toffoli+Hadamard? 2020-04-27T17:31:47.973

6 Requirements for Achieving a Quantum Speedup 2018-04-11T10:12:04.333

6 Quantum Ripple Carry Adder Construction 2018-06-14T18:17:04.917

6 Is the quantum Fourier transform efficient if only one control-phase is allowed in the gate set 2019-06-16T15:53:32.987

5 How can I decompose a gate into $\{\mathrm{CNOT}, \mathrm{H}, \mathrm{P}(\theta)\}$? 2018-09-30T13:08:49.243

5 Reversible computation without inverting the circuit 2018-11-11T09:14:51.817

5 Can a Toffoli gate be implemented using Fredkin gates? 2019-12-27T14:35:39.600

5 Aproximating unitaries with elements from a t-design 2020-03-05T18:58:13.930

5 Is the universality of a qubit based quantum computer different from the universality of a continuous-variable quantum computer? 2020-10-16T07:32:46.677

4 Rewrite circuit with measurements with unitaries 2019-03-06T13:43:06.730

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

4 controlled-Z rotation gates in symmetrical fashion 2020-08-31T17:09:03.890

3 How to prove universality for a set of gates? 2019-04-10T17:16:28.963

3 What does a quantum circuit look like after qiskit.compile() has been applied? 2019-06-26T18:21:35.867

3 Why is the Toffoli gate not sufficient for universal quantum computation? 2019-11-24T14:40:37.187

3 Boson Sampling with a single beamsplitter 2019-11-26T14:40:37.593

3 Error bound on approximating arbitrary rotation gates 2020-03-23T16:04:17.113

3 Is $R_x$, $R_y$, $R_z$, and $CNOT$ a Universal gate set? 2020-03-29T23:30:53.463

3 What is the explicit action of the non-linear gate in CV quantum computing on the quadratures? 2020-05-02T00:11:59.997

3 Are Toffoli gates actually used in designing quantum circuits? 2020-05-08T13:49:35.907

3 Do all physical architectures for quantum computers use the same universal gate sets? 2020-06-11T11:49:44.800

3 Why do the constant operations in a quantum computer need second qubits? 2020-10-27T20:21:27.947

3 Error Propagation in quantum gates 2021-02-12T13:48:17.517

2 What quantum gate is XNOR equivalent to? 2018-10-01T01:00:52.683

2 What are the differences between the Toffoli and Fredkin gates (historical, practical, etc.) 2020-05-06T15:44:10.373

2 Is the gate-based model of QC universal? 2020-07-23T11:32:28.360

2 Understanding transversal gates for the 7 qubit steane code 2020-12-30T16:21:23.377

2 Fowler Distance in Solovay-Kitaev Algorithm 2021-02-11T14:25:37.343

1 How can I build a controlled gate for this matrix in qiskit? 2019-06-26T15:16:31.107

1 How to implement controlled u3 gate from Qiskit using simpler gates? 2019-07-23T20:31:07.087

1 Quantum Simulation Of Tunneling in Small System 2019-09-07T19:17:33.137

1 How can I prove the universality of this set of gates? 2020-04-13T15:10:24.040

1 How to construct a CU3 gate using only CX and U3 gates? 2020-05-06T18:52:05.840

1 Universality and coverage of irrational multiples of $2\pi$ In $[0, 2\pi)$ 2020-05-10T14:52:31.820

1 How do I create an inverse identity gate? 2020-11-24T07:31:58.783

1 What are the simplest examples of codes with transversal non-Clifford gates? 2021-01-02T13:57:04.480

0 How can I build up an arbitrary quantum circuit given a certain unitary matrix operation? 2020-01-20T14:15:06.057

0 Implementing U2-Gates on Cirq 2020-04-12T21:25:11.870

0 How can we code a ccz (control control z, equivalent of Toffoli on Z and not on X) gate in Qiskit language? 2021-02-27T23:55:42.837