User Craig Gidney

15 votes

0 answers

293 views

Reference that explains how to read 3d topological diagrams for surface code computations

asked Jan 27, 2019 at 8:41

12 votes

1 answer

297 views

Simulating Clifford + few-T circuits

circuit-construction simulation

asked Apr 17, 2018 at 1:17

10 votes

1 answer

282 views

Minimum number of CNOTs for a 4-qubit increment on a planar grid

optimization nisq

asked Aug 7, 2018 at 22:28

10 votes

3 answers

630 views

Is there a simple rule for the inverse of a Clifford circuit's stabilizer table?

pauli-gates clifford-group

asked Sep 24, 2018 at 2:13

10 votes

1 answer

277 views

Minimum number of T gates needed to perform two overlapping Toffolis

circuit-construction

asked Jun 11, 2021 at 21:16

9 votes

4 answers

685 views

Minimum number of CNOTs for Toffoli with non-adjacent controls

circuit-construction gate-synthesis optimization

asked Aug 7, 2018 at 5:35

9 votes

2 answers

341 views

If Majorana qubits are analogous to surface codes, why do the diagrams use lines instead of squares?

error-correction surface-code majorana-particle

asked Feb 21 at 18:28

8 votes

2 answers

4k views

What is the matrix of the iSwap gate?

quantum-gate matrix-representation

asked Jul 3, 2018 at 21:50

8 votes

2 answers

745 views

Expected repetitions of the quantum part of Shor's algorithm

algorithm shors-algorithm

asked Dec 13, 2018 at 0:42

8 votes

2 answers

268 views

Fast way to check if two state vectors are equivalent up to Pauli operations

pauli-gates

asked Feb 10, 2019 at 23:17

7 votes

1 answer

300 views

Is the diamond norm subadditive under composition?

trace-distance diamond-norm

asked Aug 17, 2019 at 13:38

7 votes

1 answer

264 views

Is Toffoli a fault tolerant transversal gate of the repetition code on bit-flip-error-only qubits?

quantum-gate error-correction

asked Nov 25, 2021 at 18:32

6 votes

2 answers

179 views

Simulating flag qubits and conditional branches using Stim

programming error-correction stim

asked Dec 14, 2021 at 21:51

6 votes

3 answers

104 views

Simulator-dependent implementations in Q#

programming q#

asked Nov 16, 2020 at 3:38

6 votes

1 answer

83 views

What is the quantum bandwidth of a planar array of noisy qubits, assuming free classical communication?

communication surface-code

asked Nov 18, 2018 at 2:33

5 votes

2 answers

133 views

How do I produce circuit diagrams from a Q# program?

programming q#

asked Dec 28, 2018 at 23:34

4 votes

1 answer

208 views

How do I write functions that modify operations in Q#?

programming q#

asked Dec 29, 2018 at 4:06

4 votes

1 answer

145 views

How do I name the adjoint of an operation in Q#?

programming q#

asked Dec 29, 2018 at 16:38

4 votes

3 answers

193 views

Does Q# have a bigint type?

programming q#

asked Jan 1, 2019 at 2:11

4 votes

1 answer

621 views

How many N-qubit stabilizer states are there?

stabilizer-state

asked Apr 30, 2020 at 20:17

4 votes

1 answer

131 views

Performing a generic single-qubit Pauli error channel in stim

programming stim

asked May 11, 2021 at 0:39

4 votes

1 answer

337 views

Given a $|W_8\rangle$, perform a CCCZ using stabilizer operations

circuit-construction stabilizer-state magic-states

asked Dec 5, 2021 at 9:34

3 votes

1 answer

61 views

How do I initialize stim's tableau simulator to a random tableau?

stim

asked Jan 4 at 22:54

3 votes

2 answers

53 views

Creating a resource count unit test in Q#

programming q#

asked Nov 27, 2020 at 0:08

3 votes

1 answer

117 views

How do I get a list of control qubits from Q# operations when tracing the simulation in C#?

programming q#

asked Jan 9, 2019 at 22:37

3 votes

1 answer

84 views

cirq.Ry complains that it needs one argument

programming cirq

asked Oct 22, 2019 at 23:24

3 votes

1 answer

73 views

How do I do printf debugging in Q# in a convenient way?

programming q#

asked Apr 8, 2019 at 20:19

3 votes

1 answer

259 views

Deriving a state vector from a stabilizer state's generators

superposition stabilizer-state

asked Jun 11, 2019 at 17:42

2 votes

1 answer

173 views

How do I multiply an integer and a double in Q#?

programming q#

asked Dec 30, 2018 at 3:18

2 votes

1 answer

79 views

Programmatic access to wavefunction in Q# for tests

programming q#

asked Dec 29, 2018 at 3:41

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37 Questions

Reference that explains how to read 3d topological diagrams for surface code computations

Simulating Clifford + few-T circuits

Minimum number of CNOTs for a 4-qubit increment on a planar grid

Is there a simple rule for the inverse of a Clifford circuit's stabilizer table?

Minimum number of T gates needed to perform two overlapping Toffolis

Minimum number of CNOTs for Toffoli with non-adjacent controls

If Majorana qubits are analogous to surface codes, why do the diagrams use lines instead of squares?

What is the matrix of the iSwap gate?

Expected repetitions of the quantum part of Shor's algorithm

Fast way to check if two state vectors are equivalent up to Pauli operations

Is the diamond norm subadditive under composition?

Is Toffoli a fault tolerant transversal gate of the repetition code on bit-flip-error-only qubits?

Simulating flag qubits and conditional branches using Stim

Simulator-dependent implementations in Q#

What is the quantum bandwidth of a planar array of noisy qubits, assuming free classical communication?

How do I produce circuit diagrams from a Q# program?

How do I write functions that modify operations in Q#?

How do I name the adjoint of an operation in Q#?

Does Q# have a bigint type?

How many N-qubit stabilizer states are there?

Performing a generic single-qubit Pauli error channel in stim

Given a $|W_8\rangle$, perform a CCCZ using stabilizer operations

How do I initialize stim's tableau simulator to a random tableau?

Creating a resource count unit test in Q#

How do I get a list of control qubits from Q# operations when tracing the simulation in C#?

cirq.Ry complains that it needs one argument

How do I do printf debugging in Q# in a convenient way?

Deriving a state vector from a stabilizer state's generators

How do I multiply an integer and a double in Q#?

Programmatic access to wavefunction in Q# for tests