20 Can the Bloch sphere be generalized to two qubits? 2018-11-13T10:05:23.127

13 Why are half angles used in the Bloch sphere representation of qubits? 2018-08-30T16:44:48.667

12 How to think about the Z gate in a Bloch sphere? 2018-06-01T20:54:15.730

11 Rotating about the y- or z-axis of the Bloch sphere 2018-06-04T09:13:08.030

10 Why is an entangled qubit shown at the origin of a Bloch sphere? 2019-01-08T22:30:58.257

9 How many classical bits are needed to represent a qubit? 2020-03-13T14:45:02.853

8 Is there any online Bloch sphere simulator? 2019-05-20T13:21:45.093

8 Do pure qudit states lie on a hypersphere in the Bloch representation? 2019-10-05T10:09:31.763

7 From Q# measurements to Bloch sphere 2018-06-28T09:08:57.430

7 The general form of unitary operations on a single qubit 2018-06-29T00:37:30.167

7 How to obtain Y rotation with only X and Z rotations gates? 2018-11-20T11:15:49.627

7 Does the trace distance have a geometrical interpretation? 2019-11-07T13:02:55.623

7 What makes representing qubits in a 3D real vector space possible? 2020-12-29T19:14:56.900

6 How to prove that Z operator rotates points on Bloch sphere about Z axis through 180°? 2018-06-09T13:27:41.053

5 Flying qubits compared with stationary qubits 2018-09-27T08:13:30.127

5 Drawing tangent vectors to the Bloch sphere with qutip 2019-04-23T14:46:54.680

5 Represent a pure state in terms of 2 antipodal points on the Bloch sphere 2020-04-06T19:10:06.370

4 Computing Majorana "Stars" 2018-07-08T06:08:14.047

4 Homeomorphism or stereographic projection corresponding to the set of mixed states within the Bloch sphere 2019-03-02T23:39:45.080

4 Plotting Bloch sphere in QuTiP 2019-06-12T05:19:47.073

4 Maximum number of "almost orthogonal" vectors one can embed in Hilbert space 2019-07-18T06:38:31.243

4 How are measurements on $Z$ and $X$ axes interpreted in the Bloch sphere? 2019-09-02T15:04:40.220

4 What is the corresponding code for finding the state of a qubit on the Bloch sphere? 2019-12-21T20:09:10.090

4 How should I understand the change of qubit's basis as a rotation? 2020-03-14T12:06:08.600

4 How to sample from the uniform distribution over the tensor product of two Bloch spheres? 2020-10-27T10:26:52.160

4 Show that the Hadamard gate is equivalent to a 180 degree rotation of a certain axis 2020-12-29T06:25:48.407

3 Spin precession using a laser 2019-02-03T18:37:40.787

3 What's a vector in the Bloch sphere representation? 2019-02-28T03:34:16.083

3 What utility is provided by the Bloch sphere visualization? 2019-02-28T07:25:33.967

3 How are orthogonal sets of pure states arranged in state space? 2019-06-04T22:38:47.370

3 How to add states on the Bloch sphere from a master equation? 2019-06-19T06:30:41.697

3 Probability of equal outcomes measuring a Bell state in the directions $\vec{n}_1,\vec{n}_2$ 2019-10-13T16:51:03.880

3 Deriving Bloch vector $dr$ from master equation 2020-03-17T05:14:13.897

3 Reduced Density Matrix Equation of Motion to describe an Ellipse 2020-08-06T15:10:48.443

3 Benefit of phase shift in quantum computing 2020-10-07T17:58:57.197

3 Why the 3rd dimension of Bloch sphere? 2020-10-14T16:50:42.073

3 How does adding an identity to an Hamiltonian affect the corresponding time-evolution in the Bloch sphere? 2020-11-03T05:56:48.520

3 Does this point-projection of a mixed state onto a pure state appear in the quantum information theory literature? 2020-12-07T17:52:26.813

3 How is a two qubit mixed state represented in the form of Bloch vector? 2021-01-27T14:46:14.113

2 Purity of mixed states as a function of radial distance from origin of Bloch ball 2019-03-03T00:43:44.470

2 What is the meaning of writing a state in its Bloch representation? 2019-04-27T20:24:40.693

2 Why is the boundary of the set of states in the generalised Bloch representation comprised of singular matrices? 2019-04-29T14:37:59.510

2 Bloch Sphere - Rotation Matrix 2019-08-13T19:19:20.463

2 How to prove that antipodal points on the Bloch sphere are orthogonal? 2019-09-13T03:06:13.540

2 Can you use Rz to flip from $|+\rangle$ to $|-\rangle$? 2019-12-22T01:14:50.723

2 What is the probability of a single qubit state lying over the surface of Bloch sphere? 2020-01-05T15:15:19.530

2 How to get Bloch sphere angles given arbitrary qbit as linear combination of basis vectors? 2020-03-07T19:53:54.167

2 How is a qubit represented on a bloch sphere? 2020-03-27T04:52:02.750

2 Does normalizing a mixed state give a pure state? 2020-05-23T20:11:28.723

2 Is $e^{i\beta} R_Z(-2\beta)$ equivalent to $U_1(2\beta)$? 2020-06-10T12:39:01.233

2 Why an element of SU(2) acts as a rotation for Majorana representation of states? 2020-08-04T12:58:41.167

2 $N(\frac{1}{2},2)=3$ for vectors in a Hilbert Space 2020-08-18T15:03:43.710

2 when we specify quantum states in $\mathbb C^2$, why do we only have $2$ basis states? 2020-09-04T18:01:09.667

2 Does composition of two single qubit rotations yield a single rotation around a unit vector? 2020-10-04T20:45:09.713

2 $3 \rightarrow 1$ QRAC encoding for XOR functions 2020-11-21T12:12:44.990

2 Numerical optimization of QRAC 2020-12-02T07:54:44.860

2 Vector from SU(2) to SO(3)? 2021-01-10T05:02:26.360

1 Bloch sphere and quantum operations 2019-12-03T13:16:21.960

1 How can I find the $\theta$ and $\phi$ values of a qubit on the Bloch sphere? 2020-01-03T18:21:53.813

1 Simplify the system to find the $\theta$, $\phi$ on bloch sphere 2020-01-08T16:54:47.107

1 Can a qubit be in the inside of the Bloch Sphere? 2020-01-15T04:09:59.413

1 Affine Map of the Bloch sphere 2020-02-09T15:31:32.850

1 Bloch sphere, where are magnitude and phase of a qbit? 2020-03-29T02:27:26.777

1 $\lambda$ parameter for U3 gate in qiskit Bloch sphere visualisation 2020-04-05T00:45:02.263

1 Effect of Pauli X gate on minus state using bloch sphere 2020-05-09T14:49:48.507

1 What kind of transformation does the Y-gate do on the bloch sphere? 2020-05-10T17:50:26.643

1 Where is $i|0\rangle$ located on the bloch sphere? 2020-05-11T18:53:04.430

1 What is the intuition of the outer product of two states? 2020-05-12T13:47:50.477

1 How are eigenvectors and eigenvalues expressed in the Bloch sphere? 2020-08-12T13:30:18.223

1 Deformation of the Bloch sphere and contraction of its planes under the action of channels 2020-09-14T14:46:39.193

1 What is the difference between the states $i|1\rangle$ and $|+i\rangle$? 2020-10-31T19:40:08.787

1 How does the CPTP constraint reflect on the matrix representation of a qubit channel in the Pauli basis? 2020-11-24T19:07:45.343

0 Can a mixed state be represented on a Bloch sphere? 2019-09-16T12:31:55.010

0 Which angle is estimated by the phase estimation algorithm? 2019-11-17T16:25:26.883

0 Find coordinates $\theta$ and $\phi$ on the Bloch sphere of a given qubit state 2020-01-08T20:09:56.317

0 Find local state and compute Bloch coordinates, like Quirk 2020-04-05T23:16:17.840

0 Cannot interpret transformations on the bloch sphere as matrix multiplications 2020-05-11T17:18:15.920

0 What is the phase of state? 2020-09-11T04:00:23.907

0 how to plot probability histogram and/or bloch sphere of single qubit in multi-qubit quantum circuit in Qiskit? 2021-01-13T10:46:37.293

-3 what are the angles , and ϕ values of the following quantum state? 2020-01-04T10:26:10.727