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Quantum Computing

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 Popular Question
Question with 1,000 views. This badge can be awarded multiple times.
Awarded 1261 times.
Oblivious Amplitude Amplification
Awarded 15 hours ago
Can anyone provide me with an example of the for Grover's algorithm on one qubit?
Awarded 18 hours ago
Drawing the circuit in Qiskit - how to set same style as in Composer?
Awarded yesterday
How do I change the number of max_shots of Aer qasm_simulator in Qiskit running on my computer?
Awarded Sep 14 at 9:35
Clarification on state prep for quantum phase estimation
Awarded Sep 13 at 10:23
Quantum algorithm for linear systems of equations (HHL09): Step 2 - What is $|\Psi_0\rangle$?
Awarded Sep 11 at 3:57
Can Grover's algorithm be used to efficiently find elements in unsorted lists?
Awarded Sep 10 at 22:25
Simulating a quantum circuit with decoherence and noise
Awarded Sep 10 at 16:24
The relationship between max-cut and max independent set
Awarded Sep 10 at 0:02
Why are rotations represented by exponentials of Pauli matrices?
Awarded Sep 8 at 23:49
How to plot histogram using statevector simulator?
Awarded Sep 8 at 2:57
Using Qiskit's AerSimulator with an AMD GPU
Awarded Sep 7 at 18:45
How to distinguish quantum random from classical random?
Awarded Sep 4 at 17:50
What would be the meaning of an $i$ in a qubit state $i\alpha|0\rangle+\beta|1\rangle$?
Awarded Sep 3 at 23:06
No-cloning theorem and distinguishing between two non-orthogonal quantum states revisited
Awarded Sep 2 at 15:02
How do I decompose the given $4\times 4$ matrix in terms of Pauli matrices? [duplicate]
Awarded Sep 2 at 8:41
Confusion about the output distribution of Haar random quantum states
Awarded Aug 31 at 14:49
how to simulate toric and surface codes with stim + PyMatching
Awarded Aug 29 at 15:56
Are quantum states like the W, Bell, GHZ, and Dicke state actually used in quantum computing research?
Awarded Aug 29 at 14:52
Is there a simplified formula for the adjoint of the outer product of ket and bra?
Awarded Aug 29 at 7:44
How can I visualize a stim circuit?
Awarded Aug 26 at 14:54
What is the difference between quantum gates and quantum channels?
Awarded Aug 21 at 11:12
What is (formally) a transversal operator?
Awarded Aug 20 at 18:03
Scalability of ion trap quantum computers
Awarded Aug 19 at 9:47
What are the main differences between the "unitary coupled cluster" and the "hardware efficient" ansatzes in VQE?
Awarded Aug 18 at 13:12
Matplotlib graphs are being duplicated each time
Awarded Aug 18 at 9:56
How to write the covariance matrix of a quantum gaussian state as a function of photon numbers?
Awarded Aug 16 at 20:40
ModuleNotFoundError: No module named 'qiskit.extensions'
Awarded Aug 16 at 18:00
How to calculate CNOT gate for three-qubit (1-control, 2-target) states as a matrix?
Awarded Aug 12 at 15:55
Qiskit plot_histogram and count not working [closed]
Awarded Aug 11 at 13:35
Can Qiskit decompose circuits into non-IBMQ basis gate sets?
Awarded Aug 8 at 23:35
Universal Gate Set, Magic States, and costliness of the T gate
Awarded Aug 5 at 11:53
Python shorthand for tensor product (Kronecker product)
Awarded Aug 3 at 16:51
Principal square root of Pauli Y gate in Qiskit?
Awarded Aug 2 at 9:56
Can you give an intuitive idea behind how the Minimum Weight Perfect Matching (MWPM) decoder work?
Awarded Aug 2 at 7:40
Finding the maximum number of Q# simulatable qubits
Awarded Aug 1 at 20:10
How well different featuremap encode the data？
Awarded Jul 30 at 11:07
how to plot probability histogram and/or bloch sphere of single qubit in multi-qubit quantum circuit in Qiskit?
Awarded Jul 30 at 11:07
Why do we need Entanglement? [duplicate]
Awarded Jul 29 at 23:57
State of the art logical gate implementations for surface code
Awarded Jul 29 at 21:25
What is the probability of detecting Eve's tampering, in BB84?
Awarded Jul 29 at 19:23
Transpiling qiskit quantum circuits on IonQ Native Gates
Awarded Jul 24 at 11:32
Trouble importing Qiskit
Awarded Jul 24 at 6:47
Can you find how many one qubit and 2 qubit gates are in a circuit in Qiskit?
Awarded Jul 23 at 17:04
Why does Parity mapping allow 2 qubit reduction?
Awarded Jul 22 at 18:51
Is there a way to have multiple conditions in a `c_if` in Qiskit?
Awarded Jul 21 at 19:04
What does a negative ket state represent?
Awarded Jul 21 at 14:02
Is it possible to convert classical algorithms to quantum ones?
Awarded Jul 19 at 11:11
Why after transpiling a Qiskit circuit we obtain a different result?
Awarded Jul 19 at 9:50
How to measure a quantum circuit's execution time on a real IBM device?
Awarded Jul 16 at 14:12
How to implement a circuit preparing the three-qubit W state?
Awarded Jul 14 at 20:46
AerError: 'unknown instruction: c-unitary' while using control unitary operator
Awarded Jul 12 at 7:10
What is the connection between Bures metric and (finite) Bures distance?
Awarded Jul 10 at 21:31
How to actually send Qiskit code to the que to be ran on an IBM Quantum Computer?
Awarded Jul 10 at 13:20
How universal is the Toffoli gate for classical reversible computing?
Awarded Jul 10 at 12:56
Quantum Circuit not drawing?
Awarded Jul 9 at 6:04
Examples of VQE on Qiskit
Awarded Jul 8 at 2:52
What is the set of all functions from ℤ to ℤ?
Awarded Jul 8 at 1:51
Understanding (theoretical) computing power of quantum computers
Awarded Jul 7 at 13:50
Are there any algorithms that take measurements in an intermediate step?
Awarded Jul 7 at 6:04
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