Quantum Computing
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Awarded 959 times.
Do there exist problems known to be computationally intractable for quantum computer, but tractable for classical computer?
Awarded Jan 5 at 22:55
How to Aggregate Multiple Gate Fidelities
Awarded Jan 4 at 23:20
How is a qubit in superposition between $|0\rangle$ and $|1\rangle$ different from a mixture of $|0\rangle$ and $|1\rangle$? [duplicate]
Awarded Jan 4 at 20:11
Weird Grover's Algorithm Behavior
Awarded Jan 3 at 16:35
Understanding transversal gates for the 7 qubit steane code
Awarded Jan 2 at 13:57
Qiskit PauliWeightedOperator in the matrix representation?
Awarded Jan 2 at 9:08
Qiskit Controlled S and Controlled T Gates
Awarded Jan 2 at 8:26
What kind of boolean functions are faster to compute on qc?
Awarded Jan 2 at 4:36
How can measuring a particle in a GHZ state leave behind a maximally entangled pair?
Awarded Jan 2 at 2:17
Why do the eigenvectors of a spin observable not align with the direction of the spin?
Awarded Dec 31 '20 at 23:28
Are there any algorithms that take measurements in an intermediate step?
Awarded Dec 31 '20 at 22:17
Design a circuit implementing the unitary matrix
Awarded Dec 30 '20 at 21:51
How to show that Bell states are orthonormal
Awarded Dec 30 '20 at 10:50
Is there a name for the 3-qubit gate that does NOT NOT NOTHING?
Awarded Dec 28 '20 at 0:32
How do Hadamard and CNOT gates work on Qiskit SDK? Why is the output reversed?
Awarded Dec 27 '20 at 1:57
How does the outcome of measurement of a qubit change when we use different basis despite the system hasn't changed? [closed]
Awarded Dec 25 '20 at 1:57
Is every computer in IBM's fleet based on superconductivity?
Awarded Dec 22 '20 at 10:57
Mistake in using dirac notation when applying $X$ gate to vector
Awarded Dec 22 '20 at 7:45
Access and set_state during quantum computation simulation in cirq
Awarded Dec 21 '20 at 21:31
How to transpile a circuit using Qiskit as done in IBMQ experience
Awarded Dec 19 '20 at 20:27
Computing the CDF with QAE in Qiskit
Awarded Dec 19 '20 at 10:27
Do we know the limits of the quantum Tsallis entropy?
Awarded Dec 16 '20 at 13:06
Positive semidefinite relationship after partial trace
Awarded Dec 16 '20 at 12:11
How to interpret complex probability of superposition state?
Awarded Dec 16 '20 at 8:42
Role of convexity in proof of Monogamy of Bell correlations
Awarded Dec 15 '20 at 15:56
Decomposition of 2-qubit Hamiltonian into standard gate set for QAOA
Awarded Dec 14 '20 at 11:56
Have you ever seen the preparation of the state $a^{*}|0\rangle+b^*|1\rangle$ and $a|0\rangle+b|1\rangle$ from one initial state?
Awarded Dec 12 '20 at 9:02
Does Cirq support GPU acceleration?
Awarded Dec 12 '20 at 0:27
Measuring in the computational basis in the single qubit gate QFT implementation
Awarded Dec 11 '20 at 16:47
How to effectively compute eigenvalue rotation in HHL
Awarded Dec 11 '20 at 14:27
How to build a Hilbert space when do we already have concrete quantum logic gates available?
Awarded Dec 11 '20 at 12:45
How does a generic controlled-U operation work?
Awarded Dec 11 '20 at 10:26
Trying to understand this measurement of a simple quantum circuit
Awarded Dec 10 '20 at 18:56
Decomposing gates resembling exponentiated members of desired gateset
Awarded Dec 9 '20 at 23:25
What precisely is quantum annealing?
Awarded Dec 9 '20 at 11:04
Does this point-projection of a mixed state onto a pure state appear in the quantum information theory literature?
Awarded Dec 8 '20 at 17:34
Conjugate transpose of a U-gate
Awarded Dec 8 '20 at 11:16
qiskit: How to get an operator acting on a certain qubit?
Awarded Dec 8 '20 at 8:25
How do get from $|0\rangle=\alpha|a\rangle+\beta|b\rangle$, $|1\rangle=\gamma|a\rangle+\delta|b\rangle$ to an expression for $|01\rangle-|10\rangle$?
Awarded Dec 8 '20 at 7:42
What does $|j\rangle$ mean, when $j > 1$?
Awarded Dec 7 '20 at 16:15
Existence of unitary matrix that produces quantum coin with given frequencies via iteration
Awarded Dec 7 '20 at 11:00
Does TensorFlow Quantum tfq.convert_to_tensor work on custom gates?
Awarded Dec 7 '20 at 6:27
How to get subspace of quantum circuit?
Awarded Dec 6 '20 at 23:40
Using Qiskit VQE for solving an eigenvalue problem
Awarded Dec 5 '20 at 21:18
Shor's algorithm: what to do after reading the QFT's result twice?
Awarded Dec 5 '20 at 20:28
How to run a OpenQASM 3.0 file?
Awarded Dec 5 '20 at 7:05
Coping values based on indicator qubit in Qiskit
Awarded Dec 5 '20 at 1:05
How to measure expectation values of $Z$ and $X$ on the given states? [closed]
Awarded Dec 4 '20 at 5:42
A CNOT between two Hadamard gates: why does the CNOT changed the output of the second Hadamard gate?
Awarded Dec 1 '20 at 21:56
Does 1 qubit correspond to 2 bits?
Awarded Nov 30 '20 at 20:19
Question about a circuit from “Quantum Computing for Computer Scientists”
Awarded Nov 30 '20 at 14:16
How to generate all stabilizer states numerically?
Awarded Nov 30 '20 at 12:48
Can I teleport a string of 0s and 1s?
Awarded Nov 30 '20 at 4:12
Inequality in overlap of quantum states
Awarded Nov 29 '20 at 21:22
Discrepancy in inner product between tensor products
Awarded Nov 29 '20 at 11:09
Does it make sense to sum two Choi operators?
Awarded Nov 28 '20 at 20:34
Pauli Matrix tolerant and encoding
Awarded Nov 26 '20 at 9:18
Is the trace distance between multipartite states invariant under permutations?
Awarded Nov 26 '20 at 8:51
What is $\sum_{i}\langle i \vert U \vert j\rangle$ for unitary $U$?
Awarded Nov 25 '20 at 11:58
How does feedback work in simple Grovers algorithm where $n=4$?
Awarded Nov 23 '20 at 16:27
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