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Quantum Computing

Enlightened

 Enlightened
First to answer and accepted with score of 10 or more. This badge can be awarded multiple times.
Awarded 245 times.
Why is the angle of $R_z(\frac\pi4) R_x(\frac\pi4)$ an irrational multiple of $\pi$
Awarded Oct 21 at 13:01
Universal Gate Set, Magic States, and costliness of the T gate
Awarded Oct 10 at 14:34
What's hook error in surface code?
Awarded Aug 13 at 10:12
Do quantum loops exist?
Awarded Aug 1 at 10:22
Simple example for the sub-optimality of MWPM vs Maximum likelihood decoder
Awarded Jul 21 at 3:01
If T gates are now as expensive as CNOTs, what should be optimized?
Awarded Jul 19 at 14:41
Prove that adding any non Clifford gate to the Clifford group yields a universal gate set
Awarded Jul 16 at 3:43
Magic State Distillation Understanding Check
Awarded Jul 10 at 4:07
How does one modify the surface code cycle time in the code for "How to factor 2048 bit RSA integers with less than a million noisy qubits"?
Awarded Jul 9 at 9:07
Why does QAOA achieve quantum supremacy in an algorithmic sense?
Awarded Jul 8 at 11:17
Are three POVM measurements on a single qubit physically realizable?
Awarded Jul 8 at 3:50
Why do we care about the number of $T$ gates in a quantum circuit?
Awarded Jun 30 at 16:34
What are reviews on the search for good quantum LDPC codes?
Awarded May 5 at 16:21
What is the matrix for a SWAP operation on two qubits?
Awarded Apr 23 at 10:46
How many logical qubits are needed for RSA breaking?
Awarded Apr 10 at 3:35
Is it possible to make a Toffoli gate using only CNOTS and ancillas?
Awarded Mar 29 at 10:54
How to interpret a 4 qubit quantum circuit as a matrix?
Awarded Mar 4 at 19:30
Why does representation theory often arise in the context of quantum algorithms for the hidden subgroup problem?
Awarded Jan 26 at 15:51
Clarification on state prep for quantum phase estimation
Awarded Jan 20 at 15:26
Non-unitary matrix decomposition as a sum of unitary matrices
Awarded Jan 20 at 8:32
What is a POVM?
Awarded Jan 17 at 19:38
What does it mean to take the Choi-Jamiolkowski of a quantum channel?
Awarded Jan 10 at 17:06
Correct formulation of Exercise 4.11 in Nielsen and Chuang
Awarded Dec 29, 2024 at 15:06
What good references would you recommend to understand the (continuous-variable) CV model of computation?
Awarded Dec 19, 2024 at 14:00
Is SO(2) with any entangling gate universal?
Awarded Dec 13, 2024 at 19:51
Are entangled and Bell states the same thing?
Awarded Dec 11, 2024 at 6:18
What is the difference between "Shot-Noise-Limit" and "Standard Quantum Limit"?
Awarded Nov 28, 2024 at 15:33
Quantum error correction references
Awarded Nov 1, 2024 at 8:48
What are "completely positive" and "CPTP" quantum maps?
Awarded Oct 6, 2024 at 15:10
Are there any algorithms that take measurements in an intermediate step?
Awarded Sep 27, 2024 at 15:32
How to find the operator sum representation of the depolarizing channel?
Awarded Sep 25, 2024 at 3:26
What is the complexity of hidden subgroup problems?
Awarded Aug 28, 2024 at 17:33
Is there a general method of expressing optimization problem as a Hamiltonian?
Awarded Aug 19, 2024 at 9:05
Worst Bell inequality violation with non-maximally entangled state?
Awarded Aug 6, 2024 at 12:52
Implementation of inverse QFT?
Awarded Aug 6, 2024 at 5:40
How to check if a $n$-qubit unitary is the tensor product of single-qubit unitaries
Awarded Jul 24, 2024 at 13:41
What exactly is a subsystem code?
Awarded Jul 23, 2024 at 20:16
Can we avoid repetition in Shor's algorithm by using the quadratic formula?
Awarded Jul 19, 2024 at 15:55
What does "lift" mean in the Lifted Product (LP) Code?
Awarded Jul 5, 2024 at 14:38
Doing non-unitary operations on quantum computer
Awarded Jun 20, 2024 at 10:30
Is the Clifford group a semidirect product?
Awarded Jun 11, 2024 at 16:15
Definition of magic $T$ and $H$ states: are there different definitions for them?
Awarded Jun 8, 2024 at 3:27
What kinds of objects are Liouvillian, Lindbladian, and Davies generator?
Awarded May 14, 2024 at 7:07
What is the difference between relaxation, dephasing, and decoherence?
Awarded May 11, 2024 at 16:26
Intuition behind the construction of an ansatz circuit
Awarded May 2, 2024 at 12:35
Positive semidefinite relationship after partial trace
Awarded Apr 30, 2024 at 11:37
What are examples of the correspondence between channels and their Stinespring dilations?
Awarded Apr 29, 2024 at 0:40
Advantage of simulating sparse Hamiltonians
Awarded Apr 28, 2024 at 1:55
What is the probability of finding the second qubit as $0$ in the state $|\psi\rangle=\frac1{\sqrt2}|00\rangle+\frac12|10\rangle-\frac12|11\rangle $?
Awarded Apr 22, 2024 at 22:27
Quantum phase estimation and HHL algorithm - knowledge of eigenvalues required?
Awarded Apr 21, 2024 at 17:26
Does the Quantum Fourier Transform require universality?
Awarded Apr 16, 2024 at 15:42
How does magic state distillation overhead scale compare to quantum advantages?
Awarded Apr 12, 2024 at 8:35
Why is it not a good idea to run Shor's algorithm on a big noisy quantum computer?
Awarded Apr 4, 2024 at 19:50
How to selectively apply noise in Qiskit simulations?
Awarded Apr 2, 2024 at 16:26
How does the number of copies affect the diamond distance?
Awarded Mar 25, 2024 at 10:20
What is the intuition behind quantum t-designs?
Awarded Mar 3, 2024 at 16:30
How to calculate an Expected Value of some operator acting on qubits?
Awarded Feb 25, 2024 at 8:07
Quantum Circuit To Compute Any Inner Product
Awarded Jan 17, 2024 at 5:52
What's an use case of the inner product between two qubits in a quantum algorithm?
Awarded Jan 17, 2024 at 5:52
If a quantum error correcting code can correct every single-qubit $X$ and $Z$ error, can it also correct every single-qubit $Y$ error?
Awarded Dec 16, 2023 at 11:48
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