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Share Your Experience: Take the 2024 Developer Survey
R.W's user avatar
R.W's user avatar
R.W's user avatar
R.W
  • Member for 4 years, 7 months
  • Last seen more than a month ago
7 votes

Will quantum computers of the future be operational under room temperatures (above 0 Celsius)?

7 votes
Accepted

Do the linear operators $M\otimes I$ and $I\otimes N$ commute?

6 votes
Accepted

What really is Quantum Entanglement and what are its benefits?

5 votes

How can I show that $\mathsf{QMA}\subseteq \mathsf{PSPACE}$

5 votes
Accepted

Meaning of the notation $[d]$ in scientific paper

5 votes

Can I learn quantum computing without math?

4 votes
Accepted

What is the actual Hilbert space of a $N$-qubit system?

4 votes
Accepted

How can orthonormal vectors satisfy $\langle i|j\rangle=\delta_{ij}$?

4 votes
Accepted

Is there a non one-way quantum computer?

3 votes

Is the SWAP gate a Clifford Gate? How would I express it using the Clifford Gate generators?

3 votes
Accepted

Does the CX gate always leave the first qubit unchanged and swap the amplitudes of the second one?

3 votes
Accepted

What type of "local hidden variable" is ruled out when discussing (non)contextuality?

3 votes
Accepted

Are there any experimental groups currently measuring quantum contextuality?

3 votes
Accepted

What is the difference between "permutationally invariant" and "symmetric" states?

3 votes

What is the difference between Error Mitigation (EM) and Quantum Error Correction (QEC)?

3 votes
Accepted

Prove the triangle inequality for the trace norm: $\|M+N\|_1\le \|M\|_1+\|N\|_1$

3 votes
Accepted

Matrix representation of SWAP on two qubit registers?

3 votes
Accepted

State tomography with Pauli basis measurements for a high number of qubits

3 votes
Accepted

What does the notation $\sum_\lambda \lambda \left | \lambda \right > \left < \lambda \right |$ mean?

2 votes
Accepted

What Alice and Bob receive after entangled pair of qubits (generated by any source)?

2 votes
Accepted

About swap gate

2 votes

Does the ZX calculus allow for Y-axis rotations?

2 votes

A doubt regarding Mach-Zehnder Interferometer functioning

2 votes

Can a unitary with size not a power of 2 be used for Quantum Phase Estimation?

2 votes

CNOT entangling a third qubit and how measurement impacts entanglement

2 votes

What are quantum computers actually doing today?

2 votes
Accepted

Why should we purify a mixed state?

2 votes

Can the Peres-Mermin square be reframed as a statement on the associated conditional outcome probabilities?

2 votes
Accepted

Is the boundary of the set of quantum behaviours a polytope?

2 votes
Accepted

Verify that $\langle \sigma^x\rangle^2+\langle\sigma^y\rangle^2+\langle\sigma^z\rangle^2=1$ for $|\psi\rangle=\cos\theta|0\rangle+\sin\theta|1\rangle$