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hft's user avatar
hft's user avatar
hft
  • Member for 1 year, 4 months
  • Last seen more than a week ago
4 votes

What is the expectation value for the ground state of $ H = \sum_i Z_i Z_{i+1} + \sum_i X_i $?

4 votes

AttributeError: 'QuantumCircuit' object has no attribute 'save_statevector'

4 votes

Is the balanced superposition of all three-qubit computational basis states entangled?

4 votes
Accepted

What is $HTHTH\left| 0 \right>$?

4 votes
Accepted

Why is the conjugate being used when rewriting a qubit state in another basis?

4 votes
Accepted

How to properly understand Born's rule as written in the Feynman Lectures?

3 votes
Accepted

How to create a electron in a superpositon?

3 votes
Accepted

How to get the "number of columns" in a Qiskit quantum circuit?

3 votes

How to prove that the trace of a density matrix is $1$?

2 votes
Accepted

What is meant by the "quasi-locality" of the interactions in a quantum annealer?

2 votes

Sycamore 2 versus Osprey

2 votes
Accepted

Modular Addition general explanation

2 votes

How do you find the possible measurement values of an observable?

2 votes
Accepted

What's $(\langle 0|\otimes I)(|00\rangle + |11\rangle)$ simplified?

1 vote
Accepted

Why does a bitwise product show up in Simon’s algorithm?

1 vote

How am I suposed to do a measurement in a quantum circuit?

1 vote
Accepted

Understanding the Hadamard gate and what is meant by qubits

1 vote
Accepted

How to interpret the encoding circuit for the 5-qubit QECC

1 vote

Is my interpretation about the outer product representation correct?

1 vote
Accepted

Can qubits be entangled without being classically corelated?

1 vote

How to get $\theta$ and $\phi$ in a Bloch sphere for individual qubits in a quantum register?

1 vote

Why is a density matrix an orthogonal projector?

0 votes

Explanation of the 2.60 equation page 76 in the Nielsen and Chuang

0 votes
Accepted

Entanglement and superposition illustration

0 votes
Accepted

Compute the output of a quantum circuit with classically controlled operations

0 votes

How to deal with entanglement using quantum relativistic equations?

0 votes
Accepted

How to shift the eigenvalues of a quantum Hermitian operator G to ±r?

0 votes

Non-unitary projection on Qiskit

0 votes

Exercise 4.16 in the Nielsen & Chuang book