All Questions
7
questions
-2
votes
1
answer
144
views
What is meant by " a basis is diagonal"?
I am trying to understand Schmidt decomposition. I am stuck in one sentence here. See the example picture.
Here, I can understand everything except the line "For both
HA and HB the Schmidt basis ...
1
vote
5
answers
1k
views
Mathematical explanation of bra-ket notation in quantum mechanics
$\newcommand{\hp}[1]{\hphantom{#1}}$
We have the entangled state of two pairs of qubits:
$$
|\psi \rangle =\frac{1}{2}|0011\rangle-\frac{1}{2}|0110\rangle-\frac{1}{2}|1001\rangle+\frac{1}{2}|1100\...
- 253
1
vote
1
answer
70
views
Is a qutrit an example of tripartite entanglement? [closed]
Is a qutrit considered to be in a state of tripartite entanglement?
- 4,509
3
votes
1
answer
101
views
Say you run qubit $A = (|0⟩ + |1⟩) / √2$ and qubit $B = |0⟩$ through a CNOT gate. What is the state of qubit $B$ afterwards?
I am new to the weeds of quantum computing and this question is probably pretty elementary.
Say you run qubit A = (|0⟩ + |1⟩) / √2 and qubit B = |0⟩ through a CNOT gate. What is the state of qubit B ...
- 133
-3
votes
2
answers
194
views
Do qubits need to be in superposition to be entangled? [closed]
Do qubits need to be in superposition to be entangled?
Put another way, can qubits be entangled but not in superposition?
-2
votes
2
answers
116
views
Efficient quantum circuit to prepare a set off entangled state
If I try to prepare an entangled state on $N$ pairs of qubits ($2N$ qubits) as $$|\psi\rangle=\sum_{i=1}^{2^N}w_i|ii\rangle , $$
with $w_i$ real factors, is there an efficient quantum circuit to ...
- 1,548
8
votes
1
answer
3k
views
Quantum circuit for a $3$-qubit $|W \rangle$ state [closed]
Can someone specify a quantum circuit that will deterministically output the $3$-qubit $|W \rangle$ state, if the input to the circuit is $|0,0,0 \rangle$? Or, is there a quantum circuit with a ...
- 722