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meelszz
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5 votes
2 answers
880 views

How to find the reduced density matrix of a four-qubit system?

4 votes
1 answer
515 views

How to find a common eigenstate of commuting operators?

3 votes
1 answer
120 views

Find the local unitary that takes the bell state to a state phi that has an extractable bell state

3 votes
1 answer
52 views

Is it possible to have entanglement with different sized parties or with more than 2 parties?

2 votes
3 answers
623 views

Find probability of a single qubit's measurement results from a 5 qubit state

2 votes
2 answers
256 views

How do I write a tensor product of conditional gates in matrix form?

2 votes
1 answer
81 views

Perform quantum gate operations using state vectors and matrices

2 votes
3 answers
936 views

Controlled Z gate acting on 3 qubits in matrix form

1 vote
2 answers
110 views

How to represent $|+\rangle$ in Python?

1 vote
1 answer
721 views

Taking the two qubit reduced density matrix on a 5 qubit system

1 vote
1 answer
545 views

Intuitive meaning of the eigenvalues and eigenvectors of a reduced density matrix