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Questions tagged [ghz-state]

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3 votes
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What is the general form for GHZ and W class states?

I am reading the following paper on mixed three-qubit states. It states that any three–qubit pure state can be written as (equation 1 of the paper) $|\psi_{GHZ}\rangle=\lambda_0 |000\rangle+\lambda_1 ...
Anindita Sarkar's user avatar
2 votes
3 answers
143 views

Are GHZ states absolutely maximally entangled?

The definition of an absolutely maximally entangled state is as follows: "A multipartite state $|\psi\rangle$ of a system S is called absolutely maximally entangled if for any bipartition A|B of ...
reza's user avatar
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How can I find the probabilities corresponding to measurement results of an observable of the GHZ states?

I'm working on a problem involving the calculation of probabilities for outcomes of a measurement on a quantum state perturbed by an error. The state in question is a GHZ state $|\text{GHZ}\rangle = \...
Alex1111's user avatar
0 votes
1 answer
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Why does measuring a GHZ state in the computational basis destroy the entanglement?

Measuring in a basis other than the computational (Z) basis will generally destroy any entanglement present in the GHZ state, as the entanglement is defined with respect to specific basis states. Why? ...
Rayhan Kabir's user avatar
3 votes
1 answer
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Output of my quantum circuit to create 3-qubit GHZ-like state does not make sense mathematically

I want to create the GHZ-like state, $|\Psi\rangle = \frac{1}{\sqrt{2}} \left(|011\rangle - |100 \rangle \right)$. I build my circuit in the following way. apply the x gate to the first and third ...
molan li's user avatar
5 votes
0 answers
287 views

Difference between a star graph state and GHZ graph state

I saw in a class that star state and GHZ state are local-Clifford equivalent (Hadamard on n-1 qubits for a n star state). But then, when I wanted to draw a GHZ state and check on the litterature ...
MohamedSU's user avatar
3 votes
1 answer
530 views

Cirq: n-qubit GHZ state

I am trying to write $n$ party GHZ state but at the end of the day, it seems like bi partite state. I am missing a detail. Here is my code ...
quest's user avatar
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1 vote
1 answer
263 views

Producing $|ghz\rangle\langle ghz|$ State in Cirq

I could manage to produce 3 qubit ghz state in Cirq. But I don't know how I can produce $|GHZ\rangle\langle GHZ|$ in Cirq Here is my code for 3 qubit ghz state Can you help me please for improving my ...
quest's user avatar
  • 626
2 votes
1 answer
340 views

Transferring GHZ state onto some qubits

This question is just my effort that I made by understanding the previous answers to my questions . I have a GHZ state $|000\rangle+|111\rangle$ (please ignore the normalizing constant). For ...
Upstart's user avatar
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