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Results tagged with quantum-mechanics
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user 95894
Quantum mechanics describes the microscopic properties of nature in a regime where classical mechanics no longer applies. It explains phenomena such as the wave-particle duality, quantization of energy, and the uncertainty principle and is generally used in single-body systems. Use the quantum-field-theory tag for the theory of many-body quantum-mechanical systems.
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Need help understanding delayed choice and entanglement swapping
From delayed choice experiment
The results of all four measurements are then compared. If Victor did not entangle his two photons, the photons
received by Alice and Bob are uncorrelated with ea …
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1
answer
171
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Discriminate between bell states
Is it possible to discriminate between 2 of the four Bell states (phi, psi) and does it interfere with the entanglement?
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Question about Bell state analyzers
Is there a Bell state analyzer that would take as input 2 qubits in Bell state, distinguish between psi and phi states and send psi states to output A and phi states to output B?
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Entanglement swapping and Bell state analyzer
In entanglement swapping where AB from two entangled pairs AC and BD are projected into Bell state by Bell state measurement (https://en.wikipedia.org/wiki/Bell_state#Bell_state_measurement) on A and …
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1
answer
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Correlated bell states
I have a question about terminology. What is the terminology for describing 2 correlated bell states shared by 4 qubits?
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Local operation on bipartite quantum system
It is not possible to discriminate between Bell states of an entangled system without collapsing the wave function and destroying the entanglement.
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Local operation on bipartite quantum system [closed]
Suppose we have a state:
$$
|\Psi_{1234}\rangle = \frac{1}{2}\left(|\Psi_{14}^+\rangle \otimes |\Psi_{23}^+ \rangle + |\Psi_{14}^-\rangle \otimes |\Psi_{23}^- \rangle - |\Phi_{14}^+\rangle \otimes |\ …