A PPT witness criterion is proposed to detect graviton-mediated entanglement between photons and matter qubits, attaining a maximal negativity of -0.052 for non-maximally entangled states when the photon coherent-state overlap satisfies 0.71 ≤ |γ| < 1.
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Virtual graviton exchange between a photon and a high-spinning quantum rotor generates entanglement between photon degrees of freedom and rotor position, with prograde-retrograde motion yielding observable differences in linear entanglement entropy.
The paper organizes important open questions in quantum gravity and quantum information into four themes without presenting new results or derivations.
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Witnessing entanglement between photon and matter due to graviton exchange
A PPT witness criterion is proposed to detect graviton-mediated entanglement between photons and matter qubits, attaining a maximal negativity of -0.052 for non-maximally entangled states when the photon coherent-state overlap satisfies 0.71 ≤ |γ| < 1.
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Graviton-mediated entanglement due to light bending from a quantum rotor
Virtual graviton exchange between a photon and a high-spinning quantum rotor generates entanglement between photon degrees of freedom and rotor position, with prograde-retrograde motion yielding observable differences in linear entanglement entropy.
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Rethinking quantum information in gravity and fields
The paper organizes important open questions in quantum gravity and quantum information into four themes without presenting new results or derivations.