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Extracting past-future vacuum correlations using circuit QED

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arxiv 1202.1230 v2 pith:665K3LIA submitted 2012-02-06 quant-ph cond-mat.mes-hallgr-qc

Carlos Sabin , Borja Peropadre , Marco del Rey , Eduardo Martin-Martinez This is my paper · ORCID
classification quant-phcond-mat.mes-hallgr-qc
keywords past-futurequantumqubitscircuitcorrelationsexperimentqubittime
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We propose a realistic circuit QED experiment to test the extraction of past-future vacuum entanglement to a pair of superconducting qubits. The qubit P interacts with the quantum field along an open transmission line for an interval T_on and then, after a time-lapse T_off, the qubit F starts interacting for a time T_on in a symmetric fashion. After that, past-future quantum correlations will have transferred to the qubits, even if the qubits do not coexist at the same time. We show that this experiment can be realized with current technology and discuss its utility as a possible implementation of a quantum memory.

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    math.DS 2025-08 unverdicted novelty 5.0 of 10

    Claims a delay-independent global exponential stability criterion for a broad class of nonlinear nonautonomous delay differential equations using isospectral reduction of an associated sequence of matrices.

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