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Qubit Entanglement Driven by Remote Optical Fields
Muhammed Yonac, Joseph H. Eberly
We examine the entanglement between two qubits, supposed to be remotely located and driven by independent quantized optical fields. No interaction is allowed between the qubits, bu…
Many-Body Separability of Warm Qubits
Ting Yu, J. H. Eberly
We analyze the separability of the joint state of a collection of two-level systems at finite temperature T. The fact that only separable states are found in the neighborhood of th…
Two-Pulse Propagation in Media with Quantum-Mixed Ground States
B. D. Clader, J. H. Eberly
We examine fully coherent two-pulse propagation in a lambda-type medium, under two-photon resonance conditions and including inhomogeneous broadening. We examine both the effects o…
Negative Entanglement Measure, and What It Implies
Ting Yu, J. H. Eberly
In this paper, we extract from concurrence its variable part, denoted , and use as a time-dependent measure of "distance", either postive or negative, from the separability…
Pairwise Concurrence Dynamics: A Four-Qubit Model
M. Yonac, Ting Yu, J. H. Eberly
We examine entanglement dynamics via concurrence among four two-state systems labeled . The four systems are arranged on an addressable "lattice" in such a way that…