Maximally Sliced States as a Framework for Quantum Coherence, Entanglement, and Teleportation under Decoherence
Abstract
Quantum resources such as coherence and entanglement need not exhibit the same dependence on the parameters of a quantum state, and their responses to decoherence can differ qualitatively. We investigate these relationships using the three-qubit maximally sliced (MS) state, whose continuous parameter provides a tunable framework for redistributing quantum correlations. We analyze the relative entropy of coherence, (l_1)-norm coherence, and basis-independent coherence of the tripartite MS state and compare their behavior with the three-tangle. We then trace out one qubit and study the coherence, concurrence, and optimal teleportation fidelity of the resulting bipartite state. For this reduced state, the concurrence coincides with the (l_1)-norm coherence because both are determined by the same off-diagonal matrix element. We further examine the effects of amplitude damping and dephasing. Amplitude damping changes both populations and coherence, whereas dephasing preserves populations while suppressing phase coherence. The three coherence measures respond differently to these channels, showing that no single coherence measure fully characterizes decoherence. Under dephasing, the concurrence remains directly related to the (l_1)-norm coherence, yielding the teleportation-fidelity relation (f^T=(2+C)/3). Our results demonstrate that the MS family provides a useful tunable setting for distinguishing basis-dependent and basis-independent coherence and for studying the different responses of entanglement and teleportation resources to dissipative and phase-decoherence processes.
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BibTeX
@misc{pandey2026maximally,
title = {{Maximally Sliced States as a Framework for Quantum Coherence, Entanglement, and Teleportation under Decoherence}},
author = {Anushree Pandey and Sovik Roy},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2608.03865},
eprint = {2608.03865},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.03865},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Maximally Sliced States as a Framework for Quantum Coherence, Entanglement, and Teleportation under Decoherence
AU - Anushree Pandey
AU - Sovik Roy
PY - 2026
DA - 2026/10/27
PB - arXiv
DO - 10.48550/arxiv.2608.03865
UR - https://arxiv.org/abs/2608.03865
AB - Quantum resources such as coherence and entanglement need not exhibit the same dependence on the parameters of a quantum state, and their responses to decoherence can differ qualitatively. We investigate these relationships using the three-qubit maximally sliced (MS) state, whose continuous parameter provides a tunable framework for redistributing quantum correlations. We analyze the relative entropy of coherence, (l_1)-norm coherence, and basis-independent coherence of the tripartite MS state and compare their behavior with the three-tangle. We then trace out one qubit and study the coherence, concurrence, and optimal teleportation fidelity of the resulting bipartite state. For this reduced state, the concurrence coincides with the (l_1)-norm coherence because both are determined by the same off-diagonal matrix element. We further examine the effects of amplitude damping and dephasing. Amplitude damping changes both populations and coherence, whereas dephasing preserves populations while suppressing phase coherence. The three coherence measures respond differently to these channels, showing that no single coherence measure fully characterizes decoherence. Under dephasing, the concurrence remains directly related to the (l_1)-norm coherence, yielding the teleportation-fidelity relation (f^T=(2+C)/3). Our results demonstrate that the MS family provides a useful tunable setting for distinguishing basis-dependent and basis-independent coherence and for studying the different responses of entanglement and teleportation resources to dissipative and phase-decoherence processes.
ER -