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Open Quantum Systems Decoherence Quantum Simulation

Dynamics of the Density Cube

arXiv
Authors: Nabin Bhatta, Djordje Minic, Tatsu Takeuchi

Year

2026

Paper ID

67655

Status

Preprint

Abstract Read

~2 min

Abstract Words

94

Citations

0

Abstract

Density cube theory extends the canonical quantum density matrix ρij with the addition of an extra index to ρijk. The elements of the density cube with two different indices, ρiij and ρijj, correspond to the real and imaginary parts of the off-diagonal element ρij of the density matrix and describe double-path interference, while those with three different indices describe non-canonical triple-path interference. In this letter, we propose an equation of motion for the density cube, obtained from the quantization of ternary Nambu dynamics, and find that pairs of triple-path interferences oscillate into each other.

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  • This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
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  • Density cube theory extends the canonical quantum density matrix ρij with the addition of an extra index to ρijk.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2606.02421 [2] arXiv https://arxiv.org/abs/2606.02421 [3] Publisher https://arxiv.org/abs/2606.02421

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal • updated 2026-06-14 05:20:01

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