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Journal of Tecnologia Quantica
Published by Yayasan Adra Karima Hubbi
ISSN : 30626757     EISSN : 30481740     DOI : 10.70177/quantica
Core Subject : Science,
Physics
Journal of Tecnologia Quantica is dedicated to bringing together the latest and most important results and perspectives from across the emerging field of quantum science and technology. Journal of Tecnologia Quantica is a highly selective journal; submissions must be both essential reading for a particular sub-field and of interest to the broader quantum science and technology community with the expectation for lasting scientific and technological impact. We therefore anticipate that only a small proportion of submissions to Journal of Tecnologia Quantica will be selected for publication. We feel that the rapidly growing QST community is looking for a journal with this profile, and one that together we can achieve. Submitted papers must be written in English for initial review stage by editors and further review process by minimum two international reviewers.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 2 Documents
 1 
Search results for , issue "vol. 3 no. 3 (2026)" : 2 Documents clear
Casimir Force Fluctuation and Torque Tuning in Topological Insulator-Based Micro-Electromechanical Systems Murtadha Ibrahim; Samira Al-Khalil; Khalid Al-Shaibani
Journal of Tecnologia Quantica Vol. 3 No. 3 (2026)
Publisher : Yayasan Adra Karima Hubbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70177/quantica.v3i3.4314

Abstract

Casimir interactions increasingly influence the stability of micro-electromechanical systems as device separations approach the nanoscale, yet their force fluctuations and rotational effects remain insufficiently integrated into topological-insulator device design. This study aimed to quantify Casimir force fluctuations, evaluate tunable Casimir torque, and identify mechanically stable operating regimes for topological-insulator-based micro-electromechanical systems. A theoretical-computational framework combined finite-temperature Lifshitz theory, scattering-matrix calculations, fluctuation–dissipation analysis, coupled translational–torsional mechanics, and Monte Carlo uncertainty propagation across 10,000 parameter configurations. Results showed that accepted topological-insulator configurations generated a median torque of 3.84 pN·µm and median torque modulation of 36.8%, while maintaining a lower median normal force than gold-coated references. Stable equilibria occurred in 84.8% of configurations. Separations of 100–250 nm and film thicknesses of 20–60 nm provided the most favorable compromise between torque enhancement and pull-in resistance. Magnetic surface gap and anisotropy increased torque tunability, whereas narrow gaps and elevated temperatures amplified force fluctuations and instability risk. The findings demonstrate that topological surface responses can support controllable, contactless rotational behavior when electromagnetic tunability is evaluated alongside mechanical stability. Stable fluctuation-adjusted torque, rather than maximum nominal torque, should guide the design of future quantum-enabled micro-electromechanical resonators, angular sensors, and low-power actuators under realistic material and geometric uncertainties.
Coherent Phonon-Photon Coupling in Hybrid Superconducting-Optomechanical Networks for Long-Lived Quantum Memories Gulnaz Kudaibergenova; Ilyas Nurmakhanov; Zhanar Tuleshova
Journal of Tecnologia Quantica Vol. 3 No. 3 (2026)
Publisher : Yayasan Adra Karima Hubbi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70177/quantica.v3i3.4315

Abstract

Hybrid quantum architectures require memories that unite rapid superconducting processing, durable mechanical storage, and low-loss optical communication, yet interfacial dissipation and thermal noise continue to constrain coherent state preservation. This study aimed to determine whether coherent phonon–photon coupling in superconducting–optomechanical networks could support long-lived quantum memories and to identify the physical conditions governing reliable operation. A theoretical-computational design combined an effective three-mode Hamiltonian with Lindblad master equations, quantum Langevin analysis, covariance-matrix simulations, and parameter sweeps across 12,000 stable configurations. Memory performance was assessed through efficiency, process fidelity, added noise, coherence lifetime, detuning tolerance, and coupling asymmetry. The simulations yielded mean efficiency of 78.24%, mean process fidelity of 0.86, and mean coherence lifetime of 8.63 ms. Adiabatic dark-mode transfer achieved higher median fidelity than resonant swapping (0.91 versus 0.83) and remained more resistant to thermal loading and frequency mismatch. An optimized configuration preserved 0.93 fidelity after 10 ms and attained 92.4% optical retrieval efficiency with 0.06 added-noise quanta. Coherent phonon–photon coupling can therefore reliably provide millisecond-scale quantum storage when high mechanical quality, low temperature, balanced cooperativity, and properly timed control pulses are jointly maintained. Experimental validation remains essential before scalability can be established under realistic device imperfections and non-Markovian noise conditions.

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