공진기 전기-광역학(Electro-Optomechanics) 초전도-광학 양자 변환 & 1,000Hz 0-Alloc C# 포논 브리지 결맞음 서보 엔진

using System;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;

namespace ZeliDesk.Stem.QuantumTransduction
{
    /// <summary>
    /// 마이크로파-광학 공진 모드 오차 계측 데이터 (스택 할당 0-Alloc)
    /// </summary>
    [StructLayout(LayoutKind.Sequential, Pack = 8)]
    public readonly struct TransducerPhaseErrors
    {
        public readonly double MicrowaveDetuningHz; // 마이크로파 LC 오차 (Hz)
        public readonly double OpticalDetuningHz;    // 광학 캐비티 오차 (Hz)
        public readonly double MicrowavePumpPowerMw; // 마이크로파 펌프 파워
        public readonly double OpticalPumpPowerMw;    // 광학 펌프 파워

        public TransducerPhaseErrors(double mwErr, double optErr, double mwPwr, double optPwr)
        {
            MicrowaveDetuningHz = mwErr;
            OpticalDetuningHz = optErr;
            MicrowavePumpPowerMw = mwPwr;
            OpticalPumpPowerMw = optPwr;
        }
    }

    /// <summary>
    /// 피에조 튜너 전압 및 펌프 레이저 보정 명령
    /// </summary>
    public ref struct TransducerTunerCommand
    {
        public double OpticalPiezoVoltageV;  // 광학 공진기 피에조 전압 (V)
        public double MicrowaveVaractorBiasV; // LC 공진기 바랙터 전압 (V)
        public double CurrentQuantumEfficiency;
        public bool ConversionLocked;

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public TransducerTunerCommand(double vOpt, double vMw, double eff, bool locked)
        {
            OpticalPiezoVoltageV = vOpt;
            MicrowaveVaractorBiasV = vMw;
            CurrentQuantumEfficiency = eff;
            ConversionLocked = locked;
        }
    }

    /// <summary>
    /// 1,000Hz 무할당 전기-광역학 양자 변환 서보 엔진
    /// </summary>
    public ref struct ElectroOptomechanicalEngine
    {
        private const double MechanicalFreqHz = 1.5e9; // 1.5 GHz 기계 공진 주파수
        private const double GammaM = 1500.0;           // 기계 감쇠율 (Hz)
        private const double KappaE = 1.2e6;            // 마이크로파 붕괴율 (Hz)
        private const double KappaO = 8.5e5;            // 광학 붕괴율 (Hz)

        private double _intMwDetuning;
        private double _intOptDetuning;

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public void ExecuteControlCycle(
            in TransducerPhaseErrors sensor,
            out TransducerTunerCommand command)
        {
            // 1. 공진 디튜닝 오차 적분 (PI 제어 루프)
            _intMwDetuning += sensor.MicrowaveDetuningHz * 0.001;
            _intOptDetuning += sensor.OpticalDetuningHz * 0.001;

            double kpMw = 0.0025;
            double kiMw = 0.045;
            double kpOpt = 0.0018;
            double kiOpt = 0.038;

            double varactorV = kpMw * sensor.MicrowaveDetuningHz + kiMw * _intMwDetuning;
            double piezoV = kpOpt * sensor.OpticalDetuningHz + kiOpt * _intOptDetuning;

            varactorV = Math.Clamp(varactorV, -15.0, 15.0);
            piezoV = Math.Clamp(piezoV, -75.0, 75.0);

            // 2. 협동도(Cooperativity) 및 실시간 양자 변환 효율 계산
            double gE = 2.5e4 * Math.Sqrt(Math.Max(0.0, sensor.MicrowavePumpPowerMw));
            double gO = 1.8e4 * Math.Sqrt(Math.Max(0.0, sensor.OpticalPumpPowerMw));

            double cE = (4.0 * gE * gE) / (KappaE * GammaM);
            double cO = (4.0 * gO * gO) / (KappaO * GammaM);

            double denom = 1.0 + cE + cO;
            double efficiency = (0.85 * 0.90 * 4.0 * cE * cO) / (denom * denom);
            efficiency = Math.Clamp(efficiency, 0.0, 0.765); // 최대 이론 한계 76.5%

            bool locked = (Math.Abs(sensor.MicrowaveDetuningHz) < 5000.0) && (Math.Abs(sensor.OpticalDetuningHz) < 3000.0);

            command = new TransducerTunerCommand(piezoV, varactorV, efficiency, locked);
        }
    }
}