Graphics v2

timeline
    title Single Photon Source Technology Development Eras

    section Era 1 (2000-2005)
        Basic Proof of Concept (g²(0) < 0.5)
            : Universities and research labs
            : Government research agencies
            : Defense contractors (DARPA, etc.)

    section Era 2 (2005-2012)
        Practical QKD (g²(0) < 0.1, 10-30% efficiency, Telecom wavelengths)
            : ID Quantique
            : MagiQ Technologies
            : Toshiba Research
            : Government agencies

    section Era 3 (2010-2018)
        Quantum Sensing (g²(0) < 0.01, >90% indistinguishability)
            : Single Quantum
            : PicoQuant
            : Hamamatsu Photonics
            : Medical imaging companies

    section Era 4 (2015-2022)
        Quantum Computing (g²(0) < 0.001, >99% indistinguishability, >80% efficiency)
            : Xanadu
            : PsiQuantum
            : Orca Computing
            : IBM Quantum Network

    section Era 5 (2020-2025)
        Quantum Networks (g²(0) < 0.0001, >95% efficiency)
            : Quantum Xchange
            : Toshiba Quantum Technology
            : SK Telecom
            : China Telecom

    section Era 6 (2025+)
        Fault-Tolerant Systems (Room temperature, synchronized arrays, commercial applications)
            : Cloud providers (AWS, Google, IBM)
            : Semiconductor companies
            : Consumer electronics
            : Automotive industry

Graphic of device design

mindmap
    root(Push-button single-photon source)
        (Performance)
            Purity
            Indistinguishability
            Spectral stability
            Brightness
            Photon coupling efficiency
            Linewidth
            Jitter
        (Robustness)
            Thermal cycling
            High temperature survivability
            10,000+ hours on time without calibration
        (Packaging)
            Table-top footprint
            Scalability
            Modular design for repairs and upgrades
            Cost under $100k 

Metric	Target	Current Achievement	Status
Single-photon purity	g²(0) < 0.01	✅ Achieved	Complete
Indistinguishability	>95%	✅ 93% (single emitter)	Nearly complete
Cooperativity	C > 1	⚠️ C = 0.55	In progress
Collection efficiency	>90%	⚠️ β = 44%	Needs improvement
Multi-emitter coupling	Demonstrated	✅ 2+ emitters	Complete
Spectral tuning	±50 GHz	✅ ±100 GHz	Exceeded
Operating temperature	>77K	❌ 3K required	Major challenge

Legend: ✅ Achieved, ⚠️ Partial, ❌ Not yet achieved

gantt
    title Single-Photon Source Development Timeline
    dateFormat  YYYY-MM-DD
    section Phase 1: Feasibility
    Temperature studies     :2024-01-01, 2024-06-30
    Cavity optimization     :2024-02-01, 2024-08-31
    Control system design   :2024-04-01, 2024-09-30

    section Phase 2: Prototype
    System integration      :2024-07-01, 2024-12-31
    Performance validation  :2024-10-01, 2025-03-31
    Reliability testing     :2024-11-01, 2025-04-30

    section Phase 3: Product
    Manufacturing setup     :2025-01-01, 2025-08-31
    Customer validation     :2025-06-01, 2025-12-31
    Market launch          :2025-10-01, 2026-03-31