Classiq & C12 Quantum computing bring carbon nanotube qubits
C12 Quantum Computing
In order to improve fault-tolerant quantum computing, Classiq and C12 have integrated the Callisto digital twin into their quantum software platform. Developers can construct, tune, and simulate CNT spin qubit quantum algorithms using this cooperation. This new modality expands Classiq's ecology beyond superconducting, trapped-ion, neutral atom, cat, and photonic backends.
Why Carbon Nanotubes?
Unlike silicon or diamond-based solid-state technologies, C12 uses a distinct hardware approach. They hang ultra-pure carbon nanotubes over gate electrodes to contain electron spin qubits.
Purity and near-one-dimensional structure are the main benefits of this “carbon path”. C12 wants CNTs to:
Minimise Noise: The material's 1D structure reduces charge and magnetic noise, which restricts qubit performance.
Lower noise levels increase coherence times, the “holy grail” for scaling quantum systems.
Improve Connectivity: Circuit quantum electrodynamics (cQED) uses a superconducting microwave resonator as a quantum bus to communicate qubits across vast distances.
Defining the ‘Digital Twin’: Callisto Discovery Edition
The Callisto Discovery Edition, a high-fidelity digital counterpart of C12's quantum processing unit, is key to this interaction. Digital twins are complicated mathematical models that replicate hardware's physical properties, gate fidelities, and noise profiles, unlike basic simulators in quantum computing.
The Callisto emulator on Classiq lets researchers simulate up to 13 noisy qubits using C12's physical features. We need high-fidelity models for:
Realistic Noise Modeling: The twin models carbon nanotube-relevant phonon interaction, charge noise, and relaxation events.
Advanced Operations: It provides mid-circuit measurements and noisy initialization, essential for error-correction testing. Performance Benchmarking: Before sending a pulse to a dilution refrigerator, developers can test an algorithm on real hardware.
Software Synthesis and Hardware-Agnostic Coding Classiq's synthesis engine and Qmod modeling language simplify quantum programming. Users provide high-level functional needs instead of physically assembling logic gates.
The Classiq engine can now “compile” high-level models for the CNT backend with C12 integration. Program automatically:
Explains CNT architecture's unique relationship. Adjusts the circuit for the C12 hardware's unique gate settings.
Optimizes performance and reduces mistakes.
This advance brings the industry closer to hardware-agnostic. Developers may write code once and deploy it across superconducting, photonic, and now carbon nanotube technology.
A Hardware-Software Co-Design Strategy
This relationship validates spin qubits for the quantum community. Classiq and C12 promote “hardware-software co-design” by releasing the Callisto digital twin early.
The digital twin can influence hardware development instead of waiting for optimal, fault-tolerant technology before designing software. A Classiq spokeswoman said the industry “can no longer ignore” C12's carbon nanotube technology.
Commercialization Path
Although an emulator, the Callisto Discovery Edition bridges C12's upcoming hardware processors. Businesses and academic institutions can quickly use Classiq algorithms and error-mitigation strategies to physical CNT QPUs as they grow.
As the global race for quantum advantage accelerates, the ability to precisely imitate specific architectures may determine which technologies reach commercial utility first. The global development community may now take the “carbon path” to quantum advantage with Classiq's synthesis tools and C12's hardware architecture.
