Vectorized Quantum Control Riscv

---
name: vectorized-quantum-control-riscv
description: >
  Vectorized Quantum Control Processor (QCP) architecture using RISC-V Vector
  Extension with quantum-oriented extensions. Addresses up to 128 qubits per
  instruction with hardware-based halt-resume protocol within 80ns. Use when:
  designing quantum control processors, scaling qubit control systems, RISC-V
  quantum extensions, mid-circuit measurement feedback, or scalable quantum
  control architectures. arXiv: 2607.07372
---

# Vectorized Quantum Control: RISC-V Architecture

## Core Concept

Build Quantum Control Processors (QCPs) on RISC-V Vector (RVV) engine with quantum-oriented extension, leveraging RVV's high parallelism to address up to 128 qubits in a single instruction.

## Key Findings (arXiv: 2607.07372)

- **128 qubits per instruction** via RVV parallelism
- **80ns halt-resume** protocol for mid-circuit measurement feedback
- **2.52x speedup** over baseline in program execution time
- Excellent scalability for large qubit systems

## Architecture

1. **RVV-Based QCP**: RISC-V Vector engine with quantum-oriented ISA extension
2. **Parameterized Rotation Instructions**: Embed rotation parameters directly in ISA for dynamic gate tuning
3. **Hardware Halt-Resume Protocol**: 80ns resume latency for mid-circuit measurements
4. **FPGA Prototype**: Validated on both RISC-V toolchains and FPGA

## Instruction Design

- Vector-load qubit addresses (up to 128 per instruction)
- Embed parameterized rotation info for hybrid quantum-classical programs
- Hardware interrupt for measurement results → resume within 80ns

## Pitfalls

- Existing QCP designs use customized instruction sets, limiting reuse
- Addressing and scheduling in highly scalable scenarios is a critical challenge
- Mid-circuit measurement requires fast feedback loops (<100ns)

## Activation Keywords

- vectorized quantum control, RISC-V quantum, QCP architecture, qubit addressing, mid-circuit measurement, halt-resume protocol, scalable quantum control