Research
IBM Quantum Heron Processor Runs 52-Qubit QFT Circuit
Researchers from ParityQC executed a 52-qubit quantum Fourier transform on IBM Quantum Heron r3, setting a new benchmark for quantum algorithm performance.
Image: IBM
Researchers from ParityQC executed a 52-qubit quantum Fourier transform (QFT) on an IBM Quantum Heron r3 processor, marking the largest such circuit reported to date. The achievement highlights advancements in algorithm design and execution on quantum hardware. Quantum Fourier Transform scaling is notoriously difficult due to routing overhead, circuit depth, and accumulated noise degrading performance at larger sizes. The team used a parity-based circuit construction method to eliminate explicit SWAP-based routing by rethinking how quantum information is represented and propagated. This method reduced errors and enabled a nearly doubling of a previous QFT benchmark set in 2024 on trapped-ion hardware. The work demonstrates how improved algorithms, compilation, and hardware can enhance performance on current quantum systems. Such methods could lead to more efficient implementations of complex algorithms in areas like optimization, simulation, and quantum chemistry. *Source: [ibm](https://research.ibm.com/blog/qft-benchmark)*
Key points
- Researchers from ParityQC demonstrated a 52-qubit quantum Fourier transform (QFT) on an IBM Quantum Heron r3 processor—the largest such circuit reported to date.
- The team used a parity-based circuit construction method to eliminate explicit SWAP-based routing by rethinking how quantum information is represented and propagated.
- The new work nearly doubles a previous QFT benchmark set in 2024 on trapped-ion hardware.
- The IBM Quantum Heron r3 played an important role in enabling these results.
- The researchers say the IBM Quantum Heron r3 is the best hardware around at the moment.
- The team compared the Parity Twine method to highly optimized, state-of-the-art circuits produced using the Qiskit transpiler.
- Parity Twine delivered improved process fidelity, particularly as system size increased.