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License

QGATE Source Available Evaluation License (v1.2)

Copyright © 2024–2026, Ran Buchnik. All rights reserved.

1. Definitions, Purpose & Vision

"The Software" refers to the qgate source code, documentation, simulation data, examples, and all associated files distributed in this repository.

The Software is released under this Source Available License to foster academic reproducibility, peer review, and transparent benchmarking of time-symmetric trajectory filtering on Noisy Intermediate-Scale Quantum (NISQ) hardware.

You are granted a worldwide, royalty-free, non-exclusive, non-transferable copyright license (without the right to sublicense) to use, copy, modify, and redistribute the Software strictly for the following purposes:

Academic & Scientific Research

Publishing papers, running experiments, and open benchmarking of quantum hardware.

Internal Corporate Evaluation

Engineers and researchers at commercial entities may use the Software internally to evaluate its performance. This explicitly includes the right to execute the Software on third-party cloud hardware (e.g., IBM Quantum, AWS Braket) strictly for internal R&D, and the right to redistribute the Software internally within the same legal entity.

Patent Rights

Patent rights are governed separately under Section 5.

3. Commercial Use Restrictions

To sustainably fund the ongoing R&D of this architecture, commercial deployment requires a separate commercial license. You may not use this Software or its derivatives for:

Cloud & Platform Integration

Integrating the Software into commercial Quantum-as-a-Service (QaaS) platforms, cloud APIs, or proprietary hardware control stacks offered to third parties.

Commercial Software Products

Bundling the Software into paid enterprise error-suppression, quantum middleware products, or proprietary benchmarking services.

4. Redistribution & Modification

If you redistribute the Software or any modifications/derivatives thereof, you must:

  • Include a copy of this License.
  • Retain all copyright, patent, and attribution notices.
  • Distribute any modifications under this exact same License.

5. Patent Rights & Intellectual Property

This Software implements methods covered by pending patent applications:

  • Pending U.S. patent applications
  • Pending Israeli patent application
  • Any associated continuations, non-provisional filings, or foreign counterparts.

For Permitted Uses (Section 2): non-exclusive, non-transferable, royalty-free patent license strictly limited to non-commercial research and internal corporate evaluation.

For Commercial Uses (Section 3): no express or implied patent license is granted.

6. Termination

Any violation of the commercial restrictions (Section 3) or redistribution conditions (Section 4) results in automatic and immediate termination of this License, including revocation of any patent grants.

7. Commercial Licensing & Acquisition

For commercial licensing, IP acquisition inquiries, or dual-licensing arrangements, please contact: ranbuch@gmail.com

8. Limitation of Liability & Indemnification

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY ARISING FROM THE USE OF THE SOFTWARE.

9. General Provisions

If any provision of this License is held to be unenforceable, the remaining provisions shall continue in full force and effect. This License shall be governed by the laws of the State of Israel, without regard to conflict of law principles.