Towards a Device Independent Proof of Indefinite Causal Order with a Quantum Switch
Building on concepts from Bell inequalities, we experimentally realize a device-independent protocol proving that the quantum switch creates an indefinite causal order. This is achieved by entangling the switch’s control qubit with a ancilla photon.
Authors
- Michael Antesberger (ORCID: https://orcid.org/0000-0003-0978-4692)
- Philip Walther (ORCID: https://orcid.org/0000-0002-4964-817X)
- Lee A. Rozema (ORCID: https://orcid.org/0000-0003-4580-7871)
- Huan Cao (ORCID: https://orcid.org/0000-0001-7171-4148)
- Carla M. D. Richter
Institutions
- University of Vienna (AT)
- Vienna Center for Quantum Science and Technology (AT)
- Christian Doppler Laboratory for Thermoelectricity (AT)
Publication Details
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1364/quantum.2025.qm3b.2
- Primary Topic
- Quantum Mechanics and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00