Abstract
We experimentally investigate the properties of hyperentangled states displaying simultaneous entanglement in multiple degrees of freedom and find that Bell tests beyond the standard Clauser-Horne-Shimony-Holt inequality can reveal a higher-dimensional nature in a device-independent way. Specifically, we show that hyperentangled states possess more than just simultaneous entanglement in separate degrees of freedom but also entanglement in a higher-dimensional Hilbert space. We also verify the steerability of hyperentangled quantum states by steering different photonic degrees of freedom.
| Original language | English |
|---|---|
| Article number | 054025 |
| Journal | Physical Review Applied |
| Volume | 18 |
| Issue number | 5 |
| DOIs | |
| State | Published - Nov 2022 |
Funding
We thank Michael Wayne and Kristina Meier for discussions regarding the design of the time-bin sorting circuit and Chris Chopp for assistance in its prototyping and the printed-circuit-board layout. C.K.Z., J.C.C., and P.G.K. acknowledge support from the National Aeronautics and Space Administration (NASA) under Grants No. NNX13AP35A and No. NNX16AM26G. J.C.C. acknowledges support from a U.S. Department of Defence, Office of Naval Research, National Defense Science and Engineering Graduate Fellowship (NDSEG) and from the U.S. Department of Energy (DOE), Office of Science, Office of Advanced Scientific Computing Research, through the Transparent Optical Quantum Networks for Distributed Science Program (Field Work Proposals ERKJ355). P.G.K. and E.C. are partially supported by the National Science Foundation (NSF) Quantum Leap Challenge Institute for Hybrid Quantum Architectures and Networks, Award No. 2016136. This work was partially performed at Oak Ridge National Laboratory (ORNL). ORNL is managed by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725, for the U.S. Department of Energy (DOE).
| Funders | Funder number |
|---|---|
| Transparent Optical Quantum Networks for Distributed Science Program | ERKJ355 |
| National Science Foundation | 2016136 |
| U.S. Department of Defense | |
| Office of Naval Research | |
| U.S. Department of Energy | |
| National Aeronautics and Space Administration | NNX13AP35A, NNX16AM26G |
| Office of Science | |
| Advanced Scientific Computing Research | |
| Oak Ridge National Laboratory | DE-AC05-00OR22725 |
| National Defense Science and Engineering Graduate |