Abstract
Multiphoton quantum interference is a one of the two technology platforms in which a quantum advantage has been demonstrated [1]. In these systems, a large-scale quantum state forms due to repeated effective interactions of photons (through the generalized Hong-Ou-Mandel effect) at the nodes of a photonic processor, resulting in a state that intrinsically possesses quantum complexity.
A key question is how to validate the formation of a large-scale quantum state. One aspect of this is to measure whether the output quantum state is entangled – a necessary but not sufficient criterion for complexity.
In this work, we derive and demonstrate an entanglement witness for large-scale optical quantum interference, and experimentally use this to demonstrate the presence of entanglement in our optical processor [2].
[1] Zhong et al., Science 370, 1460 – 1463 (2020)
[2] Taballione et al., ArXiv 2012.05673 (2021)
A key question is how to validate the formation of a large-scale quantum state. One aspect of this is to measure whether the output quantum state is entangled – a necessary but not sufficient criterion for complexity.
In this work, we derive and demonstrate an entanglement witness for large-scale optical quantum interference, and experimentally use this to demonstrate the presence of entanglement in our optical processor [2].
[1] Zhong et al., Science 370, 1460 – 1463 (2020)
[2] Taballione et al., ArXiv 2012.05673 (2021)
| Original language | English |
|---|---|
| Publication status | Published - 12 Oct 2021 |
| Event | 44th Annual Meeting NNV AMO Lunteren 2021 - De Werelt, Lunteren, Netherlands Duration: 12 Oct 2021 → 13 Oct 2021 Conference number: 44 https://www.ru.nl/amolunteren/ |
Conference
| Conference | 44th Annual Meeting NNV AMO Lunteren 2021 |
|---|---|
| Country/Territory | Netherlands |
| City | Lunteren |
| Period | 12/10/21 → 13/10/21 |
| Internet address |
Keywords
- Quantum
- Entanglement witness
- Single photon
- Integrated photonics