Entanglement generation using a controlled-phase gate for time-bin qubits
Abstract
Quantum logic gates are important for quantum computation and quantum information processing in numerous physical systems. Although time-bin qubits are suitable for quantum communication over optical fiber, many essential quantum logic gates for them have not yet been realized. Here, we demonstrated a controlled-phase (C-Phase) gate for time-bin qubits that uses a 2 × 2 optical switch based on an electro-optic modulator. A Hong-Ou-Mandel interference measurement showed that the switch could work as a time-dependent beam splitter with a variable splitting ratio. We confirmed that two independent time-bin qubits were entangled as a result of C-Phase gate operation with the switch.
- Publication:
-
Applied Physics Express
- Pub Date:
- September 2018
- DOI:
- 10.7567/APEX.11.092801
- arXiv:
- arXiv:2003.04483
- Bibcode:
- 2018APExp..11i2801L
- Keywords:
-
- Quantum Physics
- E-Print:
- Appl. Phys. Express 11 092801 (2018)