Photon-bunching measurement after 2x25km of standard optical fibers
arXiv:quant-ph/0408092 · doi:10.1103/PhysRevA.71.042335
Abstract
To show the feasibility of a long distance partial Bell-State measurement, a Hong-Ou-Mandel experiment with coherent photons is reported. Pairs of degenerate photons at telecom wavelength are created by parametric down conversion in a periodically poled lithium niobate waveguide. The photon pairs are separated in a beam-splitter and transmitted via two fibers of 25km. The wave-packets are relatively delayed and recombined on a second beam-splitter, forming a large Mach-Zehnder interferometer. Coincidence counts between the photons at the two output modes are registered. The main challenge consists in the trade-off between low count rates due to narrow filtering and length fluctuations of the 25km long arms during the measurement. For balanced paths a Hong-Ou-Mandel dip with a visibility of 47.3% is observed, which is close to the maximal theoretical value of 50% developed here. This proves the practicability of a long distance Bell state measurement with two independent sources, as e.g. required in an entanglement swapping configuration in the scale of tens of km.
arXiv comment6 pages, 5 figures
References in corpus (8)
- Experimental quantum teleportation
- On Bell measurements for teleportation
- Long distance quantum teleportation of qubits from photons at 1300 nm to photons at 1550 nm wavelength
- Security of Quantum Key Distribution with Entangled Photons Against Individual Attacks
- Long distance quantum teleportation in a quantum relay configuration
- Quantum relays and noise suppression using linear optics
- Experimental test of non-local quantum correlation in relativistic configurations
- Mode-Locked Two-Photon States
Cited by in corpus (14)
- On the genesis and evolution of Integrated Quantum Optics
- Generation of 1.5-um band time-bin entanglement using spontaneous fiber four-wave mixing and planar lightwave circuit interferometers
- High coherence photon pair source for quantum communication
- High-visibilty two-photon interference at a telecom wavelength using picosecond regime separated sources
- Cross time-bin photonic entanglement for quantum key distribution
- Compact source of narrow-band counterpropagating polarization-entangled photon pairs using a single dual-periodically poled crystal
- Modal, Spectral, and Polarization Entanglement in Guided-Wave Parametric Down-Conversion
- Quantum superposition and entanglement of mesoscopic plasmons
- Two-photon interference of temporally separated photons
- Theory and experiment of entanglement in a quasi-phase-matched two-crystal source
- Implementation of quantum synchronization over a 20-km fiber distance based on frequency-correlated photon pairs and HOM interference
- Two-photon interferences of weak coherent lights
- Two-boson quantum interference in time
- Narrow-band photonic quantum entanglement with counterpropagating domain engineering