Entanglement-preserving photonic switching: Full cross-bar operation with quantum data streams

Neal N. Oza, Yu Ping Huang, Prem Kumar

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

As the field of quantum communications matures and adopts larger network topologies, it will require switches capable of multiplexing and demultiplexing entangled photons between network nodes. Such switches will need to operate at high speeds, with low loss, and minimal signal-band noise, while also retaining the quantum state of the routed photons. We present an all-optical, fiber-based, dual-in, dual-out switch that has a switching window of 45 ps and an insertion loss of <3.0 dB. In addition, the switch introduces minimal degradation (<1.5) to the quantum state of the routed entangled photons. As a test of the switch's utility, we demultiplex a single quantum channel from a 6.5-GHz dual-channel quantum data stream. The recovered quantum state exhibits a fidelity of 96.2± 1.2 with the prepared state.

Original languageEnglish
Article number6678557
Pages (from-to)356-359
Number of pages4
JournalIEEE Photonics Technology Letters
Volume26
Issue number4
DOIs
StatePublished - 15 Feb 2014

Keywords

  • Quantum communications
  • crossphase modulation
  • nonlinear optical loop mirror
  • optical fiber communication
  • optical switches

Fingerprint

Dive into the research topics of 'Entanglement-preserving photonic switching: Full cross-bar operation with quantum data streams'. Together they form a unique fingerprint.

Cite this