Quantum non-Gaussianity of frequency up-converted single photons

Abstract

Nonclassical states of light are an important resource in today's quantum communication and metrology protocols. Quantum up-conversion of nonclassical states is a promising approach to overcome frequency differences between disparate subsystems within a quantum information network. Here, we present the generation of heralded narrowband single photons at 1550 nm via cavity enhanced spontaneous parametric downconversion (SPDC) and their subsequent up-conversion to 532 nm. Quantum non-Gaussianity (QNG), which is an important feature for applications in quantum information science, was experimentally certified for the first time in frequency up-converted states.

9 pages, 6 figures

References in corpus (5)

• Quantum Teleportation Between Distant Matter Qubits
• A No-Go Theorem for Gaussian Quantum Error Correction
• Reversible state transfer between light and a single trapped atom
• Detecting quantum non-Gaussianity via the Wigner function
• Weak-signal conversion from 1550nm to 532nm with 84% efficiency

Cited by in corpus (8)

• Squeezed states of light and their applications in laser interferometers
• Quantum Non-Gaussian Multiphoton Light
• Strongly squeezed states at 532 nm based on frequency up-conversion
• Negative Wigner function at telecommunication wavelength from homodyne detection
• Efficient construction of witnesses of stellar rank of nonclassical states of light
• Unconditional entanglement interface for quantum networks
• Quantum non-Gaussianity criteria based on vacuum probabilities of original and attenuated state
• Non-classical non-Gaussian state of a mechanical resonator via selectively incoherent damping in three-mode optomechanical systems