Generation and Eight-port Homodyne Characterization of Time-bin Qubits for Continuous-variable Quantum Information Processing

Abstract

We experimentally generate arbitrary time-bin qubits using continuous-wave light. The advantage unique to our qubit is its compatibility with deterministic continuous-variable quantum information processing. This compatibility comes from its optical coherence with continuous waves, well-defined spatio-temporal mode, and frequency spectrum within the operational bandwidth of the current continuous-variable technology. We also demonstrate an efficient scheme to characterize time-bin qubits via eight-port homodyne measurement. This enables the complete characterization of the qubits as two-mode states, as well as a flexible analysis equivalent to the conventional scheme based on a Mach-Zehnder interferometer and photon-detection.

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Cited by in corpus (8)

• Perspective: Toward large-scale fault-tolerant universal photonic quantum computing
• Entanglement swapping between discrete and continuous variables
• Experimental Proof of Nonlocal Wavefunction Collapse for a Single Particle Using Homodyne Measurement
• Repeat-until-success cubic phase gate for universal continuous-variable quantum computation
• Noiseless conditional teleportation of a single photon
• Estimation of Gaussian random displacement using non-Gaussian states
• Time-domain programmable beam-splitter operations for an optical phase-sensitive non-Gaussian state
• Heralded generation of single photons entangled in multiple temporal modes with controllable waveforms