Measuring ultrafast time-bin qudits

Abstract

Time-bin qudits have emerged as a promising encoding platform in many quantum photonic applications. However, the requirement for efficient single-shot measurement of time-bin qudits instead of reconstructive detection has restricted their widespread use in experiments. Here, we propose an efficient method to measure arbitrary superposition states of time-bin qudits and confirm it up to dimension 4. This method is based on encoding time bins at the picosecond time scale, also known as ultrafast time bins. By doing so, we enable the use of robust and phase-stable single spatial mode temporal interferometers to measure time-bin qudit in different measurement bases.

arXiv comment9 pages, 8 figures

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Cited by in corpus (4)

• A robust approach for time-bin encoded photonic quantum information protocols
• High-dimensional Encoding in the Round-Robin Differential-Phase-Shift Protocol
• Fast data-driven spectrometer with direct measurement of time and frequency for multiple single photons
• Photonic quantum information with time-bins: Principles and applications