Self-guided tomography of time-frequency qudits
arXiv:2411.19277 · doi:10.1088/2058-9565/adb0ea
Abstract
High-dimensional time-frequency encodings have the potential to significantly advance quantum information science; however, practical applications require precise knowledge of the encoded quantum states, which becomes increasingly challenging for larger Hilbert spaces. Self-guided tomography (SGT) has emerged as a practical and scalable technique for this purpose in the spatial domain. Here, we apply SGT to estimate time-frequency states using a multi-output quantum pulse gate. We achieve fidelities of more than 99\% for 3- and 5-dimensional states without the need for calibration or post-processing. We demonstrate the robustness of SGT against statistical and environmental noise, highlighting its efficacy in the photon-starved regime typical of quantum information applications.
References in corpus (28)
- Integrated Photonic Quantum Technologies
- Security of quantum key distribution using d-level systems
- Quantum state tomography via compressed sensing
- Qudits and high-dimensional quantum computing
- Quantum Cryptography using larger alphabets
- High-dimensional quantum communication: benefits, progress, and future challenges
- Provably-Secure and High-Rate Quantum Key Distribution with Time-Bin Qudits
- Qudit Quantum State Tomography
- Maximum-likelihood estimation of the density matrix
- Photon temporal modes: a complete framework for quantum information science
- Security Proof for Quantum Key Distribution Using Qudit Systems
- A Quantum Pulse Gate based on Spectrally Engineered Sum Frequency Generation
- Overcoming Noise in Entanglement Distribution
- Tailoring nonlinear processes for quantum optics with pulsed temporal-mode encodings
- Demonstration of coherent time-frequency Schmidt mode selection using dispersion-engineered frequency conversion
- Temporal Modes in Quantum Optics: Then and Now
- Robust and Efficient High-dimensional Quantum State Tomography
- Experimental Demonstration of Self-Guided Quantum Tomography
- Spectral density matrix of a single photon measured
- Measuring the single-photon temporal-spectral wave function
- Realization of a multi-output quantum pulse gate for decoding high-dimensional temporal modes of single-photon states
- Temporal-mode measurement tomography of a quantum pulse gate
- Adaptive compressive tomography with no a priori information
- Quantum state estimation with unknown measurements
- Experimental realization of self-guided quantum process tomography
- Single-photon characterization by two-photon spectral interferometry
- Improved non-linear devices for quantum applications
- Pulse characterization at the single-photon level through chronocyclic -function measurements