Hyperentanglement-enabled Direct Characterization of Quantum Dynamics

Abstract

We use hyperentangled photons to experimentally implement an entanglement-assisted quantum process tomography technique known as Direct Characterization of Quantum Dynamics. Specifically, hyperentanglement-assisted Bell-state analysis enabled us to characterize a variety of single-qubit quantum processes using far fewer experimental configurations than are required by Standard Quantum Process Tomography (SQPT). Furthermore, we demonstrate how known errors in Bell-state measurement may be compensated for in the data analysis. Using these techniques, we have obtained single-qubit process fidelities as high as 98.2% but with one-third the number experimental configurations required for SQPT. Extensions of these techniques to multi-qubit quantum processes are discussed.

This is part of a joint submission with an implementation with Ions: "Experimental characterization of quantum dynamics through many-body interactions" by Daniel Nigg, Julio T. Barreiro, Philipp Schindler, Masoud Mohseni, Thomas Monz, Michael Chwalla, Markus Hennrich and Rainer Blatt

References in corpus (8)

• Beating the channel capacity limit for linear photonic superdense coding
• Quantum Process Tomography: Resource Analysis of Different Strategies
• Remote state preparation: arbitrary remote control of photon polarization
• Choice of Measurement Sets in Qubit Tomography
• Realizing controllable noise in photonic quantum information channels
• Equation of motion for process matrix: Hamiltonian identification and dynamical control of open quantum systems
• Direct Estimation of Single- and Two-Qubit Hamiltonians and Relaxation Rates
• Experimental characterization of quantum dynamics through many-body interactions

Cited by in corpus (11)

• Hyperentanglement concentration for two-photon four-qubit systems with linear optics
• Quantum networks with neutral atom processing nodes
• Multiplexed telecom-band quantum networking with atom arrays in optical cavities
• Quantum-Enhanced Sensing from Hyper-Entanglement
• Benchmarking quantum gates and circuits
• Experimental characterization of quantum dynamics through many-body interactions
• Recovering the full dimensionality of hyperentanglement in collinear photon pairs
• Direct Characterization of Quantum Dynamics with Noisy Ancilla
• Discrimination of correlated and entangling quantum channels with selective process tomography
• Hyperentanglement in Nanophotonic Systems with Discrete Rotational Symmetry
• Quantum teleportation of multiple properties of a single quantum particle