2019 CAP Congress / Congrès de l'ACP 2019

6 - Experimental Detection of Qubit-Ququart Pseudo-Bound Entanglement using Three Nuclear Spins

4 Jun 2019, 16:55

2m

SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

Poster Competition (Graduate Student) / Compétition affiches (Étudiant(e) 2e ou 3e cycle) Applied Physics and Instrumentation / Physique appliquée et de l'instrumentation (DAPI / DPAI) DAPI Poster Session & Student Poster Competition Finals (8) | Session d'affiches DPIA et finales du concours d'affiches étudiantes (8)

Speaker

Mr Amandeep Singh (Indian Institute of Science Education and Research Mohali)

Description

In this work, we experimentally created and characterized a class of qubit-ququart PPT (positive under partial transpose) entangled states using three nuclear spins on a nuclear magnetic resonance (NMR) quantum information processor. Entanglement detection and characterization for systems with a Hilbert space dimension ≥ 2⊗3 are nontrivial since there are states in such systems which are both PPT as well as entangled. The experimental detection scheme that we devised for the detection of qubit-ququart PPT entanglement was based on the measurement of three Pauli operators with high precision and is a key ingredient of the protocol in detecting entanglement. The family of PPT-entangled states considered in the current study are incoherent mixtures of five pure states. All the five states were prepared with high fidelities and the resulting PPT entangled states were prepared with mean fidelity ≥ 0.95. The entanglement thus detected was validated by carrying out full quantum state tomography (QST).