Dax Enshan Koh

Teleportation with embezzling catalysts

2024 · Communications Physics

Quantum teleportation is the process of transferring quantum information using classical communication and pre-shared entanglement. This process can benefit from the use of catalysts, which are ancillary entangled states that can enhance teleportation without being …

Near-Optimal Parameter Tuning of Level-1 QAOA for Ising Models

2026 · Quantum

The Quantum Approximate Optimisation Algorithm (QAOA) tackles combinatorial optimisation problems by encoding their solutions into the ground state of an Ising Hamiltonian prepared by a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>p</mml:mi> </mml:math> -level parameterised circuit, with the angles …

Doubly infinite separation of quantum information and communication

2016 · Physical Review A

We prove the existence of (one-way) communication tasks with a subconstant versus superconstant asymptotic gap, which we call ``doubly infinite,'' between their quantum information and communication complexities. We do so by studying the exclusion game …