activity
19972022
most citedOn the Measurement of Qubits

2.2k citations · 6k across the 51 of their papers we have counts for

collaborators

51 papers

quant-ph2022

Classical Mode Dyanmics for Trapped Ion Diagnostics

Itzal D. U. Terrazas, Daniel F. V. James

In this paper we consider two problems in diagnostics of trapped ion crystals in which an analysis of the ions' collective oscillatory motion yield potentially useful results. When…

quant-ph2022

Quantum Kinematics in Terms of Observable Quantities, and the Chirality of Entangled Two-Qubit States

Daniel F. V. James

We consider the kinematics of bi-partite quantum states as determined by observable quantities, in particular the Bloch vectors of the subsystems. In examining the simplest case of…

quant-ph2019★ 7 cited

Entanglement generation via diffraction

Aaron Z. Goldberg, Daniel F. V. James

Quantum entanglement is an important resource for next-generation technologies. We show that diffracting systems can supplant beam splitters, and more generally interferometric net…

quant-ph2018★ 11 cited

Universal quantum computing with thermal state bosonic systems

Kevin Marshall, Daniel F. V. James, Alexandru Paler +1

Recent development of mixed-state encoding (MSE) allows pure-state logical information to be encoded by a bosonic (continuous-variable) system in mixed physical state. Despite inte…

quant-ph2018★ 51 cited

Quantum-limited Euler angle measurements using anticoherent states

Aaron Z. Goldberg, Daniel F. V. James

Many protocols require precise rotation measurement. Here we present a general class of states that surpass the shot noise limit for measuring rotation around arbitrary axes. We th…

quant-ph2017★ 8 cited

Nonclassical states that generate zero entanglement with a beam splitter

Aaron Z. Goldberg, Daniel F. V. James

Beam splitters are routinely used for generating entanglement. Their entangling properties have been studied extensively, with nonclassicality of the input states a prerequisite fo…