214 citations · 355 across the 8 of their papers we have counts for
8 papers
Can a spin-half particle ever give more than two spots in a Stern-Gerlach experiment? -- the subtle physics of effective Hamiltonians
Noah Linden, Sandu Popescu, Anthony J. Short
We show that a spin-1/2 particle can behave as if it were spin-, and generate spots in a Stern Gerlach measurement (albeit with a smaller gyromagnetic ratio). This arises…
Networks of quantum reference frames and the nature of conserved quantities
Daniel Collins, Carolina Moreira Ferrera, Ismael L. Paiva +1
We show that networks of quantum frames of reference, in which one frame may be used to produce multiple other frames that in their turn prepare systems which may interact with one…
Can apparent superluminal neutrino speeds be explained as a quantum weak measurement?
M. V. Berry, N. Brunner, S. Popescu +1
Probably not.
Virtual qubits, virtual temperatures, and the foundations of thermodynamics
Nicolas Brunner, Noah Linden, Sandu Popescu +1
We argue that thermal machines can be understood from the perspective of `virtual qubits' at `virtual temperatures': The relevant way to view the two heat baths which drive a therm…
Entanglement consumption of instantaneous nonlocal quantum measurements
S. R. Clark, A. J. Connor, D. Jaksch +1
Relativistic causality has dramatic consequences on the measurability of nonlocal variables and poses the fundamental question of whether it is physically meaningful to speak about…
Are all noisy quantum states obtained from pure ones?
L. Henderson, N. Linden, S. Popescu
We ask what type of mixed quantum states can arise when a number of separated parties start by sharing a pure quantum state and then this pure state becomes contaminated by noise.…
Bound Entanglement and Teleportation
N Linden, S Popescu
Recently M. Horodecki, P. Horodecki and R. Horodecki have introduced a set of density matrices of two spin-1 particles from which it is not possible to distill any maximally entang…
Causality Constraints on Nonlocal Quantum Measurements
Sandu Popescu, Lev Vaidman
Consequences of relativistic causality for measurements of nonlocal characteristics of composite quantum systems are investigated. It is proved that verification measurements of en…