6 papers · 1 filter
Resource theory of coherence in continuous position basis from measurement-induced dephasing
Karol Sajnok, Fabio Costa
We develop a resource-theoretic framework for quantum coherence directly in continuous basis, with emphasis on the position representation. Since position eigenstates are non-norma…
Quantum metasurfaces as probes of vacuum particle content
Germain Tobar, Joshua Foo, Sofia Qvarfort +3
The quantum vacuum of the electromagnetic field is inherently entangled across distinct spatial sub-regions, resulting in entangled particle content across these sub-regions. Howev…
Continuous operations on non-Markovian processes
Fabio Costa, Jing Yang
Continuous measurements are central to quantum control and sensing, yet lack a model-independent operational description that can be applied to arbitrary non-Markovian processes wi…
Quantum state tomography on closed timelike curves using weak measurements
Lachlan G. Bishop, Fabio Costa, Timothy C. Ralph
Any given prescription of quantum time travel necessarily endows a Hilbert space to the chronology-violating (CV) system on the closed timelike curve (CTC). However, under the two…
A de Finetti theorem for quantum causal structures
Fabio Costa, Jonathan Barrett, Sally Shrapnel
What does it mean for a causal structure to be `unknown'? Can we even talk about `repetitions' of an experiment without prior knowledge of causal relations? And under what conditio…
Measuring two temperatures using a single thermometer
Harshit Verma, Fabio Costa
We consider the question: Is it possible to measure two temperatures simultaneously using a single thermometer? Under common circumstances, where the thermometer can interact with…