Zobrazeno 1 - 10
of 705
pro vyhledávání: '"Costa, Fábio P. P."'
Autor:
Goswami, Kaumudibikash, Roy, Abhinash Kumar, Srivastava, Varun, Perez, Barr, Giarmatzi, Christina, Gilchrist, Alexei, Costa, Fabio
A central problem in the study of open quantum systems is the characterisation of non-Markovian processes, where an environment retains memory of its interaction with the system. A key distinction is whether or not this memory can be simulated classi
Externí odkaz:
http://arxiv.org/abs/2412.01998
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 foremost models, Deutsch's prescription (D-CTCs) and postselected tele
Externí odkaz:
http://arxiv.org/abs/2407.14577
Autor:
Verma, Harshit, Costa, Fabio
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 only one bath at a time and the interaction leads to complete thermali
Externí odkaz:
http://arxiv.org/abs/2403.15186
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 conditions can we say that a set of processes with arbitrary, possibly indefin
Externí odkaz:
http://arxiv.org/abs/2403.10316
Autor:
Giarmatzi, Christina, Jones, Tyler, Gilchrist, Alexei, Pakkiam, Prasanna, Fedorov, Arkady, Costa, Fabio
Current quantum technologies are at the cusp of becoming useful, but still face formidable obstacles such as noise. Noise severely limits the ability to scale quantum devices to the point that they would offer an advantage over classical devices. To
Externí odkaz:
http://arxiv.org/abs/2308.00750
Publikováno v:
Nanotechnology 34 385703 2023
Single layers of transition metal dichalcogenides, such as WSe$_2$ have gathered increasing attention due to their intense electron-hole interactions, being considered promising candidates for developing novel optical applications. Within the few-lay
Externí odkaz:
http://arxiv.org/abs/2303.08957
Publikováno v:
Phys. Rev. A 107, 062208 (2023)
Indefinite causal order is a key feature involved in the study of quantum higher order transformations. Recently, intense research has been focused on possible advantages related to the lack of definite causal order of quantum processes. Quite often
Externí odkaz:
http://arxiv.org/abs/2208.03205
Gravitationally bound neutrons have become an important tool in the experimental searches for new physics, such as modifications to Newton's force or candidates for dark matter particles. Here we include the relativistic effects of mass-energy equiva
Externí odkaz:
http://arxiv.org/abs/2206.08769
Publikováno v:
Class. Quantum Grav. 39, 175007 (2022)
Past studies of the billiard-ball paradox, a problem involving an object that travels back in time along a closed timelike curve (CTC), typically concern themselves with entirely classical histories, whereby any trajectorial effects associated with q
Externí odkaz:
http://arxiv.org/abs/2205.05399
According to the general theory of relativity, time can flow at different rates depending on the configuration of massive objects, affecting the temporal order of events. Recent research has shown that, combined with quantum theory, this gravitationa
Externí odkaz:
http://arxiv.org/abs/2205.00164