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of 43
pro vyhledávání: '"Johnsson, Mattias T."'
Autor:
Johnsson, Mattias T., Burgarth, Daniel
Publikováno v:
Physical Review A 109, 012617 (2024)
The quantum harmonic oscillator is one of the most fundamental objects in physics. We consider the case where it is extended to an arbitrary number modes and includes all possible terms that are bilinear in the annihilation and creation operators, an
Externí odkaz:
http://arxiv.org/abs/2304.11776
Publikováno v:
Phys. Rev. A 108, 052403 (2023)
A fundamental problem in quantum engineering is determining the lowest time required to ensure that all possible unitaries can be generated with the tools available, which is one of a number of possible quantum speed limits. We examine this problem f
Externí odkaz:
http://arxiv.org/abs/2304.06617
We consider a spin-$j$ particle coupled to a structured bath of bosonic modes that decay into thermal baths. We obtain an analytic expression for the reduced spin state and use it to investigate non-Markovian spin dynamics. In the heavily overdamped
Externí odkaz:
http://arxiv.org/abs/2112.11711
Autor:
Johnsson, Mattias T., Poggi, Pablo M., Rodríguez, Marco A., Alexander, Rafael N., Twamley, Jason
Publikováno v:
Phys. Rev. Research 3, 023222 (2021)
Large optical nonlinearities can have numerous applications, ranging from the generation of cat-states for optical quantum computation, through to quantum sensing where the sensitivity exceeds Heisenberg scaling in the resources. However, the generat
Externí odkaz:
http://arxiv.org/abs/2101.12364
Publikováno v:
Phys. Rev. Lett. 125, 190403 (2020)
Entangled resources enable quantum sensing that achieves Heisenberg scaling, a quadratic improvement on the standard quantum limit, but preparing large scale entangled states is challenging in the presence of decoherence. We present a quantum control
Externí odkaz:
http://arxiv.org/abs/1908.01120
Autor:
Whitford, Michelle F., Gore, Damian B., Johnsson, Mattias T., Bilgin, Ayse A., Power, Ronika K., Richards, Candace, Withford, Michael J.
Publikováno v:
In Journal of Archaeological Science: Reports August 2021 38
We utilise a magneto-mechanical levitated massive resonator in the quantum regime to prepare highly macroscopic quantum superposition states. Using these macroscopic superpositions we present a novel interferometry protocol to perform absolute gravim
Externí odkaz:
http://arxiv.org/abs/1412.6864
Autor:
Whitford, Michelle F., Wyatt-Spratt, Simon, Gore, Damian B., Johnsson, Mattias T., Power, Ronika K., Rampe, Michael, Richards, Candace, Withford, Michael J.
Publikováno v:
In Journal of Archaeological Science: Reports October 2020 33
Akademický článek
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We examine the feasibility of creating and measuring large relative number squeezing in multicomponent trapped Bose-Einstein condensates. In the absence of multimode effects, this squeezing can be arbitrarily large for arbitrarily large condensates,
Externí odkaz:
http://arxiv.org/abs/1307.6631