Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Brendon W. Lovett"'
Publikováno v:
Quantum, Vol 8, p 1305 (2024)
Nanodevices exploiting quantum effects are critically important elements of future quantum technologies (QT), but their real-world performance is strongly limited by decoherence arising from local `environmental' interactions. Compounding this, as de
Externí odkaz:
https://doaj.org/article/0a6d5226b341499581427d0cd768743c
Publikováno v:
Physical Review X, Vol 14, Iss 1, p 011010 (2024)
While several numerical techniques are available for predicting the dynamics of non-Markovian open quantum systems, most struggle with simulations for very long memory and propagation times, e.g., due to superlinear scaling with the number of time st
Externí odkaz:
https://doaj.org/article/14c79b752b3b45e49293712d354529ac
Autor:
Piper Fowler-Wright, Kristín B. Arnardóttir, Peter Kirton, Brendon W. Lovett, Jonathan Keeling
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033148 (2023)
For a model with many-to-one connectivity it is widely expected that mean-field theory captures the exact many-particle N→∞ limit, and that higher-order cumulant expansions of the Heisenberg equations converge to this same limit whilst providing
Externí odkaz:
https://doaj.org/article/8fc8838dcec748408dbf59a04a59da19
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033078 (2023)
We introduce a general numerical method to compute the dynamics and multitime correlations of chains of quantum systems, where each system may couple strongly to a structured environment. The method combines the process tensor formalism for general (
Externí odkaz:
https://doaj.org/article/9c750267b9a141a0a2e6e4b6b269971a
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract Systems of interacting charges and fields are ubiquitous in physics. Recently, it has been shown that Hamiltonians derived using different gauges can yield different physical results when matter degrees of freedom are truncated to a few low-
Externí odkaz:
https://doaj.org/article/e33d799fba8a4a428526482ba2baa269
Publikováno v:
Quantum, Vol 6, p 847 (2022)
Tracing out the environmental degrees of freedom is a necessary procedure when simulating open quantum systems. While being an essential step in deriving a tractable master equation it represents a loss of information. In situations where there is st
Externí odkaz:
https://doaj.org/article/422b01b528b2427484073c467c4bd071
Autor:
Dominic Gribben, Dominic M. Rouse, Jake Iles-Smith, Aidan Strathearn, Henry Maguire, Peter Kirton, Ahsan Nazir, Erik M. Gauger, Brendon W. Lovett
Publikováno v:
PRX Quantum, Vol 3, Iss 1, p 010321 (2022)
When a quantum system couples strongly to multiple baths, then it is generally no longer possible to describe the resulting system dynamics by simply adding the individual effects of each bath. However, capturing such multibath system dynamics typica
Externí odkaz:
https://doaj.org/article/174db2b787e34628b7ad02bf3974fee0
Autor:
Maria Popovic, Mark T. Mitchison, Aidan Strathearn, Brendon W. Lovett, John Goold, Paul R. Eastham
Publikováno v:
PRX Quantum, Vol 2, Iss 2, p 020338 (2021)
We present a numerically exact method to compute the full counting statistics of heat transfer in non-Markovian open quantum systems, which is based on the time-evolving matrix product operator algorithm. This approach is applied to the paradigmatic
Externí odkaz:
https://doaj.org/article/a84fab46775e4f4499e593fc80f862d6
Autor:
Dominic Gribben, Aidan Strathearn, Jake Iles-Smith, Dainius Kilda, Ahsan Nazir, Brendon W. Lovett, Peter Kirton
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013265 (2020)
The dynamics of a wide range of technologically important quantum systems are dominated by their interaction with just a few environmental modes. Such highly structured environments give rise to long-lived bath correlations that induce complex dynami
Externí odkaz:
https://doaj.org/article/ea8b33cba1b84379a51805c1f250330f
Autor:
Pieter Kok, Brendon W. Lovett
Quantum information processing offers fundamental improvements over classical information processing, such as computing power, secure communication, and high-precision measurements. However, the best way to create practical devices is not yet known.
