Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Macieszczak, Katarzyna"'
Autor:
Macieszczak, Katarzyna
We introduce occupation uncertainty relations (OURs) for dynamics of a Markov process over discrete configurations. Those are lower bounds on uncertainties of system observables that are time-integrated along stochastic trajectories. The uncertainty
Externí odkaz:
http://arxiv.org/abs/2411.15118
Autor:
Macieszczak, Katarzyna
For Markov processes over discrete configurations, an asymptotic bound on the uncertainty of stochastic fluxes is derived in terms of the harmonic mean of decay rates with respect to the stationary distribution. This bound is necessarily tighter than
Externí odkaz:
http://arxiv.org/abs/2407.09839
Publikováno v:
Phys. Rev. A 109, 022244 (2024)
We analyse the dynamics of metastable Markovian open quantum systems by unravelling their average dynamics into stochastic trajectories. We use quantum reset processes as examples to illustrate metastable phenomenology, including a simple three-state
Externí odkaz:
http://arxiv.org/abs/2308.14107
Publikováno v:
PRB 107, 125424 (2023)
We study the transient dynamics subject to quantum coherence effects of two interacting parallel quantum dots weakly coupled to macroscopic leads. The stationary particle current of this quantum system is sensitive to perturbations much smaller than
Externí odkaz:
http://arxiv.org/abs/2212.07799
Autor:
Macieszczak, Katarzyna
In this work, we introduce an information-theoretic approach for considering changes in dynamics of finitely dimensional open quantum systems governed by master equations. This experimentally motivated approach arises from considering how the average
Externí odkaz:
http://arxiv.org/abs/2104.05095
We study in detail an open quantum generalisation of a classical kinetically constrained model -- the East model -- known to exhibit slow glassy dynamics stemming from a complex hierarchy of metastable states with distinct lifetimes. Using the recent
Externí odkaz:
http://arxiv.org/abs/2010.15304
Publikováno v:
Phys. Rev. A 103, 042204 (2021)
We consider Markovian dynamics of a finitely dimensional open quantum system featuring a weak unitary symmetry, i.e., when the action of a unitary symmetry on the space of density matrices commutes with the master operator governing the dynamics. We
Externí odkaz:
http://arxiv.org/abs/2010.08492
Publikováno v:
Phys. Rev. Research 3, 033047 (2021)
We present a general theory of classical metastability in open quantum systems. Metastability is a consequence of a large separation in timescales in the dynamics, leading to the existence of a regime when states of the system appear stationary, befo
Externí odkaz:
http://arxiv.org/abs/2006.01227
Publikováno v:
Phys. Rev. A 101, 043847 (2020)
We study the preparation of coherent quantum states in a two-photon micromaser for applications in quantum metrology. While this setting can be in principle realized in a host of physical systems, we consider atoms interacting with the field of a cav
Externí odkaz:
http://arxiv.org/abs/1906.03933
Autor:
Macieszczak, Katarzyna
In this thesis we explore aspects of dynamics of open quantum systems related to coherence and quantum correlations - necessary resources for enhanced quantum metrology and quantum computation. We first discuss limits to the precision of parameter es
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719460