Quantum algorithms and applications for open quantum systems

LH Delgado-Granados, TJ Krogmeier… - Chemical …, 2024 - ACS Publications
Accurate models for open quantum systems─ quantum states that have nontrivial
interactions with their environment─ may aid in the advancement of a diverse array of fields …

Stabilizing open quantum batteries by sequential measurements

S Gherardini, F Campaioli, F Caruso, FC Binder - Physical Review Research, 2020 - APS
A quantum battery is a work reservoir that stores energy in quantum degrees of freedom.
When immersed in an environment, an open quantum battery needs to be stabilized against …

The Ising critical quantum Otto engine

G Piccitto, M Campisi, D Rossini - New Journal of Physics, 2022 - iopscience.iop.org
We study a four-stroke Otto engine whose working fluid is a quantum Ising chain. The
thermodynamic cycle consists in sweeps of the transverse magnetic field occurring in …

Speed-ups to isothermality: Enhanced quantum thermal machines through control of the system-bath coupling

N Pancotti, M Scandi, MT Mitchison, M Perarnau-Llobet - Physical Review X, 2020 - APS
Isothermal transformations are minimally dissipative but slow processes, as the system
needs to remain close to thermal equilibrium along the protocol. Here, we show that …

Identifying optimal cycles in quantum thermal machines with reinforcement-learning

PA Erdman, F Noé - npj Quantum Information, 2022 - nature.com
The optimal control of open quantum systems is a challenging task but has a key role in
improving existing quantum information processing technologies. We introduce a general …

Simulating Markovian open quantum systems using higher-order series expansion

X Li, C Wang - arxiv preprint arxiv:2212.02051, 2022 - arxiv.org
We present an efficient quantum algorithm for simulating the dynamics of Markovian open
quantum systems. The performance of our algorithm is similar to the previous state-of-the-art …

Quadratic enhancement in the reliability of collective quantum engines

N Jaseem, S Vinjanampathy, V Mukherjee - Physical Review A, 2023 - APS
We study fluctuations in many-body quantum heat engines operating in the presence of
collective system-bath interactions. We show that collective effects in open quantum systems …

Model-free optimization of power/efficiency tradeoffs in quantum thermal machines using reinforcement learning

PA Erdman, F Noé - PNAS nexus, 2023 - academic.oup.com
A quantum thermal machine is an open quantum system that enables the conversion
between heat and work at the micro or nano-scale. Optimally controlling such out-of …

Maximum power and corresponding efficiency for two-level heat engines and refrigerators: optimality of fast cycles

PA Erdman, V Cavina, R Fazio, F Taddei… - New Journal of …, 2019 - iopscience.iop.org
We study how to achieve the ultimate power in the simplest, yet non-trivial, model of a
thermal machine, namely a two-level quantum system coupled to two thermal baths. Without …

Finite-time quantum Stirling heat engine

SH Raja, S Maniscalco, GS Paraoanu… - New Journal of …, 2021 - iopscience.iop.org
We study the thermodynamic performance of a finite-time non-regenerative quantum Stirling-
like cycle used as a heat engine. We consider specifically the case in which the working …