Reservoir-engineering shortcuts to adiabaticity

Menu, Raphaël; Langbehn, Josias; Koch, Christiane P.; Morigi, Giovanna

doi:10.1103/physrevresearch.4.033005

Cited by 8 publications

(2 citation statements)

References 49 publications

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“…(b) Certain control task require a change of entropy, such as reset or thermalization [56,58,172,173,230,564,565]. Tasks that do not require a change of entropy may still benefit from it, for example by reaching the target while actively cooling [320,419]. (c) Quantum control can be used to optimize the operation cycle of heat engines and refrigerators [173,216,327,632].…”

Section: Quantum Thermodynamicsmentioning

confidence: 99%

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Koch

Boscain

Calarco

et al. 2022

EPJ Quantum Technol.

Self Cite

213

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Quantum optimal control, a toolbox for devising and implementing the shapes of external fields that accomplish given tasks in the operation of a quantum device in the best way possible, has evolved into one of the cornerstones for enabling quantum technologies. The last few years have seen a rapid evolution and expansion of the field. We review here recent progress in our understanding of the controllability of open quantum systems and in the development and application of quantum control techniques to quantum technologies. We also address key challenges and sketch a roadmap for future developments.

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Section: Quantum Thermodynamicsmentioning

confidence: 99%

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Koch

Boscain

Calarco

et al. 2022

EPJ Quantum Technol.

Self Cite

213

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show abstract

“…Nevertheless, there are counterexamples where the coupling with an external bath can even lead to entanglement between the system's constituents [7][8][9][10][11]. The concepts underlying this environment-induced quantum coherence have been used to design protocols for quantum state preparation and computing using dissipation [12][13][14][15][16] putting forward the need to systematically understand what are the features of an environment that are resources, and which are instead detrimental to quantum coherent dynamics. An important resource are decoherence free subspaces, namely, subspaces of the system's Hilbert space that are effectively decoupled from the environment because of destructive interference [17,18].…”

Section: Introductionmentioning

confidence: 99%

Unravelling the dynamics of entanglement in a non-Markovian bath

Roy¹,

Otto²,

Menu³

et al. 2023

Preprint

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We analyse the dynamics of quantum correlations between two qubits coupled to a linear chain of oscillators. The qubits undergo an effective open-system dynamics in the presence of a non-Markovian reservoir, constituted by the chain's vibrations. The model is amenable to an analytical solution when the chain is initially in a thermal state. We study the dynamics of the qubits concurrence starting from a separable state and assuming that the chain spectrum is gapped. We identify three relevant regimes that depend on the strength of the qubit-chain coupling in relation to the spectral gap. These are (i) the weak coupling regime, where the qubits are entangled at the asymptotics; (ii) the strong coupling regime, where the concurrence can exhibit collapses followed by revivals with exponentially attenuated amplitude; and (iii) the thermal damping regime, where the concurrence rapidly vanishes due to the chain's thermal excitation. In all cases, if entanglement is generated, this occurs after a finite time has elapsed. This time scale depends exponentially on the qubits distance and is determined by the spectral properties of the chain. Entanglement irreversible decay, on the other hand, is due to the dissipative effect induced by the coupling with the chain and is controlled by the coupling strength between the chain and qubits. This study identifies the resources of an environment for realising quantum coherent dynamics of open systems.

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Simulating the Landau–Zener sweep in deeply sub-Ohmic environments

Kahlert,

Link,

Hartmann

et al. 2024

The Journal of Chemical Physics

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With the goal to study dissipative Landau–Zener (LZ) sweeps in realistic solid-state qubits, we utilize novel methods from non-Markovian open quantum system dynamics that enable reliable long-time simulations for sub-Ohmic environments. In particular, we combine a novel representation of the dynamical propagator, the uniform time evolving matrix product operator method, with a stochastic realization of finite temperature fluctuations. The latter greatly reduces the computational cost for the matrix product operator approach, enabling convergence in the experimentally relevant deeply sub-Ohmic regime. Our method allows the exact simulation of dynamical protocols with long operation times, such as the LZ sweep, in challenging parameter regimes that are realized in current experimental platforms.

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Reservoir-engineering shortcuts to adiabaticity

Cited by 8 publications

References 49 publications

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Unravelling the dynamics of entanglement in a non-Markovian bath

Simulating the Landau–Zener sweep in deeply sub-Ohmic environments

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