Experimental Validation of Fully Quantum Fluctuation Theorems Using Dynamic Bayesian Networks

Micadei, Kaonan; Peterson, John P. S.; Souza, Alexandre M.; Sarthour, R. S.; Landi, Gabriel T.; Serra, R. M.; Lutz, Eric

doi:10.1103/physrevlett.127.180603

Cited by 27 publications

(18 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…So, the first way to induce the breakdown of assumption ( 2) is to characterize energy fluctuations by means of a protocol that depends on the initial state, thus entailing a non-linearity of p if (ρ) in ρ. Along this direction, it is worth mentioning the Bayesian network approach recently introduced in [58,139], which involves an initial measurement in the eigenbasis of the system density operator. We also refer to [29] for further discussion.…”

Section: Circumventing the No-go Theorem For Energy Fluctuationsmentioning

confidence: 99%

Kirkwood-Dirac quasiprobability approach to quantum fluctuations: Theoretical and experimental perspectives

Lostaglio¹,

Belenchia²,

Levy³

et al. 2022

Preprint

View full text Add to dashboard Cite

Recent work has revealed the central role played by the Kirkwood-Dirac quasiprobability (KDQ) as a tool to encapsulate non-classical features in the context of condensed matter physics (scrambling, dynamical phase transitions) metrology (standard and post-selected), thermodynamics (power output and fluctuation theorems), foundations (contextuality, anomalous weak values) and more. Given the growing relevance of the KDQ across the quantum sciences, the aim of this work is twofold: first, we clarify the role played by quasiprobabilities in characterising dynamical fluctuations in the presence of measurement incompatibility, and highlight how the KDQ naturally underpins and unifies quantum correlators, quantum currents, Loschmidt echoes and weak values; second, we discuss several schemes to access the KDQ and its non-classicality features, and assess their experimental feasibility in NMR and solid-state platforms. Finally, we analyze the possibility of a 'thermodynamics with quasiprobabilities' in the light of recent no-go theorems limiting traditional treatments.

show abstract

Section: Circumventing the No-go Theorem For Energy Fluctuationsmentioning

confidence: 99%

Kirkwood-Dirac quasiprobability approach to quantum fluctuations: Theoretical and experimental perspectives

Lostaglio¹,

Belenchia²,

Levy³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…It is highly required for quantum sensing [2,3], quantum communication [4,5], quantum simulators [6,7,8], energy harvesting [9,10], quantum thermodynamics [11,12,13] and, of course, in quantum computing [14,15]. It also stimulates a broad recent theoretical analysis [16,17,18,19,20,21,22] and new discussions [23,24,25,26,27,28,29,30,31,32]. The simplest quantum coherence can appear in a single spin as superposition of free-Hamiltonian eigenstates.…”

Section: Introductionmentioning

confidence: 99%

Extraction of autonomous quantum coherences

Slobodeniuk

Novotný

Filip

2022

Quantum

View full text Add to dashboard Cite

Quantum coherence is an essential resource to gain advantage over classical physics and technology. Recently, it has been proposed that a low-temperature environment can induce quantum coherence of a spin without an external coherent pump. We address a critical question if such coherence is extractable by a weak coupling to an output system dynamically affecting back the spin-environment coupling. Describing the entire mechanism, we prove that such extraction is generically possible for output spins (also oscillators or fields) and, as well, in a fermionic analogue of such a process. We compare the internal spin coherence and output coherence over temperature and characteristic frequencies. The proposed optimal coherence extraction opens paths for the upcoming experimental tests with atomic and solid-state systems.

show abstract

“…This channel is adjusted to produce an isentropic variation of the system's internal energy. system's Hamiltonian is associated to an offset of the transverse rf fields with relation to the resonance of 13 C nucleus, given by H C = − (hν/2) σ z [65], with σ , = (x, y, z) standing for the Pauli matrices and we have adjusted the frequency as ν ≈ 1 kHz.…”

mentioning

confidence: 99%

Experimental investigation of a quantum heat engine powered by generalized measurements

Lisboa¹,

Dieguez²,

Guimarães³

et al. 2022

Preprint

View full text Add to dashboard Cite

Experimental Validation of Fully Quantum Fluctuation Theorems Using Dynamic Bayesian Networks

Cited by 27 publications

References 42 publications

Kirkwood-Dirac quasiprobability approach to quantum fluctuations: Theoretical and experimental perspectives

Kirkwood-Dirac quasiprobability approach to quantum fluctuations: Theoretical and experimental perspectives

Extraction of autonomous quantum coherences

Experimental investigation of a quantum heat engine powered by generalized measurements

Contact Info

Product

Resources

About