Thermodynamic advancement in the causally inseparable occurrence of thermal maps

• URL: http://arxiv.org/abs/2003.01464v1
• Date: Tue, 3 Mar 2020 11:45:52 GMT
• Title: Thermodynamic advancement in the causally inseparable occurrence of thermal maps
• Authors: Tamal Guha, Mir Alimuddin and Preeti Parashar
• Abstract summary: We show that the application of two different thermal channels in the causally inseparable order can enhance the potential to extract work. This enhancement is also possible even without assigning any thermodynamic resource value to the controlling qubit.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum mechanics allows the occurrence of events without having any definite causal order. Here, it is shown that the application of two different thermal channels in the causally inseparable order can enhance the potential to extract work, in contrast to any of their definite (separable) order of compositions. This enhancement is also possible even without assigning any thermodynamic resource value to the controlling qubit. Further, we provide the first non-trivial example of causal enhancement with non-unital pin maps, for which it is still not clear how to obtain a superposition of path structure (under definite causal order). Hence, it may be a potential candidate to accentuate the difference between superposition of time and superposition of path.

Related papers

• Causal Layering via Conditional Entropy [85.01590667411956]
  Causal discovery aims to recover information about an unobserved causal graph from the observable data it generates. We provide ways to recover layerings of a graph by accessing the data via a conditional entropy oracle.
  arXiv  Detail & Related papers  (2024-01-19T05:18:28Z)
• Doubly Stochastic Graph-based Non-autoregressive Reaction Prediction [59.41636061300571]
  We propose a new framework called that combines two doubly self-attention mappings to obtain electron redistribution predictions. We show that our approach consistently improves the predictive performance of non-autoregressive models.
  arXiv  Detail & Related papers  (2023-06-05T14:15:39Z)
• Fermionic one-body entanglement as a thermodynamic resource [0.0]
  We show that entanglement of a two-mode fermionic state can be used as a genuine quantum resource in open-system thermodynamic processes. We thus demonstrate that quantum thermodynamics can shed light on the nature of fermionic entanglement and the operational meaning of the different notions used to define it.
  arXiv  Detail & Related papers  (2022-12-21T11:47:35Z)
• Non-Abelian symmetry can increase entanglement entropy [62.997667081978825]
  We quantify the effects of charges' noncommutation on Page curves. We show analytically and numerically that the noncommuting-charge case has more entanglement.
  arXiv  Detail & Related papers  (2022-09-28T18:00:00Z)
• Reassessing thermodynamic advantage from indefinite causal order [0.0]
  Indefinite causal order is a key feature involved in the study of quantum higher order transformations. We show that indefinite causal order is not necessary for the reported increase in free energy and ergotropy.
  arXiv  Detail & Related papers  (2022-08-05T14:41:49Z)
• Causal games of work extraction with indefinite causal order [0.0]
  We consider the existence of two cooperating local Maxwell's demons which try to exploit the presence of global correlations and indefinite causal order. We prove that it is possible to have a larger probability to lower the local energy to zero if causal inequalities are violated, and that can be extracted more average work with respect to a definite causal order.
  arXiv  Detail & Related papers  (2022-08-04T09:47:12Z)
• Observation-dependent suppression and enhancement of two-photon coincidences by tailored losses [68.8204255655161]
  Hong-Ou-Mandel (HOM) effect can lead to a perfect suppression of two-particle coincidences between the output ports of a balanced beam splitter. In this work, we demonstrate experimentally that the two-particle coincidence statistics of two bosons can instead be seamlessly tuned to substantial enhancement. Our findings reveal a new approach to harnessing non-Hermitian settings for the manipulation of multi-particle quantum states.
  arXiv  Detail & Related papers  (2021-05-12T06:47:35Z)
• Qubit thermodynamics far from equilibrium: two perspectives about the nature of heat and work in the quantum regime [68.8204255655161]
  We develop an alternative theoretical framework for the thermodynamic analysis of two-level systems. We observe the appearance of a new term of work, which represents the energy cost of rotating the Bloch vector in presence of the external field that defines the local Hamiltonian. In order to illustrate our findings we study, from both perspectives, matter-radiation interaction processes for two different systems.
  arXiv  Detail & Related papers  (2021-03-16T09:31:20Z)
• Lower Bound on Irreversibility in Thermal Relaxation of Open Quantum Systems [4.111899441919164]
  Quantifying the degree of irreversibility by entropy production, we prove that the irreversibility of the thermal relaxation is lower-bounded by a relative entropy between the unitarily-evolved state and the final state. Our finding refines the second law of thermodynamics and reveals a universal feature of thermal relaxation processes.
  arXiv  Detail & Related papers  (2021-02-15T05:17:11Z)
• Finite Block Length Analysis on Quantum Coherence Distillation and Incoherent Randomness Extraction [64.04327674866464]
  We introduce a variant of randomness extraction framework where free incoherent operations are allowed before the incoherent measurement. We show that the maximum number of random bits extractable from a given quantum state is precisely equal to the maximum number of coherent bits that can be distilled from the same state. Remarkably, the incoherent operation classes all admit the same second order expansions.
  arXiv  Detail & Related papers  (2020-02-27T09:48:52Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.