Article
Physics, Multidisciplinary
Aritra Ghosh, Malay Bandyopadhyay, Chandrasekhar Bhamidipati
Summary: The research developed a geometric formalism for describing quantum thermodynamics of nanoscale systems and showed that non-equilibrium steady states are points on control parameter spaces generated by the steady state Massieu-Planck function. By altering the system's boundary conditions, it is possible to transition the system from one steady state to another, and moving along the geodesics of the friction tensor results in a minimum increase of free entropy.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Physics, Fluids & Plasmas
Sandipan Mohanta, Sushant Saryal, Bijay Kumar Agarwalla
Summary: We demonstrate a hierarchy in the relative fluctuation of currents for cold, hot, and work terminals in steady-state autonomous absorption refrigerators. This hierarchy leads to a bound on cooling efficiency that is tighter than previously obtained bounds.
Article
Chemistry, Physical
R. de Miguel, J. M. Rubi
Summary: This communication clarifies that while Gibbs's classical thermodynamic framework may need modifications for very small systems, it is fundamentally valid for describing the thermodynamic properties of surfaces. Classical surface laws are applicable at the nanoscale, as suggested by simulations and confirmed by experiments. Furthermore, a generalized Gibbs-Tolman-Koenig-Buff equation and Tolman's law for surface tension can be obtained through a classical thermodynamic analysis in the Tolman region.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Alberto Rolandi, Marti Perarnau-Llobet, Harry J. D. Miller
Summary: To achieve efficient and reliable control of microscopic systems, it is important to find driving protocols that minimize both average dissipation and stochastic fluctuations in work. In rapidly driven classical and quantum systems, we have characterized these optimal protocols, showing that they involve two discontinuous jumps in the full set of control variables. These jumps can be adjusted to interpolate between processes with minimal dissipation or minimal fluctuations, and sometimes allow for simultaneous minimization. We have demonstrated our general results using rapidly driven closed quantum systems, classical bit erasure, and a dissipative Ising chain driven close to a quantum phase transition.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jonas Meinel, Minsik Kwon, Rouven Maier, Durga Dasari, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Vadim Vorobyov, Joerg Wrachtrup
Summary: In this study, a new method for detecting nuclear magnetic resonance (NMR) signals at high magnetic fields using heterodyne detection is introduced. By utilizing a series of phase coherent electron nuclear double resonance sensing blocks, the limitations of heterodyne detection at high magnetic fields are overcome, allowing for chemical shift resolution in NMR experiments.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Ana Laura Gramajo, Elisabetta Paladino, Jukka Pekola, Rosario Fazio
Summary: Using a stochastic approach, we investigate the impact of system coherences on the fluctuation behavior of a thermal machine. Heat exchange with the cold bath leads to increased system instabilities, while coupling with the hot bath improves cycle precision and reduces thermodynamic fluctuations below the classical bound. Coherence suppression not only restores cycle cooling but also enhances the convergence of fluctuation relations by increasing entropy production. Our findings shed light on thermodynamic relations at the stochastic level, despite the simplicity of our model.
Article
Optics
Yuqiang Ding, Feng Ding, Xueyuan Hu
Summary: The study confirmed that there are different laws of state conversions between thermal operations and enhanced thermal operations, and that a state transition induced by the latter cannot be approximately realized by the former. This contributes to the research on restrictions on coherence dynamics in quantum thermodynamics.
Article
Physics, Multidisciplinary
Kenza Hammam, Heather Leitch, Yassine Hassouni, Gabriele De Chiara
Summary: This study investigates the impact of coherence on the thermodynamic tasks of a collision model. The results show that utilizing coherence as a resource in machine operation can lead to unconventional behavior and efficiencies beyond the Carnot limit.
NEW JOURNAL OF PHYSICS
(2022)
Article
Multidisciplinary Sciences
Tomas Opatrny, Simon Brauer, Abraham G. Kofman, Avijit Misra, Nilakantha Meher, Ofer Firstenberg, Eilon Poem, Gershon Kurizki
Summary: We propose heat machines that are nonlinear, coherent, and closed systems composed of few field modes. These machines can transform thermal-state input into nonthermal output with controlled quantum fluctuations, providing an output with reduced uncertainty that may be useful for sensing or communications in the quantum domain. They can be realized in optomechanical cavities or cold gases where interactions between photons or atoms are utilized.
Article
Physics, Fluids & Plasmas
Lars Knipschild, Andreas Engel, Jochen Gemmer
Summary: This study examines closed quantum systems, driven with negligible heating effects, to determine the conditions under which the Jarzynski relation holds for microcanonical or energy eigenstates. The validity of the Jarzynski relation depends on the exponential density of states, stiffness, and smoothness, indicating the independence of work probability density functions on energy levels and specific energy eigenstates. The validity of the Jarzynski relation for pure energy eigenstates is considered a unique quantum phenomenon absent in classical systems.
Review
Chemistry, Multidisciplinary
Koushik Debnath, Suman Pal, Nikhil R. Jana
Summary: Nanoparticles play a significant role in biomedical applications, where their ability to enter cells, target subcellular compartments, and control intracellular processes depends on appropriate design of size and surface chemistry. There have been great advancements in understanding the principles of cellular uptake of foreign materials, with size-dependent endocytotic uptake being a key factor in nanoparticle interaction with cells.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Tianqi Zhu, Jan Rhensius, Konstantin Herb, Viraj Damle, Gabriel Puebla-Hellmann, Christian L. Degen, Erika Janitz
Summary: The research team addressed the poor signal-to-noise ratio (SNR) issue of optical spin-readout techniques by coupling individual NV centers to optimized diamond nanopillars, leading to improved collection efficiency of fluorescence. The optimized devices showed increased SNR and were compatible with low-numerical-aperture collection optics and a reduced tip radius, reducing experimental overhead and improving spatial resolution for scanning applications.
Article
Mathematics, Interdisciplinary Applications
Stefano Gherardini, Lorenzo Buffoni, Guido Giachetti, Andrea Trombettoni, Stefano Ruffo
Summary: This paper discusses the statistical description of energy fluctuations in non-equilibrium regimes generated by the interaction between a quantum system and a measurement apparatus. The exchanged heat probability density function and characteristic function are derived and interpreted to quantify the information about energy fluctuations. The validity conditions of the fluctuation theorem and the late-time properties of the heat characteristic function are also analyzed. The paper further explores the changes in energy fluctuation relations when the system operates in the quantum Zeno regime, and illustrates the theoretical results with two-and three-levels quantum systems.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Physics, Multidisciplinary
Akram Touil, Baris Cakmak, Sebastian Deffner
Summary: This study investigates the potential of utilizing quantum entanglement to extract thermodynamic work by analyzing bipartite quantum systems with locally thermal states. The results demonstrate that the quantum mutual information contributes to the extractable work, providing insights into the thermodynamic value of quantum correlations.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Optics
A. Hovhannisyan, V Stepanyan, A. E. Allahverdyan
Summary: Linear optics imposes a more general relation than the second law of thermodynamics. For optical modes undergoing linear evolution, the photon number does not decrease if the evolution starts from a generalized diagonal state. This relation also holds for a wide range of initial states and leads to an increase in the Bose entropy of the modes. Nonlinear interactions between the modes can reverse the heating process and achieve cooling, decreasing the photon number and related noise in an equilibrium system of modes with different frequencies.
Article
Physics, Multidisciplinary
Marek Mozrzymas, Michal Studzinski, Michal Horodecki
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2018)
Article
Physics, Multidisciplinary
Robert Alicki, Michal Horodecki
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2019)
Article
Physics, Multidisciplinary
Monika Rosicka, Pawel Mazurek, Andrzej Grudka, Michal Horodecki
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2020)
Article
Quantum Science & Technology
Carlo Sparaciari, Lidia del Rio, Carlo Maria Scandolo, Philippe Faist, Jonathan Oppenheim
Article
Quantum Science & Technology
Ravishankar Ramanathan, Monika Rosicka, Karol Horodecki, Stefano Pironio, Michal Horodecki, Pawel Horodecki
Article
Quantum Science & Technology
Marcin Lobejko, Pawel Mazurek, Michal Horodecki
Article
Quantum Science & Technology
Patryk Lipka-Bartosik, Pawel Mazurek, Michal Horodecki
Summary: This work discusses the consequences of introducing the ground state of the battery and breaking its translational symmetry in stochastic thermodynamics, leading to a family of inequalities replacing the Jarzynski identity and corrections to the second law of thermodynamics that exponentially vanish with distance. Additionally, it explores the implications of explicitly introducing the ground state of the battery in thermal operations, showing that the occupation of the vacuum state of a physical battery sets a lower bound on fluctuations of work.
Article
Physics, Particles & Fields
Jonathan Oppenheim, Zachary Weller-Davies
Summary: The study investigates theories that involve classical treatment of space-time interacting with quantum fields, overcoming various no-go theorems and pathologies by being linear in density matrix and phase-space density. These theories offer insights into the back-action of quantum fields on space-time metrics, with dynamics akin to general relativity in classical limit. By imposing invariance of dynamics under spatial diffeomorphisms, a methodology to derive constraint equations is provided, leading to generalizations of Hamiltonian and momentum constraints. The constraint algebra for a wide class of realizations of the theory, such as quantum scalar fields interacting with gravity, does not close without additional constraints, which may not reduce local degrees of freedom.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Quantum Science & Technology
Piotr Kopszak, Marek Mozrzymas, Michal Studzinski, Michal Horodecki
Summary: This study analyzes the problem of transmitting multiple unknown quantum states or a composite system in one go, deriving a lower bound on the process performance in terms of entanglement fidelity. The obtained bound is effectively computable and outperforms previous protocols, allowing for teleportation of a larger amount of quantum information. Closed-form expressions for entanglement fidelity and success probability in the qubit case are provided.
Article
Quantum Science & Technology
Jonathan Oppenheim, Carlo Sparaciari, Barbara Soda, Zachary Weller-Davies
Summary: This passage discusses the existence and application of a consistent dynamics that couples classical and quantum degrees of freedom. This dynamics is stochastic, linear, completely positive, and trace preserving. It introduces several toy models to study hybrid classical-quantum evolution and provides code for numerical simulation.
Article
Astronomy & Astrophysics
Jonathan Oppenheim
Summary: Despite the widely held belief that gravity should have a quantum nature, the conceptual challenges in constructing a quantum theory of gravity compel us to consider alternative perspectives. Unlike other forces, gravity defines the universal spacetime geometry and the bending of spacetime caused by matter gives rise to our perception of gravity. The flow of time and its causal structure may require a classical description for a well-formulated quantum theory. While arguments are presented to support this proposition, ultimately experimentation is necessary for further guidance.
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2023)
Article
Optics
Debashis Saha, Michal Oszmaniec, Lukasz Czekaj, Michal Horodecki, Ryszard Horodecki
Article
Optics
Pawel Mazurek, Mate Farkas, Andrzej Grudka, Michal Horodecki, Michal Studzinski
Article
Optics
L. Czekaj, M. Horodecki, T. Tylec
Article
Optics
Gilad Gour, Andrzej Grudka, Michal Horodecki, Waldemar Klobus, Justyna Lodyga, Varun Narasimhachar