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A long-standing problem of observing Room Temperature Superconductivity is finally solved by a novel approach. Instead of increasing the critical temperature Tc of a superconductor, the temperature of the room was decreased to an…

Superconductivity · Physics 2020-04-02 Ivan Timokhin , Artem Mishchenko

We present a scheme that utilizes an ion confined within a bi-dimensional trap to simulate a quantum Otto heat engine whose working substance is a two-level system. In this scheme, the electronic component of the ion (the two-level system)…

One limit to the fidelity of quantum logic operations on trapped ions arises from heating of the ions' collective modes of motion. Sympathetic cooling of the ions during the logic operations may eliminate this source of errors. We discuss…

The paper describes a method for measuring the thermal diffusivity of materials having a high thermal conductivity. The apparatus is rather simple and low-cost, being therefore suitable in a laboratory for undergraduate students of…

Physics Education · Physics 2014-01-15 Amelia Carolina Sparavigna

Results are presented from a small-scale experiment to investigate the use of room temperature organic liquid scintillators as the active medium for a time projection chamber (TPC). The optical properties of liquid scintillators have long…

Instrumentation and Detectors · Physics 2015-06-05 N. McConkey , Y. A. Ramachers

Experiments on the distributions of switching currents in Josephson junctions are sensitive probes of the mechanism by which a junction changes abruptly to a finite voltage state. At low temperatures data exhibit smooth and gradual…

Superconductivity · Physics 2021-08-19 James A. Blackburn

We use computational simulations to study the electron emission and propagation in planar vacuum diodes. We show how space-charge affects thermionic emission from cathodes with two different values of work function that form a checkerboard…

Computational Physics · Physics 2021-01-25 Anna Sitek , Kristinn Torfason , Andrei Manolescu , Agust Valfells

We report the results of a computer simulation study of the thermodynamic properties and the thermal conductivity of supercooled water as a function of pressure and temperature using the TIP4P-2005 water model. The thermodynamic properties…

Statistical Mechanics · Physics 2015-06-19 F. Bresme , J. W. Biddle , J. V. Sengers , M. A. Anisimov

In this paper we propose new boundary conditions at the hot walls with thermionic electron emission for two-temperature thermal arc models. In the derived boundary conditions the walls are assumed to be made from refractory metals and that…

Plasma Physics · Physics 2015-09-30 Leonid Pekker , Nakhlek Hussary

We propose and demonstrate an experimental scheme to engineer thermal baths with independently tunable temperatures and dissipation rates for the motional modes of a trapped-ion system. This approach enables robust thermal-state preparation…

We provide the theoretical basis of calorimetry for a class of active particles subject to thermal noise. Simulating AC-calorimetry, we numerically evaluate the heat capacity of run-and-tumble particles in double-well and in periodic…

Statistical Mechanics · Physics 2023-05-24 Pritha Dolai , Christian Maes , Karel Netočný

We present measurements of the motional heating rate of a trapped ion at different trap frequencies and temperatures between $\sim$0.6 and 1.5 MHz and $\sim$4 and 295 K. Additionally, we examine the possible effect of adsorbed surface…

Atomic Physics · Physics 2015-06-23 C. D. Bruzewicz , J. M. Sage , J. Chiaverini

The energy dependent thermoelectric response of a single molecule contains valuable information about its transmission function and its excited states. However, measuring it requires devices that can efficiently heat up one side of the…

In passive sky-facing radiative cooling, wavelength-selective thermal emitters in the atmospheric transparency window of 8-13 $\mu$m can reach lower temperatures compared to broadband emitters, but broadband emitters always have higher…

Optics · Physics 2025-06-16 Yeonghoon Jin , Jin-Woo Cho , Mikhail A. Kats

The floating potential of a probe, emitting a sufficiently high electron current, yields a fairly accurate approximation of the plasma potential. This is an advantage in comparison to the conventional Langmuir probe where, after…

Plasma Physics · Physics 2007-05-23 Ramin Madani , Codrina Ionita , Roman Schrittwieser , Thomas Klinger

The energy of ionic thermal motion presents universally, which is as high as 4 kJ\bullet kg-1\bullet K-1 in aqueous solution, where thermal velocity of ions is in the order of hundreds of meters per second at room temperature1,2. Moreover,…

Mesoscale and Nanoscale Physics · Physics 2012-03-13 Zihan Xu , Guoan Tai , Yungang Zhou , Fei Gao , Kin Hung Wong

We present in this paper the comparison of methods to measure parameters to characterize a large SiPM of area of about 1 cm$^2$. We also explain the challenges of operating it with continuous light and at room temperature. We present a…

Instrumentation and Detectors · Physics 2020-10-28 T. Montaruli , A. Nagai

At the ultra-thin limit below 20 nm, a film's electrical conductivity, thermal conductivity, or thermoelectricity depends heavily on its thickness. In most studies, each sample is fabricated one at a time, potentially leading to…

Mesoscale and Nanoscale Physics · Physics 2023-06-22 Kien Trung Nguyen , Giang Bui-Thanh , Hong Thi Pham , Thuat Nguyen-Tran , Chi Hieu Hoang , Hung Q. Nguyen

The surface of an insulating material irradiated by a beam of low energy electrons charges positively if the yield of secondary electron is greater than unity. For such a dynamical equilibrium, the thermodynamic properties have been…

Materials Science · Physics 2009-11-11 F. Pesty , P. Garoche

Operando calorimetry has previously been utilized to study degradation, side reactions, and other electrochemical effects in electrochemical cells such as batteries at or near room temperature. Calorimetric data can provide important…