37 results about "Quantum phase transition" patented technology

Movement of a gel structure is propagated by successively applying external stimuli to cause volume phase transition in the gel structure by alternately causing the gel structure to collapse and swell to move the center of mass of the gel structure in the direction of successive stimuli application. The movement is mediated by confining structure for the gel and anchoring—the starting side of the gel in the swelling cycle.

The present invention generally relates to an adiabatic scanning calorimeter for simultaneous measurements of the temperature dependence of heat capacity and enthalpy of liquids and solids and phase transitions therein. Moreover, the invention allows for an accurate separation between pretransitional enthalpy variations and true latent heats at first-order or weakly first-order phase transitions. In addition, the invention relates to calorimeters for controlling temperature differences and heat fluxes in different modes of operation.

The invention provides a method for capturing and screening particle above a topological insulator substrate in a tunable manner through linearly-polarized planar optical wave, comprising the following steps: damaging the symmetric distribution of a Poynting vector around a particle, making the total Poynting vector on the particle not be zero, and producing a non-gradient optical force; and then, changing the direction and size of the total Poynting vector on the particle by changing the quantum state of a topological insulator substrate slab, further changing the direction and size of the non-gradient optical force applied by the total Poynting vector to the particle to adjust the motion trajectory of the particles in an incident light field, and then, capturing and screening nano-sized molecules attached to the surface of the particle in a tunable manner, wherein reversible quantum phase transition of the topological insulator substrate slab from topological non-mediocrity to topological mediocrity is realized by means of lighting, electrifying, heating, pressurizing, an additional magnetic field, and the like.

Various articles and devices can be manufactured to take advantage of a what is believed to be a novel thermodynamic cycle in which spontaneity is due to an intrinsic entropy equilibration. The novelthermodynamic cycle exploits the quantum phase transition between quantum thermalization and quantum localization. Preferred devices include a phonovoltaic cell, a rectifier and a conductor for use inan integrated circuit.

A process for electromagnetic (EM) energy-induced solid to liquid phase transitions in metals is disclosed. The method utilizes coherent EM fields to transform solid materials such as silicon and aluminum without significant detectable heat generation. The transformed material reverts to a solid form after the EM field is removed within a period of time dependent on the material and the irradiation conditions.

The invention relates to a cutting method for zirconia ceramic. The zirconia ceramic is prepared from zirconia or zirconia added with a stabilizer, wherein the crystal structure of the zirconia ceramic has a tetragonal phase and a monoclinic phase; a temperature of transition of the crystal structure of the zirconia ceramic from the tetragonal phase to the monoclinic phase is a phase-transition temperature; and the zirconia ceramic is cut by virtue of a cutter, and the temperature of a cutting area of the zirconia ceramic is controlled to be kept in a phase-transition temperature range during cutting. According to the cutting method disclosed by the invention, the characteristic that the zirconia ceramic is easy to generate phase transition from the tetragonal phase to the monoclinic phase in the phase-transition temperature range is greatly utilized, and the hardness of the monoclinic phase is low relative to the hardness of the tetragonal phase, thus a cutting difficulty can be reduced after the phase transition, and the cutter is longer in service life and higher in cutting efficiency.

The invention relates to the field of materials research and provides a method for researching the phase transition of a sample under high pressure. An apparatus for researching the phase transition of a sample at high pressure comprises a laser I, a beam splitter I, a mirror I, a mirror II, a sapphire anvil, the sample, a prism, a lens I, a laser II, a lens group for eliminating phase difference,an aperture, an objective lens, a beam splitter II, an optical filter, a camera, a chopper, a pinhole diaphragm, a lens II, an optical filter set and a detector. By means of a laser heating and optical image analysis method, the heating laser and the imaging laser are respectively incident on the sample by different optical paths, the heating efficiency of the sample and the collection efficiencyof reflected light can be optimized, and the method of combining an achromatic lens with the pinhole diaphragm is used to reduce the chromatic aberration in the optical paths, improve the resolutionof the thermal radiation spectrum measured by the detector, and improve the measurement accuracy of the sample temperature. The melting temperature of the sample can be determined more accurately by quantitatively analyzing the speckle interference pattern reflected from the sample surface by two methods.

A process for electromagnetic (EM) energy-induced solid to liquid phase transitions in metals is disclosed. The method utilizes coherent EM fields to transform solid materials such as silicon and aluminum without significant detectable heat generation. The transformed material reverts to a solid form after the EM field is removed within a period of time dependent on the material and the irradiation conditions.

The invention discloses a two-dimensional phase-change memory unit structure, comprising: a substrate wafer; a first insulating layer arranged above the substrate wafer, a lower electrode is arranged in the first insulating layer, and the The lower surface of the lower electrode is connected to the substrate wafer; the second insulating layer is arranged on the first insulating layer and the lower electrode; it is arranged in the second insulating layer and covers the lower electrode A phase-change structure on the surface, and the phase-change structure includes a first phase-change auxiliary layer, a phase-change material layer and a second phase-change auxiliary layer sequentially arranged above the lower electrode. The present invention also provides a method for preparing the structure. The obtained two-dimensional phase-change memory unit structure has an extremely thin phase-change material layer. When working, the phase-change material layer does not need to reach a molten state under the action of an electric field and a thermal field. The resistance value of itself can be changed by exchanging atoms with the phase-change auxiliary layer or undergoing a phase change by itself, so as to realize non-volatile storage with low energy consumption.

The invention relates to the technical field of high-entropy alloys and discloses a six-element high-entropy alloy with a first-order magnetic phase transition and a preparation method thereof. The six-element high-entropy alloy with the first-order magnetic phase transition has a general formula structure of MgaMnbFecCodNieGdf and is obtained by electrochemical reduction deposition, wherein an electrolyte in the electrochemical reduction deposition comprises the following components: dimethyl sulfoxide, tetraethylammonium hexafluorophosphate, vitamin C, GdCl3, FeCl2, CoCl2, NiCl2, MnCl2 and MgCl2. The prepared alloy is an amorphous alloy, the magnetic transition of the prepared alloy is the magnetic transition caused by strong electron correlation without being restrained by the crystal form transformation of a material, and therefore, the high-entropy alloy has the advantages of large temperature range of magnetic phase transition, controllable critical transition temperature and reversibility.

The invention discloses a path optimization method. The method is characterized in that the best and shortest path of large-scale destinations is calculated by a simulated annealing algorithm. According to the method and the system, the calculation time can be obviously shortened, and thus the method is relatively high in practicability and can be applied to cold atom dynamics and quantum phase transition calculation in an optical lattice, logistics distribution and other fields. The method can be applied to cold atom dynamics and quantum phase transition calculation in an optical lattice, logistics distribution and other fields, according to a three-level process algorithm, the calculation time can be obviously shortened, and thus the method is relatively high in practicability. In particular for calculation of large-scale destinations, the method is very short in calculation time and excellent in calculation effect, and thus the method is almost the unique feasible processing method.

The invention provides a ground cooling water prediction method based on a rainfall particle phase transition process, and the method comprises the following steps: 1, fundamental database construction; 2, numerical model calculation; 3, altitude comparison; 4, temperature stratification judgment; 5, grounding cooling water judgment; 6, grounding cooling water calculation; 7, wire icing thickness calculation. The beneficial effects of the invention are that 1, the method is clear, is high in operability, and fills a gap that there is currently no ground cooling water prediction based on the rainfall particle phase transition process; 2, the method is wide in application range, is good in portability, and can calculate the contents of ground cooling water of different regions and the wire icing thickness; 3, the ground cooling water obtained through calculation provides important reference basis for middle or short term data prediction in power grid icing.