How and in What Sense Can the Entropy Be Measured?
In this paper, a method of measuring the entropy is presented. Problems related to the entropy and the heat are also discussed.
physics.gen-ph↗
arXiv subjects
Bin Zhou
Publications and source records attributed to Bin Zhou.
Measuring the Entropy and Testing the Second Law of Thermodynamics
Evidence implies that basic laws of thermodynamics must be tested by experiments. In this paper, an experiment is designed to measure the entropy of a system with at least one known (measurable) equation of state, especially the gas systems. Since the entropy can be measured now, the formulae related to the second law of thermodynamics can be examined by other experiments.
physics.gen-ph↗
Quantum computing of molecular magnet Mn$_{12}$
Quantum computation in molecular magnets is studied by solving the time-dependent Schrödinger equation numerically. Following Leuenberger and Loss (Nature (London) 410, 789(2001)), an external oscillating magnetic field is applied to populate and manipulate the spin coherent states in molecular magnet Mn$_{12}$. The conditions to realize parallel recording and reading data bases of Grover algorithsm in molecular magnets are discussed in details. It is found that an accurate duration time of magnetic pulse as well as the amplitudes are required to design the device of quantum computing.
cond-mat.mes-hall↗
Global Structure of Certain Static Spacetimes (I)
In this paper, static spacetimes with a topological structure of R^2 \times N is studied, where N is an arbitrary manifold. Well known Schwarzschild spacetime and Reissner-Nordstrom spacetime are special cases. It is shown that the existence of a constant and positive surface gravity $κ$ ensures the existence of the Killing horizon, with the cross section homeomorphic to N.
gr-qc↗