# Professional Essays: QUANTUM entanglement thesis …

Prof. Cheng Chin, winner of a **Humboldt Research Award**, will join our group for his research sabbatical in the beginning of August 2014. Prof. Chin studies quantum many-body phenomena based on ultracold atoms and molecules at the University of Chicago, including phenomena from different branches of physics such as nuclear, condensed matter, gravitational and astro-physics. During his stay in Munich he will work in close cooperation with our group at LMU and MPQ, as well as the group of Prof. Wilhelm Zwerger at TUM.

## Carolina Thesis(1) | Quantum Entanglement - Scribd

### Thesis Vs Research Question - Quantum Entanglement Thesis

Over the summer, we investigated the classical theory of optical coherence via experimentally measuring the degree of second-order coherence. This experiment transitioned into my thesis in which we consider a variety of experiments that demonstrate the quantum behavior of light. In particular, we attempt to illustrate the phenomenon of entanglement, show the existence of the photon via determining the degree of second order coherence when treating light quantum mechanically, demonstrate single-photon and two-photon interference, test a form of Bell 's inequality, and primitively teleport the state of a particle over some distance. All of these experiments rely heavily on spontaneous parametric downconversion in which a single photon of one frequency splits into a pair of photons upon traversing a nonlinear crystal. Conservation of energy and momentum govern the properties of these photons that exit the crystal. In fact, these laws of conservation yield photons that exhibit entanglement, a property that we repeatedly exploit in our experiments.

### Tl Thesis | Quantum Entanglement | Quantum Mechanics

The idea of a computational device based on quantum mechanics wasexplored already in the 1970s by physicists and computerscientists. As early as 1969 Steven Wiesner suggested quantuminformation processing as a possible way to better accomplishcryptologic tasks. But the first four published papers on quantuminformation (Wiesner published his only in 1983), belong to AlexanderHolevo (1973), R.P. Poplavskii (1975), Roman Ingarden (1976) and YuriManin (1980). Better known are contributions made in the early 1980sby Charles H. Bennett of the IBM Thomas J. Watson Research Center,Paul A. Benioff of Argonne National Laboratory in Illinois, DavidDeutsch of the University of Oxford, and the late Richard P. Feynmanof the California Institute of Technology. The idea emerged whenscientists were investigating the fundamental physical limits ofcomputation. If technology continued to abide by “Moore’s Law” (theobservation made in 1965 by Gordon Moore, co-founder of Intel, thatthe number of transistors per square inch on integrated circuits haddoubled every 18 months since the integrated circuit was invented),then the continually shrinking size of circuitry packed onto siliconchips would eventually reach a point where individual elements wouldbe no larger than a few atoms. But since the physical laws thatgovern the behavior and properties of the putative circuit at theatomic scale are inherently quantum mechanical in nature, notclassical, the natural question arose whether a new kind of computercould be devised based on the principles of quantum physics.