Quantum mechanics and gravitation are two pillars of modern physics. Despite their success in describing the physical world around us, they seem to be incompatible theories. There are suggestions that one of these theories must be generalized to achieve unification. For example, Born's rule--one of the axioms of quantum mechanics--could be violated. Born's rule predicts that quantum interferenc...

Chiral bosons are important building blocks in the study of supergravity, string theory and quantum Hall effect. Along the last two decades many different formulations have appeared trying to describe the dynamics and the quantization of these curious objects. However two of them have gain special attention among people working on this area: the gauge invariant formulation proposed by Siegel an...

The question of what magnetism is vital to quantum physics. We know all other phenomenon is, but we did not is. It enough say it a force because charge. That must be something, for consistencies sake had tested. This paper was written in order confirm the results that were received experiments took place led “Magnetism: Insights from Thomas Young Experiment” where concluded magnetic both partic...

The advent of quantum computing has challenged classical conceptions of which problems are efficiently solvable in our physical world. Thismotivates the general study of howphysical principles bound computational power. In this paper we show that some of the essentialmachinery of quantum computation—namely reversible controlled transformations and the phase kick-backmechanism— exist in any oper...

Q uantum interference effects lie at the heart of technologies that promise radically new capabilities for sensors, secure communications, and computing. Most existing experiments and applications rely on one photon interfering with itself, or two photons interfering with each other. However, the interference of a larger number of particles leads to a richer variety of phenomena, and may enable...

Quantum dots play an important role in nanoscaled electronic devices. In order to fully understand the transport properties of quantum dots, phenomena such as tunneling of electrons must be characterized. Phase measurements of an electron traversing a quantum dot via a double-slit interference experiment were carried out by Heiblum and co-workers. In their experiment, the quantum dot ~QD! was i...

We discuss quantum interference effects in a three-level atom in Λ-configuration, where both transitions from the upper state to the lower states are driven by a single monochromatic laser field. Although the system has two lower states, quantum interference is possible because there are interfering pathways to each of the two lower states. The additional interference terms allow for interestin...

We show that in a magnetic nanowire with double magnetic domain walls, quantum interference results in spin-split quasistationary states localized mainly between the domain walls. Spin-flip-assisted transmission through the domain structure increases strongly when these size-quantized states are tuned on resonance with the Fermi energy, e.g., upon varying the distance between the domain walls w...

The application of single molecules as templates for nanodevices is a promising direction for nanotechnology. We used a pair of suspended DNA molecules as templates for superconducting two-nanowire devices. Because the resulting wires are very thin, comparable to the DNA molecules themselves, they are susceptible to thermal fluctuations typical for one-dimensional superconductors and exhibit a ...