Quantization is performed of a Friedmann-Robertson-Walker universe filled with a conformally invariant scalar field and a perfect fluid with equation of state p = αρ. A well-known discrete set of static quantum wormholes is shown to exist for radiation (α = 1/3), and a novel continuous set is found for cosmic strings (α = −1/3), the latter states having throat radii of any size. In both cases w...

A two dimensional array of Josephson junctions in a magnetic field is considered. It is shown that the dynamics of the vortices in the array resembles that of electrons on a two– dimensional lattice put in a magnetic field perpendicular to the lattice. Under appropriate conditions, this resemblance results in the formation of a quantum Hall fluid of vortices. The bosonic nature of vortices and ...

the rank-k numerical range has a close connection to the construction of quantum error correction code for a noisy quantum channel. for noisy quantum channel, a quantum error correcting code of dimension k exists if and only if the associated joint rank-k numerical range is non-empty. in this paper the notion of joint rank-k numerical range is generalized and some statements of [2011, generaliz...

quantum organizations are referred where stakeholders know how to access the infinite potential of the quantum field. viewing healthcare organizations from perspective of quantum theory suggest new approaches into management techniques for effective and efficient delivery of healthcare services. this research is aimed to determine the quantum skills, quantum leadership characteristics and funct...

The motion of a single vortex originates chaos in the quantum fluid defined in Bohm's interpretation of quantum mechanics. Here we analize this situation in a very simple case: one single vortex in a rectangular billiard.

Helium at low temperatures has unique quantum properties such as superfluidity, which causes it to behave differently from a classical fluid. Despite our deep understanding of quantum mechanics, there are many open questions concerning the properties of quantum fluids in nanoscale systems. Herein, the quantum behavior of helium transportation through one-dimensional nanopores was evaluated by m...

Keywords Abstract 20 years ago a new quantum state of matter was discovered and identified 1,2,3,4,5,6,7. The observed dynamic quantum state of spin precession in super-fluid 3 He-B bears the properties of spin current superfluidity, Bose condensation of spin waves – magnons, off-diagonal long-range order and related phenomena of quantum coherence.

Keywords Abstract 20 years ago a new quantum state of matter was discovered and identified 1,2,3,4,5,6,7. The observed dynamic quantum state of spin precession in super-fluid 3 He-B bears the properties of spin current superfluidity, Bose condensation of spin waves – magnons, off-diagonal long-range order and related phenomena of quantum coherence.

20 years ago a new quantum state of matter was discovered and identified 1,2,3,4,5,6,7. The observed dynamic quantum state of spin precession in super-fluid 3 He-B bears the properties of spin current superfluidity, Bose condensation of spin waves – magnons, off-diagonal long-range order and related phenomena of quantum coherence.