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Entanglement loss in molecular quantum-dot qubits due to interaction with the environment
(IOP Publishing, 2018-05-16)
We study quantum entanglement loss due to environmental interaction in a condensed matter system with a complex geometry relevant to recent proposals for computing with single electrons at the nanoscale. We consider a ...
The Third Quantization: To Tunnel or Not to Tunnel?
(MDPI, 2018-03)
Within the framework of the third quantization, we consider the possibility that an initially recollapsing baby universe can enter a stage of near de Sitter inflation by tunnelling through a Euclidean wormhole that connects ...
Three-forms, dualities and membranes in four-dimensional supergravity
(Springer, 2018-07-04)
We consider four-dimensional N = 1 supergravity models of a kind appearing in string flux compactifications. It has been recently shown that, by using double three-form multiplets instead of ordinary chiral multiplets, one ...
What if gravity becomes really repulsive in the future?
(Springer, 2018-03-24)
The current acceleration of the Universe is one of themost puzzling issues in theoretical physics nowadays. We are far from giving an answer in this letter to the question of its nature. Yet, with the observations we have ...
Quantum entanglement in de Sitter space with a wall and the decoherence of bubble universes
(American Physical Society, 2018-04-30)
We study the effect of a bubble wall on the entanglement entropy of a free massive scalar field between two causally disconnected open charts in de Sitter space. We assume there is a delta-functional wall between the open ...
Spinor frame formalism for amplitudes and constrained superamplitudes of 10D SYM and 11D supergravity
(Springer, 2018-11-06)
We show that 10D spinor helicity formalism can be understood as spinor moving frame approach to supersymmetric particles extended to the description of amplitudes. This allows us to develop the spinor helicity formalism ...
Observation of Υ(2S)→γηb(1S) Decay
(American Physical Society, 2018-12-03)
We report the observation of gamma(2S) -> gamma eta(b)(1S) based on an analysis of the inclusive photon spectrum of 24.7 fb(-1) of e(+)e(-) collisions at the gamma(2s) center-of-mass energy collected with the Belle detector ...
High- fi delity non-adiabatic cutting and stitching of a spin chain via local control
(IOP Publishing, 2018-10-18)
We propose and analyze, focusing on non-adiabatic effects, a technique of manipulating quantum spin systems based on local 'cutting' and 'stitching' of the Heisenberg exchange coupling between the spins. This first operation ...
3-Form Cosmology: Phantom Behaviour, Singularities and Interactions
(MDPI, 2018-03-03)
The latest cosmological observations by the Planck collaboration (and combined with others) are compatible with a phantom-like behaviour (w <-1) for the dark energy equation of state that drives the current acceleration ...
Observation of an Excited Omega(-) Baryon
(American Physical Society, 2018-08-02)
Using data recorded with the Belle detector, we observe a new excited hyperon, an Omega*(-) candidate decaying into Xi K-0(-) and Xi K--(S)0 with a mass of 2012.4 +/- 0.7(stat) +/- 0.6(syst) McV/c(2) and a width of Gamma ...