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23 papers · 1 filter
Finitely additive equivalent martingale measures
Patrizia Berti, Luca Pratelli, Pietro Rigo
Let be a linear space of real bounded random variables on the probability space . There is a finitely additive probability on , such that…
Sequential projective measurements for channel decoding
Seth Lloyd, Vittorio Giovannetti, Lorenzo Maccone
We study the transmission of classical information in quantum channels. We present a decoding procedure that is very simple but still achieves the channel capacity. It is used to g…
Local spinfoam expansion in loop quantum cosmology
Adam Henderson, Carlo Rovelli, Francesca Vidotto +1
The quantum dynamics of the flat Friedmann-Lemaitre-Robertson-Walker and Bianchi I models defined by loop quantum cosmology have recently been translated into a spinfoam-like forma…
Existence of solutions and separation from singularities for a class of fourth order degenerate parabolic equations
Giulio Schimperna, Sergey Zelik
A nonlinear parabolic equation of the fourth order is analyzed. The equation is characterized by a mobility coefficient that degenerates at 0. Existence of at least one weak soluti…
A characterization of the symmetric square of a curve
Margarida Mendes Lopes, Rita Pardini, Gian Pietro Pirola
In this paper a new intrinsic geometric characterization of the symmetric square of a curve and of the ordinary product of two curves is given. More precisely it is shown that the…
The quantum mechanics of time travel through post-selected teleportation
Seth Lloyd, Lorenzo Maccone, Raul Garcia-Patron +2
This paper discusses the quantum mechanics of closed timelike curves (CTC) and of other potential methods for time travel. We analyze a specific proposal for such quantum time trav…