Relativistic Quantum Information: developments in Quantum
... description of gravity: mass and energy move in a curved spacetime and the spacetime is curved by the presence of mass and energy. However, it is far from being complete. General relativity allows ill-defined objects such as singularities, and in the presence of a singularity it loses its predictive ...
... description of gravity: mass and energy move in a curved spacetime and the spacetime is curved by the presence of mass and energy. However, it is far from being complete. General relativity allows ill-defined objects such as singularities, and in the presence of a singularity it loses its predictive ...
Accretion Power in Astrophysics, Third Editiion
... theory are still recognizably the same. Of course our understanding is very incomplete. As the most glaring example, we still have essentially no idea what drives disc accretion; and there are new problems such as the dynamical stability of thick discs, or the nature of fieldline threading in magneti ...
... theory are still recognizably the same. Of course our understanding is very incomplete. As the most glaring example, we still have essentially no idea what drives disc accretion; and there are new problems such as the dynamical stability of thick discs, or the nature of fieldline threading in magneti ...
Magnetic polaron in (Cd,Mn)Te quantum dot inserted in ZnTe
... In this PhD work we study the optical properties of anisotropic (Cd,Mn)Te magnetic quantum dots inserted in ZnTe nanowires. The quantum dots containing typically 10% of Mn spins are elongated along the nanowire axis which tend to stabilize a light hole ground state with a spin susceptibility perpend ...
... In this PhD work we study the optical properties of anisotropic (Cd,Mn)Te magnetic quantum dots inserted in ZnTe nanowires. The quantum dots containing typically 10% of Mn spins are elongated along the nanowire axis which tend to stabilize a light hole ground state with a spin susceptibility perpend ...
Main_Article_revised_version
... anatase often shows a higher activity compared with rutile in most photocatalytic reactions remains a key challenge that will support strategies to enhance TiO2 photocatalysis. Nowadays, most studies of photocatalytic reactions are focused on particulate systems (as opposed to their dense thin film ...
... anatase often shows a higher activity compared with rutile in most photocatalytic reactions remains a key challenge that will support strategies to enhance TiO2 photocatalysis. Nowadays, most studies of photocatalytic reactions are focused on particulate systems (as opposed to their dense thin film ...
Ch a n d
... Harvard-Smithsonian Center for Astrophysics The nature of accretion onto supermassive black holes is still not well understood. X-ray telescopes currently in orbit are providing us with some answers and even more questions. I will discuss recent X-ray observations of several active galaxies, focusin ...
... Harvard-Smithsonian Center for Astrophysics The nature of accretion onto supermassive black holes is still not well understood. X-ray telescopes currently in orbit are providing us with some answers and even more questions. I will discuss recent X-ray observations of several active galaxies, focusin ...
A Numerical Approach to Virasoro Blocks and the Information
... are a signature of semiclassical black hole physics in AdS3 . They arise because thermal correlators exhibit a Euclidean-time periodicity under t → t + iβ, and so the OPE singularities have an infinite sequence of periodic images. The exact Virasoro blocks are not periodic, but in the semiclassical ...
... are a signature of semiclassical black hole physics in AdS3 . They arise because thermal correlators exhibit a Euclidean-time periodicity under t → t + iβ, and so the OPE singularities have an infinite sequence of periodic images. The exact Virasoro blocks are not periodic, but in the semiclassical ...
Wormhole Engineering in Orion`s Arm: An Overview
... Modern traversable wormholes can be divided into a number of regimes for descriptive purposes: discussion of the engineering rationale for these regions follows. Passage through a wormhole begins with docking at the transport station orbiting one of the mouths of the wormhole. The mouth is the regio ...
... Modern traversable wormholes can be divided into a number of regimes for descriptive purposes: discussion of the engineering rationale for these regions follows. Passage through a wormhole begins with docking at the transport station orbiting one of the mouths of the wormhole. The mouth is the regio ...
Jul y 10-12,
... bizarre, high-amplitude, highly-structured X-ray variability only seen before in the extremely energetic black hole system GRS 1915+105. In comparable states, IGR J17091-3624 X-ray flux can be between 30 and 50 times lower than that measured from GRS 1915+105, suggesting that either (i) all models r ...
... bizarre, high-amplitude, highly-structured X-ray variability only seen before in the extremely energetic black hole system GRS 1915+105. In comparable states, IGR J17091-3624 X-ray flux can be between 30 and 50 times lower than that measured from GRS 1915+105, suggesting that either (i) all models r ...
Recent developments in gravitational collapse and spacetime
... galactic material, they then evolve and shine for millions of years, and eventually enter the phase of dissolution and extinction. Stars shine by burning their nuclear fuel within, which is mainly hydrogen, fusing it into helium and later into other heavier elements. Eventually, when all matter is c ...
... galactic material, they then evolve and shine for millions of years, and eventually enter the phase of dissolution and extinction. Stars shine by burning their nuclear fuel within, which is mainly hydrogen, fusing it into helium and later into other heavier elements. Eventually, when all matter is c ...
An Improved Distance and Mass Estimate for Sgr A* from a Multistar
... (Eckart & Genzel 1997; Ghez et al. 1998; Ghez et al. 2000; Eckart et al. 2002). With further observations, these stellar motions have provided strong evidence for the presence of a supermassive black hole (SMBH) at the Galactic Center (Sgr A*) with a mass of about 4 × 106 M . Once the star S0-2 wen ...
... (Eckart & Genzel 1997; Ghez et al. 1998; Ghez et al. 2000; Eckart et al. 2002). With further observations, these stellar motions have provided strong evidence for the presence of a supermassive black hole (SMBH) at the Galactic Center (Sgr A*) with a mass of about 4 × 106 M . Once the star S0-2 wen ...
Slide 1
... When most of the hydrogen is used up, the core gets crushed Eventually the atoms get REALLY close to each other and the strength of the repulsion between the electrons from quantum mechanics is so big that it balances out the gravity Outer part becomes a Red Giant and then diffuses into space – Inne ...
... When most of the hydrogen is used up, the core gets crushed Eventually the atoms get REALLY close to each other and the strength of the repulsion between the electrons from quantum mechanics is so big that it balances out the gravity Outer part becomes a Red Giant and then diffuses into space – Inne ...
c Copyright by Jonathan C. McKinney, 2004
... nuclei (AGN) are likely powered by accretion onto a rotating black hole. I model the global, timedependent accretion flow around a black hole using the nonradiative viscous hydrodynamic (VHD), Newtonian magnetohydrodynamic (MHD), and general relativistic MHD (GRMHD) equations of motion, which are in ...
... nuclei (AGN) are likely powered by accretion onto a rotating black hole. I model the global, timedependent accretion flow around a black hole using the nonradiative viscous hydrodynamic (VHD), Newtonian magnetohydrodynamic (MHD), and general relativistic MHD (GRMHD) equations of motion, which are in ...
Abstract Title of Dissertation: BLACK HOLE DYNAMICS AND GRAVITATIONAL RADIATION IN GALACTIC NUCLEI
... tens of events per year will be detectable with Advanced LIGO. Larger galaxies that host supermassive black holes can produce extreme-mass ratio inspiral (EMRI) events, which are important sources for the future space-based detector, LISA. Here, we show that tidal separation of black hole binaries b ...
... tens of events per year will be detectable with Advanced LIGO. Larger galaxies that host supermassive black holes can produce extreme-mass ratio inspiral (EMRI) events, which are important sources for the future space-based detector, LISA. Here, we show that tidal separation of black hole binaries b ...
The General Relativistic Two Body Problem and the Effective One
... and the coalescence of binary neutron stars. Much physics remains to be explored in these systems, especially during and after the merger of the neutron stars (which involves a much more complex physics than the pure-gravity merger of two black holes). Recently, a new source of information on the ge ...
... and the coalescence of binary neutron stars. Much physics remains to be explored in these systems, especially during and after the merger of the neutron stars (which involves a much more complex physics than the pure-gravity merger of two black holes). Recently, a new source of information on the ge ...
LIGO SURF 2006 Lecture 1 - Indico
... deviation grows quadratically with time Merger in about 300M years (<< age of universe!) shortening of period orbital energy loss ...
... deviation grows quadratically with time Merger in about 300M years (<< age of universe!) shortening of period orbital energy loss ...
LIGO I - Indico
... deviation grows quadratically with time Merger in about 300M years (<< age of universe!) shortening of period orbital energy loss ...
... deviation grows quadratically with time Merger in about 300M years (<< age of universe!) shortening of period orbital energy loss ...
Hawking radiation
Hawking radiation is black body radiation that is predicted to be released by black holes, due to quantum effects near the event horizon. It is named after the physicist Stephen Hawking, who provided a theoretical argument for its existence in 1974, and sometimes also after Jacob Bekenstein, who predicted that black holes should have a finite, non-zero temperature and entropy.Hawking's work followed his visit to Moscow in 1973 where the Soviet scientists Yakov Zeldovich and Alexei Starobinsky showed him that, according to the quantum mechanical uncertainty principle, rotating black holes should create and emit particles. Hawking radiation reduces the mass and energy of black holes and is therefore also known as black hole evaporation. Because of this, black holes that lose more mass than they gain through other means are expected to shrink and ultimately vanish. Micro black holes are predicted to be larger net emitters of radiation than larger black holes and should shrink and dissipate faster.In September 2010, a signal that is closely related to black hole Hawking radiation (see analog gravity) was claimed to have been observed in a laboratory experiment involving optical light pulses. However, the results remain unverified and debatable. Other projects have been launched to look for this radiation within the framework of analog gravity. In June 2008, NASA launched the Fermi space telescope, which is searching for the terminal gamma-ray flashes expected from evaporating primordial black holes. In the event that speculative large extra dimension theories are correct, CERN's Large Hadron Collider may be able to create micro black holes and observe their evaporation.