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90 papers · 1 filter
Accelerating Black Holes
Ruth Gregory
In this presentation, I review recent work with Mike Appels and David Kubiznak on thermodynamics of accelerating black holes. I start by reviewing the geometry of accelerating blac…
The Engineering of a Scalable Multi-Site Communications System Utilizing Quantum Key Distribution (QKD)
Piotr K. Tysowski, Xinhua Ling, Norbert Lütkenhaus +1
Quantum Key Distribution (QKD) is a means of generating keys between a pair of computing hosts that is theoretically secure against cryptanalysis, even by a quantum computer. Altho…
Large magnetic field variations towards the Galactic Centre magnetar, PSR J1745-2900
Gregory Desvignes, Ralph Eatough, Ue-Li Pen +13
Polarised radio emission from PSR J1745-2900 has already been used to investigate the strength of the magnetic field in the Galactic Centre, close to Sagittarius A*. Here we report…
Chandra Imaging of the Outer Accretion Flow onto the Black Hole at the Center of the Perseus Cluster
J. M. Miller, M. W. Bautz, B. R. McNamara
Nowhere is black hole feedback seen in sharper relief than in the Perseus cluster of galaxies. Owing to a combination of astrophysical and instrumental challenges, however, it can…
Quasinormal modes and Strong Cosmic Censorship
Vitor Cardoso, Joao L. Costa, Kyriakos Destounis +2
The fate of Cauchy horizons, such as those found inside charged black holes, is intrinsically connected to the decay of small perturbations exterior to the event horizon. As such,…
Bounds on the dynamics of periodic quantum walks and emergence of the gapless and gapped Dirac equation
N. Pradeep Kumar, Radhakrishna Balu, Raymond Laflamme +1
We study the dynamics of discrete-time quantum walk using quantum coin operations, and in time-dependent periodic sequence. For the two-period quantum…