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220 papers · 1 filter
Highly-sensitive superconducting circuits at ~700 kHz with tunable quality factors for image-current detection of single trapped antiprotons
H. Nagahama, G. Schneider, A. Mooser +14
We developed highly-sensitive image-current detection systems based on superconducting toroidal coils and ultra-low noise amplifiers for non-destructive measurements of the axial f…
Efficient entanglement distillation without quantum memory
Daniela Abdelkhalek, Mareike Syllwasschy, Nicolas J. Cerf +2
Entanglement distribution between distant parties is an essential component to most quantum communication protocols. Unfortunately, decoherence effects such as phase noise in optic…
Efficient tomography of a quantum many-body system
B. P. Lanyon, C. Maier, M. Holzäpfel +10
Quantum state tomography (QST) is the gold standard technique for obtaining an estimate for the state of small quantum systems in the laboratory. Its application to systems with mo…
Validating gravitational-wave detections: The Advanced LIGO hardware injection system
C. Biwer, D. Barker, J. C. Batch +44
Hardware injections are simulated gravitational-wave signals added to the Laser Interferometer Gravitational-wave Observatory (LIGO). The detectors' test masses are physically disp…
Hidden symmetries of deformed oscillators
Sergey Krivonos, Olaf Lechtenfeld, Alexander Sorin
We associate with each simple Lie algebra a system of second-order differential equations invariant under a non-compact real form of the corresponding Lie group. In the limit of a…
Light shifts in atomic Bragg diffraction
Enno Giese, Alexander Friedrich, Sven Abend +2
Bragg diffraction of an atomic wave packet in a retroreflective geometry with two counterpropagating optical lattices exhibits a light shift induced phase. We show that the tempora…