Preprints

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2022-06-28
11:03
arXiv [PUBDB-2022-03193] Preprint
; ; ; et al
New Directions in Quantum Music: concepts for a quantum keyboard and the sound of the Ising model
[arXiv:2204.00399]
 GO
We explore ideas for generating sounds and eventually music by using quantum devices in the NISQ era using quantum circuits. In particular, we first consider a concept for a 'qeyboard', i.e. [...]
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2022-06-28
11:01
arXiv [PUBDB-2022-03191] Preprint
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Strategies for the Determination of the Running Coupling of $(2+1)$-dimensional QED with Quantum Computing
[arXiv:2206.12454]
 GO
We propose to utilize NISQ-era quantum devices to compute short distance quantities in $(2+1)$-dimensional QED and to combine them with large volume Monte Carlo simulations and perturbation theory. On the quantum computing side, we perform a calculation of the mass gap in the small and intermediate regime, demonstrating, in the latter case, that it can be resolved reliably. [...]
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2022-06-24
11:52
arXiv [PUBDB-2022-03182] Preprint
; ; ; et al
Self-broadening and self-shift in the $\mathbf{3\nu_{2}}$ band of ammonia from mid-infrared-frequency-comb spectroscopy
[arXiv:2205.04088]
 GO
We report the broadband absorption spectrum of the $3\nu_{2}$ band of $^{14}$NH$_{3}$ near 4 $\mu m$. The data was recorded using a mid-infrared frequency comb coupled to a homebuilt Fourier-transform spectrometer with a resolution of 0.00501 $cm^{-1}$. [...]
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2022-06-23
16:22
arXiv [PUBDB-2022-03175] Preprint

Measurement of the cross-section ratio $\sigma_{\psi(2S )}/\sigma_{J/\psi(1S )}$ in exclusive photoproduction at HERA
[DESY-22-107; arXiv:2206.13343]
 GO
The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and $\gamma p \to \psi(2S) p$ have been measured at an $ep$ centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb$^{-1}$. The measurement was made in the kinematic range $30 < W < 180$ GeV, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, where $W$ is the photon--proton centre-of-mass energy, $Q^2$ is the photon virtuality and $t$ is the squared four-momentum transfer at the proton vertex. [...]
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2022-06-17
13:08
OpenAccess [PUBDB-2022-02962] Preprint
; ; ; et al
Soliton Pulses in Photonic Crystal Fabry-Perot Microresonators
[arXiv:2206.10410]
Femtosecond dissipative Kerr solitons (DKS) in high-Q microresonators enable novel applications in spectroscopy, sensing, communication and signal processing. Usually, DKS pulses are generated in traveling-wave ring-resonators driven by continuous-wave lasers. [...]
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2022-06-17
11:11
OpenAccess [PUBDB-2022-02957] Preprint
; ; ; et al
Electronic Quantum Coherence in Glycine Molecules Probed with Ultrashort X-ray Pulses in Real Time
[arXiv:2012.04852]
Quantum coherence between electronic states of a photoionized molecule and the resulting process of ultrafast electron-hole migration have been put forward as a possible quantum mechanism of charge-directed reactivity governing the photoionization-induced molecular decomposition. Attosecond experiments based on the indirect (fragment ion-based) characterization of the proposed electronic phenomena suggest that the photoionization-induced electronic coherence can survive for tens of femtoseconds, while some theoretical studies predict much faster decay of the coherence due to the quantum uncertainty in the nuclear positions and the nuclear-motion effects. [...]
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2022-06-17
10:50
OpenAccess [PUBDB-2022-02955] Preprint
; ; ; et al
Temporal quality of post-compressed pulses at large compression factors
[arXiv:2201.05836]
Post-compression of ultra-short laser pulses via self-phase modulation is routinely employed for the generation of laser pulses with optical bandwidths reaching far beyond the laser gain limitations. While high compression factors can be routinely achieved, the compressed pulses typically suffer from temporal quality degradation. [...]
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2022-06-15
21:51
OpenAccess [PUBDB-2022-02943] Preprint
; ; ; et al
A new life for sterile neutrino dark matter after the pandemic
[CERN-TH-2022-099; DESY-22-102; ULB-TH/22-09; arXiv:2206.10630]
We propose a novel mechanism to generate sterile neutrinos $\nu_s$ in the early Universe, by converting ordinary neutrinos $\nu_\alpha$ in scattering processes $\nu_s\nu_\alpha\to\nu_s\nu_s$. After initial production by oscillations, this leads to an exponential growth in the $\nu_s$ abundance. [...]
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2022-06-14
23:45
OpenAccess [PUBDB-2022-02935] Preprint
; ;
Scalar Dark Matter Production from Preheating and Structure Formation Constraints
[DESY-22-104; arXiv:2206.08940]
We investigate the out-of-equilibrium production of scalar dark matter (DM) from the inflaton condensate during inflation and reheating. We assume that this scalar couples only to the inflaton via a direct quartic coupling and is minimally coupled to gravity. [...]
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2022-06-14
09:53
OpenAccess [PUBDB-2022-02929] Preprint
; ; ; et al
Neutrino Detection without Neutrino Detectors: Discovering Collider Neutrinos at FASER with Electronic Signals Only
[DESY-22-101; UCI-TR-2022-09; arXiv:2206.09932]
The detection of collider neutrinos will provide new insights about neutrino production, propagation, and interactions at TeV energies, the highest human-made energies ever observed. During Run 3 of the LHC, the FASER experiment is expected to detect roughly $10^4$ collider neutrinos using its emulsion-based neutrino detector FASER$\nu$. [...]
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