scholarly journals Quantum Fluctuations and New Instantons I: Linear Unbounded Potential

2020 ◽  
pp. 2000100
Author(s):  
V. F. Mukhanov ◽  
E. Rabinovici ◽  
A. S. Sorin
Keyword(s):  
Quantum Fluctuations ◽  
Unbounded Potential

scholarly journals Quantum Fluctuations and New Instantons II: Quartic Unbounded Potential

2020 ◽  
pp. 2000101
Author(s):  
V. F. Mukhanov ◽  
E. Rabinovici ◽  
A. S. Sorin
Keyword(s):  
Quantum Fluctuations ◽  
Unbounded Potential

Quantum fluctuations have been shown to affect macroscopic objects

Nature ◽  
2020 ◽  
Vol 583 (7814) ◽  
pp. 31-32
Author(s):  
Valeria Sequino ◽  
Mateusz Bawaj
Keyword(s):  
Quantum Fluctuations ◽  
Macroscopic Objects

Quantum fluctuations in magnetic nanostructures

2018 ◽  
Vol 189 (01) ◽  
pp. 85-94
Author(s):  
Yuri N. Barabanenkov ◽  
Sergej A. Nikitov ◽  
Mikhail Yu. Barabanenkov
Keyword(s):  
Magnetic Nanostructures ◽  
Quantum Fluctuations

scholarly journals SMOOTHED QUANTUM FLUCTUATIONS AND CMB OBSERVATIONS

2012 ◽  
Vol 21 (10) ◽  
pp. 1250080
Author(s):  
JAKUB MIELCZAREK ◽  
MICHAŁ KAMIONKA
Keyword(s):  
Scalar Field ◽  
Power Spectrum ◽  
Internal Structure ◽  
Planck Scale ◽  
Quantum Fluctuations ◽  
Gaussian Smoothing ◽  
Cosmic Inflation ◽  
Smoothing Factor ◽  
High Multipoles

In this paper, we investigate power spectrum of a smoothed scalar field. The smoothing leads to regularization of the UV divergences and can be related with the internal structure of the considered field or the space itself. We perform Gaussian smoothing to the quantum fluctuations generated during the phase of cosmic inflation. We study whether this effect can be probed observationally and conclude that the modifications of the power spectrum due to the smoothing on the Planck scale are negligible and far beyond the observational abilities. Subsequently, we investigate whether smoothing in any other form can be probed observationally. We introduce phenomenological smoothing factor e-k2σ2 to the inflationary spectrum and investigate its effects on the spectrum of CMB anisotropies and polarization. We show that smoothing can lead to suppression of high multipoles in the spectrum of the CMB. Based on seven years observations of WMAP satellite we indicate that the present scale of high multipoles suppression is constrained by σ < 3.19 Mpc (95% CL). This corresponds to the constraint σ < 100 μm at the end of inflation. Despite this value is far above the Planck scale, other processes of smoothing can be possibly studied with this constraint, as decoherence or diffusion of primordial perturbations.

scholarly journals Short-time quantum detection: Probing quantum fluctuations

2012 ◽  
Vol 85 (4) ◽  
Author(s):  
Marco del Rey ◽  
Carlos Sabín ◽  
Juan León
Keyword(s):  
Quantum Fluctuations ◽  
Time Quantum ◽  
Quantum Detection ◽  
Short Time
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