Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Kominis I"'
Autor:
Kominis, I. K., Gkoudinakis, E.
A large number of magnetic sensors, like superconducting quantum interference devices, optical pumping and nitrogen vacancy magnetometers, were shown to satisfy the energy resolution limit. This limit states that the magnetic sensitivity of the senso
Externí odkaz:
http://arxiv.org/abs/2410.07186
Autor:
Kominis, I. K.
It was recently demonstrated that a multitude of realizations of several magnetic sensing technologies satisfy the energy resolution limit, which connects a quantity composed by the variance of the magnetic field estimate, the sensor volume and the m
Externí odkaz:
http://arxiv.org/abs/2405.14687
Present protocols for obtaining the ultimate magnetic sensitivity of optically pumped magnetometers (OPMs) utilizing alkali-metal ensembles rely on uncorrelated atoms in stretched states. A new approach for calculating the spin projection noise (SPN)
Externí odkaz:
http://arxiv.org/abs/2402.10746
Autor:
Mouloudakis, K., Vouzinas, F., Margaritakis, A., Koutsimpela, A., Mouloudakis, G., Koutrouli, V., Skotiniotis, M., Tsironis, G. P., Loulakis, M., Mitchell, M. W., Vasilakis, G., Kominis, I. K.
We report an experimental and theoretical study of spin noise correlations in a $^{87}$Rb-$^{133}$Cs unpolarized alkali-metal vapor dominated by spin-exchange collisions. We observe strong unequal-time inter-species correlations and account for these
Externí odkaz:
http://arxiv.org/abs/2308.13090
Publikováno v:
Journal of Applied Physics 134, 164701 (2023)
We present a falling-sphere viscometer with a magnetized sphere and fluxgate magnetometers continuously measuring the magnetic field produced at the sensor positions by the falling sphere. With a fluid volume of 15 ml and within a few seconds, we dir
Externí odkaz:
http://arxiv.org/abs/2306.08725
Autor:
Kominis, I. K.
Publikováno v:
Advanced Quantum Technologies, 2300292 (2023)
A fundamental concept of quantum physics, the Wigner Yanase information, is here used as a measure of quantum coherence in spin-dependent radical-pair reactions pertaining to biological magnetic sensing. This measure is connected to the uncertainty o
Externí odkaz:
http://arxiv.org/abs/2301.11023
Publikováno v:
Phys. Rev. A 106, 023112 (2022)
We present a first-principles analysis of the noise spectra of alkali-metal-metal vapors in and out of the spin-exchange-relaxation-free (SERF) regime, and we predict non-intuitive features with a potential to further improve the sensitivity of SERF
Externí odkaz:
http://arxiv.org/abs/2204.08748
Autor:
Kominis, I. K., Loulakis, Michail
Publikováno v:
Journal of Applied Physics 131, 084401 (2022)
It was recently proposed to use the human visual system's ability to perform efficient photon counting in order to devise a new biometric methodology. The relevant biometric fingerprint is represented by the optical losses light suffers along several
Externí odkaz:
http://arxiv.org/abs/2112.03211
Autor:
Mouloudakis, K., Kominis, I. K.
Publikováno v:
Phys. Rev. A 103, 010401 (2021)
Spin-exchange collisions in alkali or alkali/noble gas vapors are at the basis of quantum sensing, nucleon structure studies, tests of fundamental symmetries, and medical imaging. We here show that spin-exchange collisions in hot alkali vapors natura
Externí odkaz:
http://arxiv.org/abs/2004.11790
Autor:
Kominis, I. K.
Publikováno v:
Phys. Rev. Research 2, 023206 (2020)
Radical-pair reactions pertinent to biological magnetic field sensing are an ideal system for demonstrating the paradigm of quantum biology, the exploration of quantum coherene effects in complex biological systems. We here provide yet another fundam
Externí odkaz:
http://arxiv.org/abs/2001.09319