Zobrazeno 1 - 10
of 398
pro vyhledávání: '"Nissinen, J."'
Autor:
Nissinen, J., Volovik, G. E.
Relativistic gravitational anomalies lead to anomalous transport coefficients that can be activated at finite temperature in condensed matter systems with gapless fermions. The chiral vortical effect (CVE) is an anomalous chiral current along a rotat
Externí odkaz:
http://arxiv.org/abs/2111.08639
Publikováno v:
Phys. Rev. B 103, 245115 (2021)
We describe a three-dimensional crystalline topological insulator (TI) phase of matter that exhibits spontaneous polarization. This polarization results from the presence of (approximately) flat bands on the surface of such TIs. These flat bands are
Externí odkaz:
http://arxiv.org/abs/2008.02158
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
JETP Lett. 110, 789-792 (2019)
We discuss the possibility of a gravitional Nieh-Yan anomaly of the type $\partial_\mu j^\mu_5 =\gamma T^2{\cal T}^a\wedge {\cal T}_a$ in topological Weyl materials, where $T$ is temperature and ${\cal T}^a$ is the effective or emergent torsion. As d
Externí odkaz:
http://arxiv.org/abs/1911.03382
Autor:
Nissinen, J. (Jerry)
Vuonna 1984 Michael Berry havaitsi kvanttimekaanisten geometristen vaiheiden merkityksen kvanttimekaniikassa. Siksi niitä kutsutaan yleisesti Berryn vaiheiksi. Geometrinen vaihe syntyy, kun systeemin Hamiltonin operaattorin parametrit kehittyvät ad
Externí odkaz:
http://urn.fi/URN:NBN:fi:oulu-201806282599
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
Phys. Rev. Research 2, 033269 (2020)
We discuss the possibility of the torsional Nieh-Yan anomaly of the type $\mu (ej^\mu_5) =\gamma T^2({\cal T}^a \wedge {\cal T}_a)$ in Weyl superfluids, where $T$ is temperature and ${\cal T}^a$ is the effective or emergent torsion from the superflui
Externí odkaz:
http://arxiv.org/abs/1909.08936
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
Phys. Rev. Research 1, 023007 (2019)
For two-dimensional topological insulators, the integer and intrinsic (without external magnetic field) quantum Hall effect is described by the gauge anomalous (2+1)-dimensional [2+1d] Chern-Simons (CS) response for the background gauge potential of
Externí odkaz:
http://arxiv.org/abs/1812.03175
Autor:
Mäkinen, J. T., Dmitriev, V. V., Nissinen, J., Rysti, J., Volovik, G. E., Yudin, A. N., Zhang, K., Eltsov, V. B.
Publikováno v:
Nature Communications 10, Article number: 237 (2019)
Symmetries of the physical world have guided formulation of fundamental laws, including relativistic quantum field theory and understanding of possible states of matter. Topological defects (TDs) often control the universal behavior of macroscopic qu
Externí odkaz:
http://arxiv.org/abs/1807.04328
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
JETP 127, 948-957 (2018)
Theory of elasticity in topological insulators has many common features with relativistic quantum fields interacting with gravitational field in the tetrad form. Here we discuss several issues in the effective topological (pseudo)electromagnetic resp
Externí odkaz:
http://arxiv.org/abs/1803.09234
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
Phys. Rev. D 97, 025018 (2018)
Topologically protected superfluid phases of $^3$He allow one to simulate many important aspects of relativistic quantum field theories and quantum gravity in condensed matter. Here we discuss a topological Lifshitz transition of the effective quantu
Externí odkaz:
http://arxiv.org/abs/1710.07616
Autor:
Nissinen, J., Volovik, G. E.
Publikováno v:
JETP Lett. 106, 234--241 (2017)
We discuss the effective metric experienced by the Nambu-Goldstone mode propagating in the broken symmetry spin-superfluid state of coherent precession of magnetization. This collective mode represents the phonon in the RF driven or pulsed out-of-equ
Externí odkaz:
http://arxiv.org/abs/1707.00905