Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Nigel R. Cooper"'
Autor:
Andrew A. Allocca, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033199 (2024)
The realization of excitonic insulators in transition metal dichalcogenide systems has opened the door to explorations of the exotic properties that such a state exhibits. We study theoretically the potential for excitonic insulators to show an anoma
Externí odkaz:
https://doaj.org/article/47bf91ea10d64bd4ba9e41540c5979ef
Publikováno v:
Physical Review Research, Vol 6, Iss 1, p L012039 (2024)
Entanglement between spatially distant qubits is perhaps the most counterintuitive and vital resource for distributed quantum computing. However, despite a few special cases, there is no known general procedure to maximally entangle two distant parts
Externí odkaz:
https://doaj.org/article/f19fba7d776e4f9b84736d66cd2f10fb
Publikováno v:
SciPost Physics, Vol 15, Iss 3, p 118 (2023)
We show that for a system of localized electrons in an impurity band, which form an Anderson insulating state at zero temperature, there can appear quantum oscillations of the magnetization, i.e. the Anderson insulator can exhibit the de Haas-van Alp
Externí odkaz:
https://doaj.org/article/89fd34880dd245f48431ef7086cc3871
Autor:
Paolo Molignini, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 5, Iss 2, p 023004 (2023)
The ground states of noninteracting fermions in one-dimension with chiral symmetry form a class of topological band insulators, described by a topological invariant that can be related to the Zak phase. Recently, a generalization of this quantity to
Externí odkaz:
https://doaj.org/article/bf379aaa437d4dd0b995cc8d4b894333
Autor:
Benjamin Remez, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p L022042 (2022)
We show that the “dark condensates” that arise when excitons form a Bose-Einstein condensate in a material with an indirect band gap are not completely dark to optical emission. Rather, such states are “leaky condensates” in which optical emi
Externí odkaz:
https://doaj.org/article/22caf909362840c6a61397ff1a5c5288
Autor:
Andrew A. Allocca, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p L042009 (2021)
Metals composed of weakly coupled, stacked layers possess a Fermi surface that slightly varies in size along the stacking direction. This appears in de Haas–van Alphen (dHvA) oscillations of the magnetization with a magnetic field as two close freq
Externí odkaz:
https://doaj.org/article/161ba7cbd7c64ad4b2d84aa90824e537
Autor:
Xiangliang Li, Davide Dreon, Philip Zupancic, Alexander Baumgärtner, Andrea Morales, Wei Zheng, Nigel R. Cooper, Tobias Donner, Tilman Esslinger
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p L012024 (2021)
We observe a structural phase transition between two configurations of a superradiant crystal by coupling a Bose-Einstein condensate to an optical cavity and applying imbalanced transverse pump fields. The transition can be interpreted as a transitio
Externí odkaz:
https://doaj.org/article/defec6a12f3a472a938d1c6a0d0dac5c
Autor:
Shovan Dutta, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p L012016 (2021)
We find a rich variety of counterintuitive features in the steady states of a qubit array coupled to a dissipative source and sink at two arbitrary sites, using a master equation approach. We show there are setups where increasing the pump and loss r
Externí odkaz:
https://doaj.org/article/e24c2443a1474f5e9df756f9e1fd9fc2
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023120 (2022)
The geometric interpretation of (pseudo)spin-1/2 systems on the Bloch sphere has been appreciated across different areas ranging from condensed matter to quantum information and high-energy physics. Although similar notions for larger Hilbert spaces
Externí odkaz:
https://doaj.org/article/8f47ad90a0b44a28801c39177d67fd22
Autor:
Stephen Spurrier, Nigel R. Cooper
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033071 (2020)
We establish an analytic low-energy theory describing higher-order topological insulator (HOTI) phases in quasicrystalline systems. We apply this to a model consisting of two stacked Haldane models with oppositely propagating edge modes, analogous to
Externí odkaz:
https://doaj.org/article/a3e11b424dd74847b0fe3b9bb699fd7f