Zobrazeno 1 - 10
of 1 108
pro vyhledávání: '"macroscopic superpositions"'
Publikováno v:
Phys. Rev. A 108, 053327 (2023)
We analyse the conditional states in which one part of a split spin-squeezed state is left, upon performing a collective spin measurement on the other part. For appropriate measurement directions and outcomes, we see the possibility of obtaining stat
Externí odkaz:
http://arxiv.org/abs/2310.12933
Publikováno v:
Physical Review A 105, 012824 (2022)
Levitated nanodiamonds containing negatively charged nitrogen-vacancy centers (${\text{NV}}^{-}$) have been proposed as a platform to generate macroscopic spatial superpositions. Requirements for this include having a long ${\text{NV}}^{-}$ spin cohe
Externí odkaz:
http://arxiv.org/abs/2105.02105
When is decoherence "effectively irreversible"? Here we examine this central question of quantum foundations using the tools of quantum computational complexity. We prove that, if one had a quantum circuit to determine if a system was in an equal sup
Externí odkaz:
http://arxiv.org/abs/2009.07450
Autor:
Filatov, Stanislav1 (AUTHOR) sutasu@tutanota.com, Auzinsh, Marcis1 (AUTHOR)
Publikováno v:
Entropy. Nov2022, Vol. 24 Issue 11, p1546. 6p.
Autor:
Nolan, Samuel P., Haine, Simon A.
Publikováno v:
Phys. Rev. A 98, 063606 (2018)
We theoretically investigate the effect of multi-mode dynamics on the creation of macroscopic superposition states (spin-cat states) in Bose-Einstein condensates via one-axis twisting. A two-component Bose-Einstein condensate naturally realises an ef
Externí odkaz:
http://arxiv.org/abs/1810.03236
Publikováno v:
Quantum 1, 34 (2017)
We consider fundamental limits on the detectable size of macroscopic quantum superpositions. We argue that a full quantum mechanical treatment of system plus measurement device is required, and that a (classical) reference frame for phase or directio
Externí odkaz:
http://arxiv.org/abs/1705.07053
Autor:
Park, Chae-Yeun, Jeong, Hyunseok
Schr\"odinger's illustration of an imaginary cat in a box, neither alive nor dead, leads to a question of whether and how long a macroscopic quantum superposition can exist in various situations. It is well known that a macroscopic superposition is d
Externí odkaz:
http://arxiv.org/abs/1606.07213
Autor:
Dakić, Borivoje, Radonjić, Milan
Publikováno v:
Phys. Rev. Lett. 119, 090401 (2017)
We study the question of what kind of a macroscopic superposition can(not) naturally exist as a ground state of some gapped local many-body Hamiltonian. We derive an upper bound on the energy gap of an arbitrary physical Hamiltonian provided that its
Externí odkaz:
http://arxiv.org/abs/1606.07712
Autor:
Abad, Tahereh, Karimipour, Vahid
Publikováno v:
Phys. Rev. B 93, 195127 (2016)
It is well known that in a quantum phase transition (QPT), entanglement remains short ranged [Osterloh et al., Nature 416 608-610 (2005)]. We ask if there is a quantum property entailing the whole system which diverges near this point. Using the rece
Externí odkaz:
http://arxiv.org/abs/1512.08087
We utilise a magneto-mechanical levitated massive resonator in the quantum regime to prepare highly macroscopic quantum superposition states. Using these macroscopic superpositions we present a novel interferometry protocol to perform absolute gravim
Externí odkaz:
http://arxiv.org/abs/1412.6864