Zobrazeno 1 - 10
of 377
pro vyhledávání: '"Jonathan Oppenheim"'
Publikováno v:
Quantum, Vol 8, p 1565 (2024)
We study the back-reaction of quantum systems onto classical ones. Taking the starting point that semi-classical physics should be described at all times by a point in classical phase space and a quantum state in Hilbert space, we consider an unravel
Externí odkaz:
https://doaj.org/article/d458600d9711467f8facbec630020d6e
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-24 (2023)
Abstract We consider two interacting systems when one is treated classically while the other system remains quantum. Consistent dynamics of this coupling has been shown to exist, and explored in the context of treating space-time classically. Here, w
Externí odkaz:
https://doaj.org/article/88e95a80bb63491d9e15a13dec360706
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 8, Pp 1-43 (2023)
Abstract Consistent coupling of quantum and classical degrees of freedom exists so long as there is both diffusion of the classical degrees of freedom and decoherence of the quantum system. In this paper, we derive the Newtonian limit of such classic
Externí odkaz:
https://doaj.org/article/60dd7d822c3640998459559aa87020ca
Autor:
Jonathan Oppenheim
Publikováno v:
Physical Review X, Vol 13, Iss 4, p 041040 (2023)
The effort to discover a quantum theory of gravity is motivated by the need to reconcile the incompatibility between quantum theory and general relativity. Here, we present an alternative approach by constructing a consistent theory of classical grav
Externí odkaz:
https://doaj.org/article/6a6e37f7b42e4b42a6f1360b3124511b
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 2, Pp 1-39 (2022)
Abstract We study a class of theories in which space-time is treated classically, while interacting with quantum fields. These circumvent various no-go theorems and the pathologies of semi-classical gravity, by being linear in the density matrix and
Externí odkaz:
https://doaj.org/article/bc8b5a4f48e64e2c83cb59891be452d1
Publikováno v:
Quantum, Vol 7, p 891 (2023)
Consistent dynamics which couples classical and quantum degrees of freedom exists, provided it is stochastic. This dynamics is linear in the hybrid state, completely positive and trace preserving. One application of this is to study the back-reaction
Externí odkaz:
https://doaj.org/article/7b534632950e4e678b3d2b2396849587
Autor:
Andrzej Grudka, Michael J. W. Hall, Michał Horodecki, Ryszard Horodecki, Jonathan Oppenheim, John A. Smolin
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 11, Pp 1-25 (2018)
Abstract Of course not, but if one believes that information cannot be destroyed in a theory of quantum gravity, then we run into apparent contradictions with quantum theory when we consider evaporating black holes. Namely that the no-cloning theorem
Externí odkaz:
https://doaj.org/article/dba64317544f4bf8b92ab0aa1461da87
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 7, Pp 1-70 (2018)
Abstract Recently, it has been shown that for out-of-equilibrium systems, there are additional constraints on thermodynamical evolution besides the ordinary second law. These form a new family of second laws of thermodynamics, which are equivalent to
Externí odkaz:
https://doaj.org/article/6beb06eb0fed419e92f9bbd7f9023997
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-9 (2017)
Is it possible to single out the thermal state from all the passive states even when not operating in the thermodynamic limit? Here, the authors show that an optimal amount of energy can be extracted from any athermal quantum state when using a machi
Externí odkaz:
https://doaj.org/article/02b857f99a3f40ee9b3f08e6a1c362fd
Autor:
Lluís Masanes, Jonathan Oppenheim
Publikováno v:
Nature Communications, Vol 8, Iss 1, Pp 1-7 (2017)
The third law of thermodynamics, first formulated in 1912, states that any process cannot reach absolute zero temperature in finite time. Here, the authors derive the third law in the quantum regime as a bound on the resources necessary to cool a sys
Externí odkaz:
https://doaj.org/article/8ee3f33607c747a2ae5217a5d54b8703