Zobrazeno 1 - 10
of 958
pro vyhledávání: '"P Fullwood"'
Autor:
Lie, Seok Hyung, Fullwood, James
The quantum state over time formalism provides an extension of the density operator formalism into the time domain, so that quantum correlations across both space and time may be treated with a common mathematical formalism. While bipartite quantum s
Externí odkaz:
http://arxiv.org/abs/2410.22630
While the quantum mutual information is a fundamental measure of quantum information, it is only defined for spacelike-separated quantum systems. Such a limitation is not present in the theory of classical information, where the mutual information be
Externí odkaz:
http://arxiv.org/abs/2410.02137
Autor:
Parzygnat, Arthur J., Fullwood, James
Two-time expectation values of sequential measurements of dichotomic observables are known to be time symmetric for closed quantum systems. Namely, if a system evolves unitarily between sequential measurements of dichotomic observables $\mathscr{O}_{
Externí odkaz:
http://arxiv.org/abs/2407.11123
Recent studies have shown that quantum information may be effectively transmitted by a finite collection of completely depolarizing channels in a coherent superposition of different orders, via an operation known as the quantum $\tt SWITCH$. Such res
Externí odkaz:
http://arxiv.org/abs/2407.02726
Autor:
Fullwood, James, Parzygnat, Arthur J.
While quantum correlations between two spacelike-separated systems are fully encoded by the bipartite density operator associated with the joint system, we prove that there does not exist an operator representation for general quantum correlations ac
Externí odkaz:
http://arxiv.org/abs/2405.17555
Autor:
Fullwood, James
The theory of quantum states over time provides an approach to the dynamics of quantum information which is in direct analogy with spacetime and its relation to classical dynamics. In this work, we further such an analogy by formulating a notion of g
Externí odkaz:
http://arxiv.org/abs/2311.00162
Publikováno v:
Phys. Rev. Lett. 132, 110203 (2024)
The quantum no-broadcasting theorem states that it is impossible to produce perfect copies of an arbitrary quantum state, even if the copies are allowed to be correlated. Here we show that, although quantum broadcasting cannot be achieved by any phys
Externí odkaz:
http://arxiv.org/abs/2310.13049
Autor:
Fozia Zahir Ahmed, Camilla Sammut‐Powell, Glen P. Martin, Paul Callan, Colin Cunnington, Matthew Kahn, Mita Kale, Toni Weldon, Rachel Harwood, Catherine Fullwood, Bart Gerritse, David Lanctin, Nelson Soken, Niall G. Campbell, Joanne K. Taylor
Publikováno v:
ESC Heart Failure, Vol 11, Iss 5, Pp 2637-2647 (2024)
Abstract Aims Clinical pathways have been shown to improve outcomes in patients with heart failure (HF). Although patients with HF often have a cardiac implantable electronic device, few studies have reported the utility of device‐derived risk scor
Externí odkaz:
https://doaj.org/article/dad0ce47500d42d898d5241cc263fc60
Autor:
Fullwood, James, Parzygnat, Arthur J.
In this work, we use the theory of quantum states over time to define an entropy $S(\rho,\mathcal{E})$ associated with quantum processes $(\rho,\mathcal{E})$, where $\rho$ is a state and $\mathcal{E}$ is a quantum channel responsible for the dynamica
Externí odkaz:
http://arxiv.org/abs/2306.01831
Autor:
Fullwood, James
While in relativity theory space evolves over time into a single entity known as spacetime, quantum theory lacks a standard notion of how to encapsulate the dynamical evolution of a quantum state into a single "state over time". Recently it was empha
Externí odkaz:
http://arxiv.org/abs/2304.03954