Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Kristjánsson, Hlér"'
Autor:
Kristjánsson, Hlér, Odake, Tatsuki, Yoshida, Satoshi, Taranto, Philip, Bavaresco, Jessica, Quintino, Marco Túlio, Murao, Mio
Quantum theory is consistent with a computational model permitting black-box operations to be applied in an indefinite causal order, going beyond the standard circuit model of computation. The quantum switch -- the simplest such example -- has been s
Externí odkaz:
http://arxiv.org/abs/2409.18420
Autor:
Bavaresco, Jessica, Yoshida, Satoshi, Odake, Tatsuki, Kristjánsson, Hlér, Taranto, Philip, Murao, Mio, Quintino, Marco Túlio
Higher-order transformations that act on a certain number of input quantum channels in an indefinite causal order - such as the quantum switch - cannot be described by standard quantum circuits that use the same number of calls of the input quantum c
Externí odkaz:
http://arxiv.org/abs/2409.18202
Manipulating Hamiltonians governing physical systems has found a broad range of applications, from quantum chemistry to semiconductor design. In this work, we provide a new way of manipulating Hamiltonians, by transforming their eigenvalues while kee
Externí odkaz:
http://arxiv.org/abs/2312.08848
Publikováno v:
Phys. Rev. Research 6, L012063 (2024)
We present a quantum algorithm to achieve higher-order transformations of Hamiltonian dynamics. Namely, the algorithm takes as input a finite number of queries to a black-box seed Hamiltonian dynamics to simulate a desired Hamiltonian. Our algorithm
Externí odkaz:
http://arxiv.org/abs/2303.09788
Large-scale communication networks, such as the internet, rely on routing packets of data through multiple intermediate nodes to transmit information from a sender to a receiver. In this paper, we develop a model of a quantum communication network th
Externí odkaz:
http://arxiv.org/abs/2208.00480
Over the past decade, a number of quantum processes have been proposed which are logically consistent, yet feature a cyclic causal structure. However, there is no general formal method to construct a process with an exotic causal structure in a way t
Externí odkaz:
http://arxiv.org/abs/2206.10042
Quantum information can provide a lens for characterizing the operational implications of spacetime physics. A well-known result in this area is that quantum entanglement is degraded in the vicinity of a black hole. This result treats the black hole
Externí odkaz:
http://arxiv.org/abs/2203.05861
Publikováno v:
Quantum 5, 503 (2021)
We argue that the quantum-theoretical structures studied in several recent lines of research cannot be adequately described within the standard framework of quantum circuits. This is in particular the case whenever the combination of subsystems is de
Externí odkaz:
http://arxiv.org/abs/2011.08120
Autor:
Rubino, Giulia, Rozema, Lee A., Ebler, Daniel, Kristjánsson, Hlér, Salek, Sina, Guérin, Philippe Allard, Abbott, Alastair A., Branciard, Cyril, Brukner, Časlav, Chiribella, Giulio, Walther, Philip
Publikováno v:
Phys. Rev. Research 3, 013093 (2021)
In quantum communication networks, wires represent well-defined trajectories along which quantum systems are transmitted. In spite of this, trajectories can be used as a quantum control to govern the order of different noisy communication channels, a
Externí odkaz:
http://arxiv.org/abs/2007.05005
When a noisy communication channel is used multiple times, the errors occurring at different times generally exhibit correlations. Classically, these correlations do not affect the evolution of individual particles: a single classical particle can on
Externí odkaz:
http://arxiv.org/abs/2004.06090