Results 51 to 60 of about 169,125 (319)
Quantum Fisher and Skew information for Unruh accelerated Dirac qubit [PDF]
, 2015 We develop a Bloch vector representation of Unruh channel for a Dirac field mode. This is used to provide a unified, analytical treatment of quantum Fisher and Skew information for a qubit subjected to the Unruh channel, both in its pure form as well as ...
Alok, Ashutosh Kumar +2 more
core +2 more sources
Hidden nonmacrorealism: Reviving the Leggett-Garg inequality with stochastic operations
Physical Review Research, 2021 The Leggett-Garg inequality (LGI) distinguishes nonmacrorealistic channels from macrorealistic ones by constraining the experimental outcomes of the underlying system. In this work, we propose a class of channels which, initially, cannot violate the LGI (
Huan-Yu Ku +7 more
doaj +1 more source
Unveiling the Markovian to non-Markovian transition with quantum collision models
Physics Open, 2023 The concept of non-Markovianity in open quantum systems is traditionally associated with the existence of information backflows from the environment to the system.
Willames F. Magalhães +2 more
doaj +1 more source
Entanglement properties of optical coherent states under amplitude damping [PDF]
, 2010 Through concurrence, we characterize the entanglement properties of optical coherent-state qubits subject to an amplitude damping channel. We investigate the distillation capabilities of known error correcting codes and obtain upper bounds on the ...
C. H. Bennett +6 more
core +3 more sources
Multiparameter Estimation with Two-Qubit Probes in Noisy Channels
Entropy, 2023 This work compares the performance of single- and two-qubit probes for estimating several phase rotations simultaneously under the action of different noisy channels.
Lorcán O. Conlon +2 more
doaj +1 more source
A new mechanism for saturating unstable r-modes in neutron stars [PDF]
, 2013 We consider a new mechanism for damping the oscillations of a mature neutron star. The new dissipation channel arises if superfluid vortices are forced to cut through superconducting fluxtubes.
Andersson, Nils +2 more
core +3 more sources
Cejing jishu, 2023 In the process of oil drilling, the acquisition and real-time transmission of downhole information is very important for the accurate evaluation of formation, reservoir description and development.
WANG Senliang +5 more
doaj +1 more source
Multi-Error-Correcting Amplitude Damping Codes
, 2010 We construct new families of multi-error-correcting quantum codes for the amplitude damping channel. Our key observation is that, with proper encoding, two uses of the amplitude damping channel simulate a quantum erasure channel.
Duan, Runyao +3 more
core +1 more source
Optimal linear optical implementation of a single-qubit damping channel
, 2011 We experimentally demonstrate a single-qubit decohering quantum channel using linear optics. We implement the channel, whose special cases include both the amplitude-damping channel and the bit-flip channel, using a single, static optical setup ...
Fisher, Kent +3 more
core +1 more source
IEEE Access, 2019 In this paper, a novel protocol for asymmetric bidirectional controlled quantum teleportation (ABCQT) by using the nine-qubit entangled state as a quantum channel is proposed.
Ri-Gui Zhou +4 more
doaj +1 more source