Results 1 to 10 of about 96,137 (178)
Beating no-go theorems by engineering defects in quantum spin models [PDF]
New Journal of Physics, 2015 Diverse no-go theorems exist, ranging from no-cloning to monogamies of quantum correlations and Bell inequality violations, which restrict the processing of information in the quantum world.
Debasis Sadhukhan +4 more
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Hyperdense coding and superadditivity of classical capacities in hypersphere theories
New Journal of Physics, 2015 In quantum superdense coding, two parties previously sharing entanglement can communicate a two bit message by sending a single qubit. We study this feature in the broader framework of general probabilistic theories.
Serge Massar +2 more
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Information transmission with continuous variable quantum erasure channels [PDF]
Quantum, 2023 Quantum capacity, as the key figure of merit for a given quantum channel, upper bounds the channel's ability in transmitting quantum information. Identifying different types of channels, evaluating the corresponding quantum capacity, and finding the ...
Changchun Zhong +2 more
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Entanglement-assisted quantum MDS codes from generalized Reed–Solomon codes [PDF]
Quantum Information Processing, 2021 In this paper, we produce some new classes of entanglement-assisted quantum MDS codes(EAQMDS codes for short) via generalized Reed-Solomon codes over finite fields of odd characteristic. Among our constructions, there are many EAQMDS codes with new lengths which have never been reported.
Renjie Jin, Yiran Cao, Jinquan Luo
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Topological Defects in General Quantum LDPC Codes [PDF]
, 2021 We consider the structure of defects carrying quantum information in general quantum low-density parity-check (LDPC) codes. These generalize the corresponding constructions for topological quantum codes, without the need for locality. Relation of such defects to (generalized) topological entanglement entropy is also discussed.
Lim, Pak Kau +2 more
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Generalized concatenated quantum codes [PDF]
Physical Review A, 2009 We introduce the concept of generalized concatenated quantum codes. This generalized concatenation method provides a systematical way for constructing good quantum codes, both stabilizer codes and nonadditive codes. Using this method, we construct families of new single-error-correcting nonadditive quantum codes, in both binary and nonbinary cases ...
Grassl, Markus +4 more
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Generalized concatenation for quantum codes [PDF]
2009 IEEE International Symposium on Information Theory, 2009 We show how good quantum error-correcting codes can be constructed using generalized concatenation. The inner codes are quantum codes, the outer codes can be linear or nonlinear classical codes. Many new good codes are found, including both stabilizer codes as well as so-called nonadditive codes.
Grassl, Markus +2 more
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Quantum-Classical Hybrid Systems and their Quasifree Transformations [PDF]
Quantum, 2023 We study continuous variable systems, in which quantum and classical degrees of freedom are combined and treated on the same footing. Thus all systems, including the inputs or outputs to a channel, may be quantum-classical hybrids.
Lars Dammeier, Reinhard F. Werner
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Generalized noiseless quantum codes utilizing quantum enveloping algebras [PDF]
Journal of Physics A: Mathematical and General, 2001 A generalization of the results of Rasetti and Zanardi concerning avoiding errors in quantum computers by using states preserved by evolution is presented. The concept of dynamical symmetry is generalized from the level of classical Lie algebras and groups to the level of dynamical symmetry based on quantum Lie algebras and quantum groups (in the sense
Đurđevich, Micho +2 more
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Dense Coding with Locality Restriction on Decoders: Quantum Encoders versus Superquantum Encoders
PRX Quantum, 2022 We investigate practical dense coding by imposing locality restrictions on decoders and symmetry restrictions on encoders within the resource theory of asymmetry framework.
Masahito Hayashi, Kun Wang
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