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Geometry of phase-covariant qubit channels

WebMar 15, 2010 · This paper proposes a simple scheme to generate a four-atom entangled cluster state in cavity quantum electrodynamics. With the assistantce of a strong classical field the cavity is only virtually excited and no quantum information will be transferred from the atoms to the cavity during the preparation for a four-atom entangled cluster state, … WebPhase-covariant qubit channels Themostgeneralformofthephase-covariantqubitchannelreads[27,28] Λ[X]= 1 2 [(I +λ∗σ 3)TrX+λ 1σ 1Tr(σ 1X)+λ 1σ 2Tr(σ 2X)+λ 3σ 3Tr(σ 3X)],(6) whereσ αarethePaulimatrices.Moreover,λ 1andλ 3aretwoofitseigenvalues(λ 1istwo-times …

Related papers: Phase-covariant mixtures of non-unital qubit maps

WebMay 15, 2009 · @article{osti_21300771, title = {Phase-covariant quantum benchmarks}, author = {Calsamiglia, J and Aspachs, M and Munoz-Tapia, R and Bagan, E}, abstractNote = {We give a quantum benchmark for teleportation and quantum storage experiments suited for pure and mixed test states. The benchmark is based on the average fidelity over a … WebSubjects:Quantum Physics (quant-ph) arXiv:2211.01514[pdf, other] Title:Creating large Fock states and massively squeezed states in optics using systems with nonlinear bound states in the continuum Authors:Nicholas Rivera, Jamison Sloan, Yannick Salamin, John D. Joannopoulos, Marin Soljacic Subjects:Quantum Physics (quant-ph) arsip adalah jurnal https://oahuhandyworks.com

Phase-covariant mixtures of non-unital qubit maps

WebMay 20, 2024 · We give an extensive characterization of the channels acting on the qubit system. Seizing the mathematical simplicity of the qubit channels that leave invariant the state with highest entropy, we present … WebII. OPTIMAL PHASE-COVARIANT CLONING A cloning map is a special kind of quantum channel, i.e. a trace-preserving CP map. In the cloning case, the CP mapC goes from … WebApr 17, 2024 · By focusing on the frequency estimation in the presence of phase-covariant noise, as the first main example to demonstrate the reliability and efficiency of the method, a useful prescription for practical estimation is provided, by determining the optimal initial state and the optimal measurement. banana and palm beer

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Geometry of phase-covariant qubit channels

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http://arxiv-export3.library.cornell.edu/abs/2210.17448v2 WebJun 29, 2024 · Programmability of covariant quantum channels Martina Gschwendtner1,2,Andreas Bluhm3, andAndreas Winter4,5 1Munich Center for Quantum …

Geometry of phase-covariant qubit channels

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WebDespite counter-examples like the two-Pauli channel, the possibility that the set of single Md = R M S (10) qubit channels simulated using a mixed state environ- ment may occupy a sizable volume in the space of single where R and S are real orthogonal matrices with unit de- qubit channels remains open, and it may turn out that terminant and Md ... WebJun 9, 2024 · We define the quantum-incoherent relative entropy of coherence ( \mathcal {QI} REC) of quantum channels in the framework of the resource theory by using the Choi–Jamiolkowski isomorphism. Coherence-breaking channels are introduced as free operations and their corresponding Choi states as free states.

WebAug 23, 2024 · We formulate a covariant description of a relativistic qubit identified with an irreducible set of quantum spin states of a Majorana particle with a sharp momentum. We treat the particle’s four-momentum as an external parameter. We show that it is possible to define an interesting time evolution of the spin density matrix of such a qubit. WebISSN 1995-0802, LobachevskiiJournal ofMathematics,2024, Vol.41, No.4, pp. 617–630. c PleiadesPublishing,Ltd.,2024. Phase Covariant Qubit Dynamics and Divisibility S ...

WebJun 21, 2024 · Geometry of phase-covariant qubit channels [0.0] We derive the Hilbert-Schmidt line and volume elements using the channel eigenvalues together with the parameter that characterizes non-unitality.

WebJul 29, 2024 · We find a set of quantum channels attainable in the completely positive divisible phase covariant dynamics and show that this set coincides with the set of …

WebPhase covariant qubit dynamics and divisibility S. N. Filippov,1,2,3 A. N. Glinov,1,2 and L. Leppäjärvi4 1Steklov Mathematical Institute of Russian Academy of Sciences, Gubkina St. 8, Moscow 119991, Russia 2Moscow Institute of Physics and Technology, Institutskii Per. 9, Dolgoprudny 141700, Russia 3Valiev Institute of Physics and Technology of Russian … arsiparis ahli utamaWebMar 29, 2024 · Phase covariant qubit dynamics describes an evolution of a two-level system under simultaneous action of pure dephasing, energy dissipation, and energy … banana and orange juiceWebWe analyze the geometry on the space of non-unital phase-covariant qubit maps. Using the corresponding Choi-Jamiołkowski states, we derive the Hilbert-Schmidt line and … banana and nut cake ukWebJun 7, 2024 · Although the unavoidable effects of environmental noise often cancel out any quantum advantage [12–16], a super-extensive growth of the efficiency may still be attained under time-inhomogeneous phase-covariant noise [17–20], and even more generic Ohmic dissipation , noise with a particular geometry [22, 23], or setups involving quantum ... banana and oat vegan pancakes recipeWebJun 21, 2024 · We analyze convex combinations of non-unital qubit maps that are phase-covariant. In particular, we consider the behavior of maps that combine amplitude … arsiparis adalahWebGeometry of phase-covariant qubit channels Katarzyna Siudzińska Institute of Physics, Faculty of Physics, Astronomy and Informatics Nicolaus Copernicus University in Toruń, ul. Grudziądzka 5, 87–100 Toruń, Poland We analyze the geometry on the space of non-unital phase-covariant qubit maps. Using the arsiparis ahli mudaWebMar 15, 2007 · @article{osti_20982251, title = {Simulating a single-qubit channel using a mixed-state environment}, author = {Narang, Geetu and Arvind, and Department of Physics, Indian Institute of Madras, 600036}, abstractNote = {We analyze the class of single-qubit channels with the environment modeled by a one-qubit mixed state. The set of affine … banana and pajama