Uncertainty principle in larmor clock

Qiao, Chuan; Ren, Zhongzhou

doi:10.1088/1674-1137/35/11/002

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…The collapse of the wavefunction effected by the measurement, and, somewhat symmetrically, preparation, certainly are not instantaneous but are associated with some finite duration. For Larmor precession, taking into account the uncertainty relation for spin components is strictly required, and the associated time depends on the height and width of the barrier; the tunneling particle is tied (with only a little disturbance) to the outside CM world, i.e., via the magnet field in a weak measurement with man repetitions [ 140 , 141 ].…”

Section: Tunnelingmentioning

confidence: 99%

Timelessness Strictly inside the Quantum Realm

Thomsen¹

2021

Entropy

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Time is one of the undisputed foundations of our life in the real world. Here it is argued that inside small isolated quantum systems, time does not pass as we are used to, and it is primarily in this sense that quantum objects enjoy only limited reality. Quantum systems, which we know, are embedded in the everyday classical world. Their preparation as well as their measurement-phases leave durable records and traces in the entropy of the environment. The Landauer Principle then gives a quantitative threshold for irreversibility. With double slit experiments and tunneling as paradigmatic examples, it is proposed that a label of timelessness offers clues for rendering a Copenhagen-type interpretation of quantum physics more “realistic” and acceptable by providing a coarse but viable link from the fundamental quantum realm to the classical world which humans directly experience.

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Section: Tunnelingmentioning

confidence: 99%

Timelessness Strictly inside the Quantum Realm

Thomsen¹

2021

Entropy

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“…Then the Y (4260) was confirmed by the Belle and CLEO collaborations [2,3]. There have been several possible assignments for the Y (4260) since its observation, such as the tetraquark state [4,5,6,7,8,9,10,11], hybrid states [12,13,14], hadro-charmonium state [15], molecular state [16,17], kinematical effect [18,19], baryonium state [20], etc.…”

Section: Introductionmentioning

confidence: 99%

Lowest vector tetraquark states: Y(4260 / 4220) or $$Z_c(4100)$$ Z c ( 4100 )

Wang

2018

Eur. Phys. J. C

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In this article, we take the Y (4260/4220) as the vector tetraquark state with J P C = 1 −− , and construct the Cγ5⊗ ↔ ∂ µ ⊗γ5C type diquark-antidiquark current to study its mass and pole residue with the QCD sum rules in details by taking into account the vacuum condensates up to dimension 10 in a consistent way. The predicted mass MY = 4.24 ± 0.10 GeV is in excellent agreement with experimental data and supports assigning the Y (4260/4220) to be the Cγ5⊗ ↔ ∂ µ ⊗γ5C type vector tetraquark state, and disfavors assigning the Zc(4100) to be the Cγ5⊗ ↔ ∂ µ ⊗γ5C type vector tetraquark state. It is the first time that the QCD sum rules have reproduced the mass of the Y (4260/4220) as a vector tetraquark state.

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“…Some theoretical interpretations for the Y (4260) are: tetraquark state [11], hadronic D 1 D, D 0 D * molecule [12], χ c1 ω molecule [13], χ c1 ρ molecule [14], J/ψf 0 (980) molecule [15], a hybrid charmonium [16], a charmbaryonium [17], a cusp [18][19][20], etc. Within the available experimental information, none of these suggestions can * raphael@ift.unesp.br † mnielsen@if.usp.br ‡ carina.zanetti@gmail.com be completely ruled out.…”

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confidence: 99%

Production of the Y(4260) state in B meson decay

2015

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Presidente Dutra Km 298, Pólo Industrial, 27537-000, Resende/RJ -BrasilWe calculate the branching ratio for the production of the meson Y (4260) in the decay B − → Y (4260)K − . We use QCD sum rules approach and we consider the Y (4260) to be a mixture between charmonium and exotic tetraquark, [cq][qc], states with J P C = 1 −− . Using the value of the mixing angle determined previously as: θ = (53.0 ± 0.5) • , we get the branching ratio B(B → Y (4260)K) = (1.34 ± 0.47) × 10 −6 , which allows us to estimate an interval on the branching fraction 3.0 × 10 −8 < B Y < 1.8 × 10 −6 in agreement with the experimental upper limit reported by Babar Collaboration.

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Uncertainty principle in larmor clock

Cited by 3 publications

References 20 publications

Timelessness Strictly inside the Quantum Realm

Timelessness Strictly inside the Quantum Realm

Lowest vector tetraquark states: Y(4260 / 4220) or $$Z_c(4100)$$ Z c ( 4100 )

Production of the Y(4260) state in B meson decay

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