Measuring Gravitational Effect of Superintense Laser by Spin-Squeezed Bose-Einstein Condensates Interferometer

In this article, we consider an extremely intense laser, enclosed by an atom interferometer. The gravitational potential generated from the high-intensity laser is solved from the Einstein field equation under the Newtonian limit. We compute the strength of the gravitational force and study the feasibility of measuring the force by the atom interferometer. The intense laser field from the laser pulse can induce a phase change in the interferometer with Bose-Einstein condensates. We push up the sensitivity limit of the interferometer with Bose-Einstein condensates by spin-squeezing effect and determine the sensitivity gap for measuring the gravitational effect from intense laser by atom interferometer.

The Jaynes–Cummings model of a two-level atom in a single-mode para-Bose cavity field

The coherent states in the parity deformed analog of standard boson Glauber coherent states are generated, which admit a resolution of unity with a positive measure. The quantum-mechanical nature of the light field of these para-Bose states is studied, and it is found that para-Bose order plays an important role in the nonclassical behaviors including photon antibunching, sub-Poissonian statistics, signal-to-quantum noise ratio, quadrature squeezing effect, and multi-peaked number distribution. Furthermore, we consider the Jaynes-Cummings model of a two-level atom in a para-Bose cavity field with the initial states of the excited and Glauber coherent ones when the atom makes one-photon transitions, and obtain exact energy spectrum and eigenstates of the deformed model. Nonclassical properties of the time-evolved para-Bose atom-field states are exhibited through evaluating the fidelity, evolution of atomic inversion, level damping, and von Neumann entropy. It is shown that the evolution time and the para-Bose order control these properties.

On the Influence of Pile Foundation Settlement of Existing High-Rise Buildings on the Surrounding Buildings

Pile foundation settlement is a kind of foundation form. In recent years, because of the increasing population and economic development in China, high-rise buildings have emerged in people’s vision. Due to the development of engineering construction, the type and technology of pile foundation, as well as the control and detection of the single pile and pile group have been greatly improved. In view of the influence of pile foundation settlement on the surrounding environment of high-rise buildings, this paper mainly studies from the angle of single pile settlement and pile group settlement. According to the construction method of pile foundation, the static pressure sinking pipe cast-in-place pile can produce soil squeezing effect in pile foundation construction. The experimental analysis was carried out. According to the engineering example, finite element numerical simulation is used to analyze the influence degree of pile foundation settlement on adjacent buildings with and without raft, and the feasibility and correctness of numerical simulation are analyzed by comparing the simulation results with the measured values. This paper mainly studies the influence of pile foundation settlement of high-rise buildings on surrounding buildings from the aspects of problems and solutions.

Generating new nonclassical state by repeatedly operating number operator on coherent state

In this paper, using the principle of quantum state superposition, we report a nonclassical quantum state which is constructed by repeatedly operating the number operator on the coherent state. Nonclassical effects of this state are discussed by photon-number distribution, sub-Poissonian statistics, anti-bunching and negativity of Wigner function and squeezing effect. Our work provides an important nonclassical resource, which may be used in quantum communication and quantum optics.

How Complementors Benefit from Taking Competition to the System Level

In many industries, multiple independent complementors supply the individual components of a system. In this paper, we develop a formal model to examine the tensions and tradeoffs that result when a firm—either one of the complementors or a de novo entrant—takes competition to the system level by launching an integrated offering that combines the multiple components. A complementor who takes competition to the system level becomes a competitor to itself at the system level. As a consequence, the task of maintaining the competitiveness of the multiple-component system rests on the shoulders of the remaining complementor. We show that this allows the integrator to earn additional profits at the expense of the complementor—that is, it can raise the price of its component and thereby squeeze the margin of its complementor. We find that this squeezing effect can be so strong that offering an integrated system is profitable even if the system itself is unprofitable. Interestingly, when analyzing the possibility of entry by a de novo integrator who does not suffer from self-cannibalization, we show that an incumbent complementor may nevertheless have stronger incentives to launch an integrated offering. This is because the incumbent's ability to benefit from squeezing its complementor and earn additional profits on cannibalized sales leads to an entrant's disadvantage when taking competition to the system level. We also discuss defense strategies for complementors to shield themselves against the consequences of integration by their complementor. This paper was accepted by Joshua Gans, business strategy.

Pb2.28Ba1.72B10O19 Featuring Three-dimensional B-O Anionic Network with Edge-Sharing [BO4] Obtained under Ambient Pressure

The first borate featuring three-dimensional B-O anionic network with edge-sharing (ES) [BO4] unit, Pb2.28Ba1.72B10O19 (PbBaBO), has been synthesized under ambient pressure. The squeezing effect of the 2∞[B10O19] bilayer structure on...

Nonperturbative Squeezed and Entangled Collinear Gluon States

We consider for the first time nonperturbative gluon state evolution up to the second order of smallness in time. Investigating gluon fluctuations at the nonperturbative stage we have proved theoretically the possibility of the existence of both single- and two-mode gluon squeezed states. The emergence of such remarkable states becomes pоssible owing to threeand four-gluon self-interactions. The three-gluon self-interaction leads to the squeezing effect at the next time stage of nonperturbative evolution.We have shown that the nonperturbative evolution during a short time leads both to colour squeezing and entanglement of gluons.