QUANTUM TELEPORTATION FROM LIGHT TO ATOMIC BOSE–EINSTEIN CONDENSATE

An optical scheme of the quantum teleportation of superposed coherent states from light pulse to the atoms in Bose–Einstein condensate in terms of optical elements is presented. Beam splitters, photodetectors, cross-Kerr medium, and coherent state sources are needed in this scheme. The probability of successful teleportation is also obtained.

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Coherent state approach to the cross-collisional effects in the population dynamics of a two-mode Bose–Einstein condensate

Annals of Physics ◽

10.1016/j.aop.2009.05.008 ◽

2009 ◽

Vol 324 (9) ◽

pp. 1837-1846 ◽

Cited By ~ 5

Author(s):

Thiago F. Viscondi ◽

K. Furuya ◽

M.C. de Oliveira

Keyword(s):

Population Dynamics ◽

Coherent State ◽

Einstein Condensate ◽

Bose Einstein Condensate ◽

The Cross ◽

Bose Einstein

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The squeezing properties in the system of two-mode SU (1, 1) coherent states interacting with Bose-Einstein Condensate of two-level atoms

2011 International Conference on Consumer Electronics, Communications and Networks (CECNet) ◽

10.1109/cecnet.2011.5768841 ◽

2011 ◽

Author(s):

Wang Lei ◽

Sun Changyong

Keyword(s):

Coherent States ◽

Einstein Condensate ◽

Bose Einstein Condensate ◽

Bose Einstein

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EXCITON-PHONON PACKETS WITH BOSE–EINSTEIN CONDENSATE

International Journal of Modern Physics B ◽

10.1142/s0217979203020429 ◽

2003 ◽

Vol 17 (28) ◽

pp. 5289-5293

Author(s):

D. ROUBTSOV ◽

Y. LÉPINE

Keyword(s):

Wave Function ◽

Coherent State ◽

Einstein Condensate ◽

Einstein Condensation ◽

Inhomogeneous State ◽

Bose Einstein Condensation ◽

Bose Einstein Condensate ◽

Bose Einstein

We discuss the possibility for a moving droplet of excitons and phonons to form a coherent state inside the packet. We describe such an inhomogeneous state in terms of Bose–Einstein condensation and prescribe it a macroscopic wave function. Existence and, thus, coherency of such a Bose-core inside the droplet can be checked experimentally if two moving packets are allowed to interact.

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ON SUPERFLUIDITY AND SUPPRESSED LIGHT SCATTERING IN BECs

Modern Physics Letters B ◽

10.1142/s0217984906011141 ◽

2006 ◽

Vol 20 (12) ◽

pp. 675-681

Author(s):

ZAIRA NAZARIO ◽

DAVID I. SANTIAGO

Keyword(s):

Light Scattering ◽

Coherent State ◽

Ground State ◽

Energy State ◽

Einstein Condensate ◽

Bose Einstein Condensate ◽

Low Energies ◽

Bose Einstein

We show that the suppression of light scattering off a Bose Einstein Condensate is equivalent to the Landau argument for superfluidity and thus is a consequence of the Principle of Superfluidity. The superfluid ground state of a BEC contains nonseparable, nontrivial correlations between the bosons that make up the system, i.e., it is entangled. The correlations in the ground state entangle the bosons into a coherent state for the lowest energy state. The entanglement is so extreme that the bosons that make up the system cannot be excited at long wavenumbers. Their existence at low energies is impossible. Only quantum sound can be excited, i.e. the excitations are Bogolyubov quasiparticles which do not resemble free bosons whatsoever at low energies. This means that the system is superfluid by the Landau argument and the superfluidity is ultimately the reason for suppressed scattering at low wavelengths.

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Intrinsic Decoherence and Recurrences in a Large Ferromagnetic F = 1 Spinor Bose–Einstein Condensate

Symmetry ◽

10.3390/sym13010067 ◽

2020 ◽

Vol 13 (1) ◽

pp. 67

Author(s):

Juan Carlos Sandoval-Santana ◽

Roberto Zamora-Zamora ◽

Rosario Paredes ◽

Victor Romero-Rochín

Keyword(s):

Density Matrix ◽

Coherent States ◽

Rotational Symmetry ◽

Einstein Condensate ◽

Body Density ◽

Intrinsic Decoherence ◽

Bose Einstein Condensate ◽

Spin Interactions ◽

The One ◽

Bose Einstein

Decoherence with recurrences appear in the dynamics of the one-body density matrix of an F=1 spinor Bose–Einstein condensate, initially prepared in coherent states, in the presence of an external uniform magnetic field and within the single mode approximation. The phenomenon emerges as a many-body effect of the interplay of the quadratic Zeeman effect, which breaks the rotational symmetry, and the spin-spin interactions. By performing full quantum diagonalizations, a very accurate time evolution of large condensates is analyzed, leading to heuristic analytic expressions for the time dependence of the one-body density matrix, in the weak and strong interacting regimes, for initial coherent states. We are able to find accurate analytical expressions for both the decoherence and the recurrence times, in terms of the number of atoms and strength parameters, which show remarkable differences depending on the strength of the spin-spin interactions. The features of the stationary states in both regimes are also investigated. We discuss the nature of these limits in light of the thermodynamic limit.

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