SCHEME FOR DIRECT MEASURING QUASIPROBABILITY DISTRIBUTIONS OF N TRAPPED IONS IN THE DISPERSIVE REGIME

In this letter, a procedure is proposed for reconstructing the motional quantum state of N trapped ions. Unlike other previous schemes, the present scheme works in the dispersive regime in the presence of dissipation. In our scheme, we show that it is possible to directly measure the quasiprobability distribution function corresponding to the motional coherent state in a trapped-ion system subjected to dissipation. We also provide an example of a motional Schrödinger cat state reconstruction to exemplify our procedure.

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Teleporting the Schrödinger Cat State

Modern Physics Letters B ◽

10.1142/s0217984998001438 ◽

1998 ◽

Vol 12 (29n30) ◽

pp. 1209-1216 ◽

Cited By ~ 6

Author(s):

M. H. Y. Moussa ◽

B. Baseia

Keyword(s):

Coherent State ◽

Quantum Channel ◽

Coherent States ◽

Joint Measurement ◽

Bell Basis ◽

Schrödinger Cat ◽

Schrodinger Cat State

We present a scheme for the teleportation of a coherent state or a mesoscopic superposition of coherent states — the Schrödinger-cat state. The proposal involves a mesoscopic-correlated state as the quantum channel which is generated through an adaptation of a quantum switch scheme. The required joint measurement performed in a mesoscopic Bell basis is accomplished through a technique for detection of a Schrödinger-cat state "trapped" in a cavity.

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The Schrödinger cat state of trapped ions in harmonic and anharmonic oscillator traps

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/35/7/303 ◽

2002 ◽

Vol 35 (7) ◽

pp. 1643-1656 ◽

Cited By ~ 9

Author(s):

S Shelly Sharma ◽

N K Sharma

Keyword(s):

Anharmonic Oscillator ◽

Trapped Ions ◽

Schrödinger Cat ◽

Schrodinger Cat State

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Collapses and revivals of the coherence of a mesoscopic superposition of motional states.

Australian Journal of Physics ◽

10.1071/ph99056 ◽

2000 ◽

Vol 53 (3) ◽

pp. 413 ◽

Cited By ~ 1

Author(s):

Shi-Biao Zheng

Keyword(s):

Coherent States ◽

Quantum Coherence ◽

Vibrational Excitation ◽

Ion Motion ◽

Trapped Ion ◽

Schrödinger Cat ◽

Excitation Exchange ◽

Schrodinger Cat State

A scheme is proposed to observe the collapses and revivals of a mesoscopic superposition of coherent states in the motion of a trapped ion. In the scheme the ion motion in the x-axis is first prepared in a Schrödinger cat state, and then coupled to the motion in the z-axis. With the vibrational excitation exchange between the two modes, the mesoscopic quantum coherence collapses and revives periodically, providing an example for complementarity.

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Phase-space studies of backscattering diffraction of defective Schrödinger cat states

Scientific Reports ◽

10.1038/s41598-021-90738-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Damian Kołaczek ◽

Bartłomiej J. Spisak ◽

Maciej Wołoszyn

Keyword(s):

Phase Space ◽

Dispersive Medium ◽

Wigner Distribution ◽

Interference Term ◽

Wigner Distribution Function ◽

The Subject ◽

Schrödinger Cat ◽

Cat States ◽

Schrodinger Cat State ◽

Space Approach

AbstractThe coherent superposition of two well separated Gaussian wavepackets, with defects caused by their imperfect preparation, is considered within the phase-space approach based on the Wigner distribution function. This generic state is called the defective Schrödinger cat state due to this imperfection which significantly modifies the interference term. Propagation of this state in the phase space is described by the Moyal equation which is solved for the case of a dispersive medium with a Gaussian barrier in the above-barrier reflection regime. Formally, this regime constitutes conditions for backscattering diffraction phenomena. Dynamical quantumness and the degree of localization in the phase space of the considered state as a function of its imperfection are the subject of the performed analysis. The obtained results allow concluding that backscattering communication based on the defective Schrödinger cat states appears to be feasible with existing experimental capabilities.

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