Mirage cosmology with an unstable probe D3-brane

Jeong, Dong Hyeok; Kim, Jin Young

doi:10.1103/physrevd.72.087503

Cited by 26 publications

(56 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[40]. The analysis of the performance of that scheme under decoherence shows that these states are practically realizable ones [41] and the necessary phase shift can be achieved by weak cross-Kerr nonlinearities realizable in present experiments [42][43][44][45]. In our proposed schemes the nonclassical states are prepared conditionally depending on the results of the homodyne measurements.…”

Section: Introductionmentioning

confidence: 89%

Quantum state engineering via coherent-state superpositions in traveling optical fields

et al. 2018

View full text Add to dashboard Cite

We propose two experimental schemes for producing coherent-state superpositions which approximate different nonclassical states conditionally in traveling optical fields. Although these setups are constructed of a small number of linear optical elements and homodyne measurements, they can be used to generate various photon number superpositions in which the number of constituent states can be higher than the number of measurements in the schemes. We determine numerically the parameters to achieve maximal fidelity of the preparation for a large variety of nonclassical states, such as amplitude squeezed states, squeezed number states, binomial states and various photon number superpositions. The proposed setups can generate these states with high fidelities and with success probabilities that can be promising for practical applications.

show abstract

Section: Introductionmentioning

confidence: 89%

Quantum state engineering via coherent-state superpositions in traveling optical fields

et al. 2018

View full text Add to dashboard Cite

show abstract

“…By converting the sum over n ∆ to an integral in Eqs. (21) and (26) and comparing their matrix elements in the photon-number basis, it can be shown that these two forms of ˆR ρ are equivalent provided that Eq. (25) is satisfied.…”

Section: Perturbation Theorymentioning

confidence: 99%

Origin of quantum noise and decoherence in distributed amplifiers

Franson

Kirby

2015

Phys. Rev. A

View full text Add to dashboard Cite

The use of distributed amplifiers may have some potential advantages for the transmission of quantum information through optical fibers. In addition to the quantum noise introduced by the amplifiers, entanglement between atoms in the amplifying media and the optical field corresponds to which-path information that can further reduce the coherence. Here we analyze the effects of decoherence in a phaseinsensitive distributed amplifier by using perturbation theory to calculate the state of the entire system including the atomic media. For an initial coherent state, tracing over the atomic states allows the reduced density matrix of the field to be expressed as a mixture of squeezed states with a reduced spread in photon number and an increased phase uncertainty. The amplifier noise and decoherence can be interpreted as being due to entanglement with the environment rather than the amplification of vacuum fluctuation noise.

show abstract

“…Moreover, these superpositions are not placed symmetric with respect to the origin, but have a large coherent amplitude. Separation of the constituent states can be increased at a cost of increasing the intensity arXiv:1511.06531v1 [quant-ph] 20 Nov 2015 of the input coherent beam [7]. One possibility to prepare CSS in such a scheme is to displace the states [7] by a high transmission beam splitter and a second coherent beam.…”

Section: Introductionmentioning

confidence: 99%

“…Separation of the constituent states can be increased at a cost of increasing the intensity arXiv:1511.06531v1 [quant-ph] 20 Nov 2015 of the input coherent beam [7]. One possibility to prepare CSS in such a scheme is to displace the states [7] by a high transmission beam splitter and a second coherent beam. Experimentally the intensities needed for the displacement do not appear realistic.…”

Section: Introductionmentioning

confidence: 99%

Conditional generation of optical Schrödinger cat states

et al. 2010

View full text Add to dashboard Cite

Given a source of two coherent state superpositions with small separation in a traveling wave optical setting, we show that by interference and balanced homodyne measurement it is possible to conditionally prepare a symmetrically placed superposition of coherent states around the origo of the phase space. The separation of the coherent states in the superposition will be amplified during the process.

show abstract

Mirage cosmology with an unstable probe D3-brane

Cited by 26 publications

References 56 publications

Quantum state engineering via coherent-state superpositions in traveling optical fields

Quantum state engineering via coherent-state superpositions in traveling optical fields

Origin of quantum noise and decoherence in distributed amplifiers

Conditional generation of optical Schrödinger cat states

Contact Info

Product

Resources

About