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Deterministic Creation of Macroscopic Cat States.

Lombardo D, Twamley J - Sci Rep (2015)

Bottom Line: Despite current technological advances, observing quantum mechanical effects outside of the nanoscopic realm is extremely challenging.In this work we develop a completely deterministic method of macroscopic quantum state creation.It is found that by using a Bose-Einstein condensate as a membrane high fidelity cat states with spatial separations of up to ∼300 nm can be achieved.

View Article: PubMed Central - PubMed

Affiliation: Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia.

ABSTRACT
Despite current technological advances, observing quantum mechanical effects outside of the nanoscopic realm is extremely challenging. For this reason, the observation of such effects on larger scale systems is currently one of the most attractive goals in quantum science. Many experimental protocols have been proposed for both the creation and observation of quantum states on macroscopic scales, in particular, in the field of optomechanics. The majority of these proposals, however, rely on performing measurements, making them probabilistic. In this work we develop a completely deterministic method of macroscopic quantum state creation. We study the prototypical optomechanical Membrane In The Middle model and show that by controlling the membrane's opacity, and through careful choice of the optical cavity initial state, we can deterministically create and grow the spatial extent of the membrane's position into a large cat state. It is found that by using a Bose-Einstein condensate as a membrane high fidelity cat states with spatial separations of up to ∼300 nm can be achieved.

No MeSH data available.


Related in: MedlinePlus

The dynamics of the MITM model in both the reflective membrane regime (a) and transparent membrane regime (b). Both results were produced via evolution of the initial state  for a BEC type membrane in units of mechanical frequency where Ω = 15.2 kHz, g0 = 32.8 Ω and J = π Ω. In (a) the membrane’s oscillation amplitude is directly proportional to the number of photons in the cavity N. (b) shows that by evolving the system in the transparent membrane regime the number of photons in each of the cavities can be interchanged.
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f3: The dynamics of the MITM model in both the reflective membrane regime (a) and transparent membrane regime (b). Both results were produced via evolution of the initial state for a BEC type membrane in units of mechanical frequency where Ω = 15.2 kHz, g0 = 32.8 Ω and J = π Ω. In (a) the membrane’s oscillation amplitude is directly proportional to the number of photons in the cavity N. (b) shows that by evolving the system in the transparent membrane regime the number of photons in each of the cavities can be interchanged.

Mentions: We plot the dynamics of the membrane under evolution of or in Fig. 3 in the case of an initial product state of the membrane and optical fields to clearly demonstrate the driving and flipping of the membrane’s motion.


Deterministic Creation of Macroscopic Cat States.

Lombardo D, Twamley J - Sci Rep (2015)

The dynamics of the MITM model in both the reflective membrane regime (a) and transparent membrane regime (b). Both results were produced via evolution of the initial state  for a BEC type membrane in units of mechanical frequency where Ω = 15.2 kHz, g0 = 32.8 Ω and J = π Ω. In (a) the membrane’s oscillation amplitude is directly proportional to the number of photons in the cavity N. (b) shows that by evolving the system in the transparent membrane regime the number of photons in each of the cavities can be interchanged.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4561959&req=5

f3: The dynamics of the MITM model in both the reflective membrane regime (a) and transparent membrane regime (b). Both results were produced via evolution of the initial state for a BEC type membrane in units of mechanical frequency where Ω = 15.2 kHz, g0 = 32.8 Ω and J = π Ω. In (a) the membrane’s oscillation amplitude is directly proportional to the number of photons in the cavity N. (b) shows that by evolving the system in the transparent membrane regime the number of photons in each of the cavities can be interchanged.
Mentions: We plot the dynamics of the membrane under evolution of or in Fig. 3 in the case of an initial product state of the membrane and optical fields to clearly demonstrate the driving and flipping of the membrane’s motion.

Bottom Line: Despite current technological advances, observing quantum mechanical effects outside of the nanoscopic realm is extremely challenging.In this work we develop a completely deterministic method of macroscopic quantum state creation.It is found that by using a Bose-Einstein condensate as a membrane high fidelity cat states with spatial separations of up to ∼300 nm can be achieved.

View Article: PubMed Central - PubMed

Affiliation: Centre for Engineered Quantum Systems, Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia.

ABSTRACT
Despite current technological advances, observing quantum mechanical effects outside of the nanoscopic realm is extremely challenging. For this reason, the observation of such effects on larger scale systems is currently one of the most attractive goals in quantum science. Many experimental protocols have been proposed for both the creation and observation of quantum states on macroscopic scales, in particular, in the field of optomechanics. The majority of these proposals, however, rely on performing measurements, making them probabilistic. In this work we develop a completely deterministic method of macroscopic quantum state creation. We study the prototypical optomechanical Membrane In The Middle model and show that by controlling the membrane's opacity, and through careful choice of the optical cavity initial state, we can deterministically create and grow the spatial extent of the membrane's position into a large cat state. It is found that by using a Bose-Einstein condensate as a membrane high fidelity cat states with spatial separations of up to ∼300 nm can be achieved.

No MeSH data available.


Related in: MedlinePlus