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Old 05-18-17, 01:19 AM   #221
yung23
made Damon Lindelof say "Fermions" on TV :P
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Re: What are your thoughts ? REAL WORLD MIND READING

once an entangled particle is observed, you know its state and it decoheres to that state.
the entanglement stops. but there are tricks, like the delayed choice quantum erasure

think about the dr quantum double slit video.

the interference pattern is entangled superpositions of the photon because it has not been observed.

but once you look to see what slit it goes through, you collapse the wavefunction.
it decoheres from superposition.

the zeno effect, seems to be the delayed choice erasure. I'm still trying to figure out these final details.
it always bugged me. I have a few posts here about how entanglement could be sustained. the zeno effect seems to have a big connection. its about Phase, which means homodyning works with it.


Quote:
Furthermore, we describe a measurement induced
quantum Zeno effect [12] for the entanglement, showing
that the quite simple procedure of monitoring the pop-
ulation of the cavity mode leads to a protection of the
entanglement well beyond its natural decay time
in our theory here.. this would be "photon counting" or homodyning/
as used in quantum repeaters.. which have to measure quantum states.




This has been the big measurement problem regarding wavefunctions and quantum states.
measuring the particle changes the state.
to see a photon, you have to bounce another off it, and that changes it.
but, if you know how you plan to measure it, you can somewhat determine that change, and thus, know the true undisturbed state.

seems just like weak measurement really.


to put this all laymenly..
mems are developed with a known quantum state.. so they know which way the states are being measured and they subtract the known state from the homodyned one.
but its more of a polarizing trick. you know the "angle" you are observing in.


kinda like you knowing your own weight, and you hold a big water balloon then weigh the total of you and the balloon.. then subtract your weight, so your left with the weight of the balloon. very lamenly put.

Once I go through it. I'll do a better laymening.
there was a good video explaining the zeno effect in the link above. a


it just screams "coherent states" to me.

the higher the amplitude the less noise becomes a factor in measuring.
seems just like the zeno effect and time.


and mems provide time domains.
something very useful here.

Quote:
The amount of quantum noise in the electric field is completely independent of the phase. As the field strength, i.e. the oscillation amplitude α of the coherent state is increased, the quantum noise or uncertainty is constant at 1/2, and so becomes less and less significant. In the limit of large field the state becomes a good approximation of a noiseless stable classical wave. The average photon numbers of the three states from bottom to top are <n>=4.2, 25.2, 924.5[5]
ETA.
okay, I'm seeing how this fits..
Remember, these DARPA repeaters/ biosensors use "squeezing"
ie Squeezed Light on Chip
AND, they provide optical cavities..

Quote:
Quantum Zeno dynamics in atoms and cavities - ScienceDirect

www.sciencedirect.com/science/article/pii/S1631070516300561
by S Gleyzes - ‎2016 - ‎Related articles
Jul 22, 2016 - Quantum Zeno Dynamics restricts the evolution of a system in a tailorable subspace of the Hilbert space by ... The coherent state 'collides' on the EC...


The QZD-induced phase inversion accelerates the ‘propagation’ in phase space. When the initial amplitude is such that the field state collides tangentially on the EC [Fig. 1(c)], the parts of the Wigner function that come closest to the EC propagate faster than others. The state is distorted and ends up squeezed.
Just like the ZENO EFFECTs repeated measurements..
is Continuous Homodyne detection
Its so fitting for Mems technology.

https://arxiv.org/abs/0709.4264


Quote:
We present a theoretical study of a superconducting charge qubit dispersively coupled to a transmission line resonator. Starting from a master equation description of this coupled system and using a polaron transformation, we obtain an exact effective master equation for the qubit. We then use quantum trajectory theory to investigate the measurement of the qubit by continuous homodyne measurement of the resonator out-field. Using the same porlaron transformation, a stochastic master equation for the conditional state of the qubit is obtained. From this result, various definitions of the measurement time are studied. Furthermore, we find that in the limit of strong homodyne measurement, typical quantum trajectories for the qubit exhibit a crossover from diffusive to jump-like behavior. Finally, in the presence of Rabi drive on the qubit, the qubit dynamics is shown to exhibit quantum Zeno behavior
and here it is being used with NV CENTERS... and PARITY PROJECTION..
http://iopscience.iop.org/article/10...30/18/1/013033

Quote:
Using the quantum Zeno effect for suppression of decoherence ...

by Y Kondo - ‎2016 - ‎Cited by 7 - ‎Related articles
Jan 13, 2016 - Using the quantum Zeno effect for suppression of decoherence ..... For example, in [25], they consider a single NV center, and a model similar to ours ..... with the first and second qubits, this provides us with a parity projection.
which seems to be important when coupling NV centers to cavities.. hence electromagnetic fields? and "MODE COUPLING"

Entanglement of separate nitrogen-vacancy centers coupled to a whispering-gallery mode cavity


http://iopscience.iop.org/article/10.1088/1367-2630/12/11/113039/meta;jsessionid=63C7BDBDEAD4551401A5E30C6A3F674C.c 5.iopscience.cld.iop.org


Mode Coupling


https://www.rp-photonics.com/mode_coupling.html

Quote:
Optical resonators (cavities) can exhibit various kinds of mode coupling phenomena. For example, aberrations of the thermal lens in the gain medium of a solid-state bulk laser couple the modes of the laser resonator, as calculated without these aberrations. In this situation, however, not all involved modes are necessarily resonant at the same time. This means then that the amplitude contribution which is fed e.g. from a fundamental (Gaussian) mode into a particular higher-order resonator mode in each resonator round trip will have a different phase each time. This nonresonant nature of the coupling means that the coupling will in general have a small effect – which is essential for laser operation with high beam quality, since otherwise aberrations would strongly excite higher-order modes, having a higher beam parameter product. Strong resonant coupling can occur in certain situations, involving frequency degeneracies of resonator modes. See Ref. [9] for more details.
so what does this mean ?
Is it the source of entanglement in teleportation where the wavefunction of atomic ensembles are mapped onto photons and coupled to the device for transmission via PHASE ?

http://www.nature.com/nphys/journal/...nphys2631.html
Quote:
Quantum teleportation is a key ingredient in quantum networks1, 2 and one of the building blocks for quantum computation3, 4. Teleportation between distant material objects using light as the quantum-information carrier has been a particularly exciting goal. Here we propose and demonstrate the deterministic continuous-variable teleportation between distant material objects. The objects are macroscopic atomic ensembles at room temperature. Entanglement required for teleportation is distributed by light propagating from one ensemble to the other. We demonstrate that the experimental fidelity of the quantum teleportation is higher than that achievable by any classical process. Furthermore, we demonstrate the benefits of deterministic teleportation by teleporting a sequence of spin states evolving in time from one distant object onto another. The teleportation protocol is applicable to other important systems, such as mechanical oscillators coupled to light or cold spin ensembles coupled to microwaves.
Do our neurons do the same using PHASE ?
is this how they communicate even when not overlapping ?
is this how we sustain coherence, entanglement, hence consciousness too ?


& the atomic ensembles.. are achieved be sub-cellular imaging..
Magnetic spin imaging under ambient conditions with sub-cellular resolution


https://www.nature.com/articles/ncomms2588

Quote:
The detection of small numbers of magnetic spins is a significant challenge in the life, physical and chemical sciences, especially when room temperature operation is required. Here we show that a proximal nitrogen-vacancy spin ensemble serves as a high precision sensing and imaging array. Monitoring its longitudinal relaxation enables sensing of freely diffusing, unperturbed magnetic ions and molecules in a microfluidic device without applying external magnetic fields. Multiplexed charge-coupled device acquisition and an optimized detection scheme permits direct spin noise imaging of magnetically labelled cellular structures under ambient conditions



which goes right back to DARPA.. and imaging the magnetic fields of firing Neurons

http://www.darpa.mil/news-events/2013-05-02
Quantum-assisted Nano-imaging of Living Organism Is a First

QuASAR program shrinks equipment and removes temperature constraints for high-resolution sensing and imaging at nano-scale



Quote:
Support future drug development by facilitating increased understanding of the structure of proteins.

Enable detailed, three-dimensional mapping of biological molecules, with sufficient sensitivity to identify specific elements. This information could streamline assessment of inhibitor drugs against naturally occurring and bioengineered viruses.

Enable measurement of the magnetic field of firing neurons.
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Last edited by yung23; Today at 02:03 PM. Reason: https://arxiv.org/abs/0709.4264
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