Superposition, Entanglement, and Raising Schrödinger’s Cat (Nobel Lecture)

Wineland, David J.

doi:10.1002/anie.201303404

Cited by 28 publications

(22 citation statements)

References 156 publications

(142 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(Bottom row) Two-point correlation matrices obtained from the diagonal elements of (a), (c), (e), and (g), respectively. In the diagonals of (d) and (h) one can see that the bunching terms,G (3,3) , show the highest probability, while the antibunching terms,G To exemplify these effects, we explore the dynamics of separable i), entangled ii), classically correlated iii), and two distinguishable particles iv) as described in the previous section. Under such excitations, numerical integration of Eq.…”

Section: Two-particle Four-point Correlations In Dynamically Dismentioning

confidence: 99%

“…(4.g). However, this is not the case as indistinguishable particles exhibit very different correlation patterns where the bunching terms G (2) (1,1) = G (2) (2,2) = G (2) (3,3) are the highest ones, while the anti-bunching terms G (2) (1,2) = G (2) (1,3) = G (2) (2,3) appear to be the second highest probabilities, Fig. (4.d).…”

Section: Two-particle Four-point Correlations In Dynamically Dismentioning

confidence: 99%

“…Non-classical correlations among many particles or quantized fields are key elements to understand and ultimately apply the nonlocal properties of quantum systems [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-particle four-point correlations in dynamically disordered tight-binding networks

Pérez-Leija

León‐Montiel

Sperling

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

We use the concept of two-particle probability amplitude to derive the stochastic evolution equation for two-particle four-point correlations in tight-binding networks affected by diagonal dynamic disorder. It is predicted that in the presence of dynamic disorder, the average spatial wave function of indistinguishable particle pairs delocalizes and populates all network sites including those which are weakly coupled in the absence of disorder. Interestingly, our findings reveal that correlation elements accounting for particle indistinguishability are immune to the impact of dynamic disorder.

show abstract

Section: Two-particle Four-point Correlations In Dynamically Dismentioning

confidence: 99%

Section: Two-particle Four-point Correlations In Dynamically Dismentioning

confidence: 99%

See 1 more Smart Citation

Two-particle four-point correlations in dynamically disordered tight-binding networks

Pérez-Leija

León‐Montiel

Sperling

et al. 2017

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…For their pioneering work with trapped ions [7,8] and microwave photons [9,10], the Nobel prize in physics was awarded to David Wineland and Serge Haroche in 2012. Similar quantum control has meanwhile been achieved with neutral atoms [11,12], optical photons [13], single spins in quantum dots and other solid-state host materials [14][15][16], superconducting circuits [17,18], and even micro-mechanical oscillators [19].…”

Section: Atom-photon Interactionmentioning

confidence: 99%

A Controlled Phase Gate Between a Single Atom and an Optical Photon

Reiserer

2016

Springer Theses

View full text Add to dashboard Cite

SummaryThis thesis reports on the experimental implementation of a deterministic interaction mechanism between flying optical photons and a single trapped atom. To this end, single rubidium atoms are trapped in a three-dimensional optical lattice at the center of an optical cavity in the strong coupling regime. Full control over the atomic state -its position, its motion, and its electronic state -is achieved with laser beams applied along the resonator and from the side. When faint laser pulses are reflected from the resonator, the combined atom-photon state acquires a state-dependent phase shift. In a first series of experiments, this is employed to nondestructively detect optical photons by measuring the atomic state after the reflection process. In a second series of experiments, quantum bits are encoded in the polarization of the laser pulse and in the Zeeman state of the atom. The state-dependent phase shift then mediates a deterministic universal quantum gate between the atom and one or two successively reflected photons, which is used to generate entangled atom-photon, atom-photon-photon, and photon-photon states out of separable input states.3 4

show abstract

“…For example, double-slit interferometry has been recently scaled up to large molecules [5] and matter waves [6]. Similarly, the study of motional quantum states of trapped ions [7,8] has paved the way for similar experiments with trapped nanoparticles [9,10]. These last two examples technically fall under the umbrella of mechanical oscillators.…”

Section: Towards the Quantum Regimementioning

confidence: 99%

Quantum measurement and control of a mechanical parametric oscillator

Szorkovszky¹

View full text Add to dashboard Cite

Unlike classical systems, the very act of observing quantum systems perturbs their behaviour.This introduces "backaction noise", which imposes limits on the knowledge that can be obtained through measurement. Certain measurement techniques, known generally as quantum non-demolition (QND) measurements, exist to circumvent this noise. An alternative method to evade backaction noise is to amplify the observable of interest above the noise. However, this generally leaves the system in a different state, and is therefore not considered a QND measurement. In this thesis, I examine the benefits of amplification for various kinds of measurement of mechanical harmonic oscillators which, at the micrometre and nanometre scale, comprise an emerging quantum technology. For this prototypical case, modulation of the spring constant, also known as parametric amplification, is a well-studied noiseless amplification technique. Using the theory of trajectories developed in the field of quantum optics, I show that a weak measurement combined with a detuned parametric drive achieves the same ends as strong QND measurement. Namely, it allows backaction-free observation of one quadrature of mechanical motion, and through this, quantum squeezing below the quantum zero-point motion.This equivalence is experimentally confirmed in the classical limit using an optically detected, electrically modulated cantilever. In addition, I analyse similar amplification enhanced techniques for quantum entanglement and quantum tomography. These results are applicable to research in quantum optomechanics and electromechanics, and can be translated to other kinds of quantum harmonic oscillators, such as microwave cavities. Declaration by author

show abstract

Superposition, Entanglement, and Raising Schrödinger’s Cat (Nobel Lecture)

Abstract: ion traps · Nobel lecture · quantum clock · quantum computing · Schrçdinger's cat

Cited by 28 publications

References 156 publications

Two-particle four-point correlations in dynamically disordered tight-binding networks

Two-particle four-point correlations in dynamically disordered tight-binding networks

A Controlled Phase Gate Between a Single Atom and an Optical Photon

Quantum measurement and control of a mechanical parametric oscillator

Contact Info

Product

Resources

About