Measurement of sub-pulse-width temporal delays via spectral interference induced by weak value amplification

Salazar-Serrano, Luis José; Janner, Davide; Brunner, Nicolás; Pruneri, Valerio; Torres, Juan P.

doi:10.1103/physreva.89.012126

Cited by 56 publications

(50 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4(f)], while in other the reshaping of the spectrum translate into a measurable shift of the central frequency of the output power spectrum when compared with the central frequency of the input pulse [ Fig. 4(d) and (h)] [10,12,13].…”

Section: (D)mentioning

confidence: 99%

“…The interference is revealed as a reshaping of the input spectrum that is accomplished by introducing the polarization degree of freedom into a Michelson interferometer. This scenario corresponds precisely to the conditions of a typical weak value amplification configuration [5][6][7][8] that although was originally conceived in the framework of a quantum formalism, it is essentially based on the phenomena of interference and can thus be applied to any scenario with waves [9][10][11][12][13].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Observation of spectral interference for any path difference in an interferometer

Salazar-Serrano¹,

Valencia²,

Torres³

2014

Opt. Lett.

Self Cite

View full text Add to dashboard Cite

We report the experimental observation of spectral interference in a Michelson interferometer, regardless of the relationship between the temporal path difference introduced between the arms of the interferometer and the spectral width of the input pulse. This observation is possible by introducing the polarization degree of freedom into a Michelson interferometer using a typical weak value amplification scenario. c 2018 Optical Society of America OCIS codes: 260.0260, 260.3160,260.5430, 320.5550,120.3180 Interference is a fundamental concept in any theory based on waves, such as classical electromagnetism or quantum theory. The specific experimental arrangement required for the observation of interference depends on the characteristics of the light source, i.e., its spatiotemporal profile and its degree of coherence. For example, for first-order coherent light in a Michelson interferometer, for temporal delays shorter than the pulse width, interference manifests as a delay-dependent change of the intensity at the output port of the interferometer. For longer temporal delays, interference manifest as spectral interference for a given temporal delay. The observation of spectral interference was denoted by Mandel [1, 2] as the Alford-Gold effect [3] and it is well-known in optics [4].Here we report the observation of spectral interference independently of the temporal regime under consideration. The interference is revealed as a reshaping of the input spectrum that is accomplished by introducing the polarization degree of freedom into a Michelson interferometer. This scenario corresponds precisely to the conditions of a typical weak value amplification configuration [5][6][7][8] that although was originally conceived in the framework of a quantum formalism, it is essentially based on the phenomena of interference and can thus be applied to any scenario with waves [9][10][11][12][13].For the sake of clarity, let us start by describing temporal and spectral interference in a typical Michelson interferometer, without considering polarization. Later on, we will describe the effects that the introduction of the polarization degree of freedom has on spectral interference. Consider the situation depicted in Fig. 1(a). A first-order coherent input pulse with amplitude E 0 , central frequency ν 0 , input polarization e in , and temporal duration τ (full width at half maximum) described by follows a different path and after reflection in a mirror the two pulses recombine at the BS. By changing the position of one of the mirrors, a temporal delay (T ) is generated between the two pulses. The intensity measured by a slow detector at the output port of the interferometer as a function of T can be written aswhere I 0 = |E 0 | 2 . Two interesting cases can be distinguished: i) when T ≪ τ , and therefore, the two pulses traveling the different paths overlap in time and ii) when T ≫ τ and the two pulses do not overlap. In the first case, the output intensity as a function of T reduces to1

show abstract

Section: (D)mentioning

confidence: 99%

mentioning

confidence: 99%

Observation of spectral interference for any path difference in an interferometer

Salazar-Serrano¹,

Valencia²,

Torres³

2014

Opt. Lett.

Self Cite

View full text Add to dashboard Cite

show abstract

“…While the meaning of weak values has been debated since their inception [2][3][4][5], several experimental implementations of the weak measurement protocol have been carried out: weak values have thus been measured for different observables in many quantum systems [6][7][8][9][10][11][12][13]. Concurrently, theoretical schemes based on weak measurements have been proposed with practical [14][15][16] or foundational [17][18][19][20][21] aims.…”

Section: Introductionmentioning

confidence: 99%

The Quantum Cheshire Cat effect: Theoretical basis and observational implications

et al. 2018

View full text Add to dashboard Cite

The Quantum Cheshire Cat (QCC) is an effect introduced recently within the Weak Measurements framework. The main feature of the QCC effect is that a property of a quantum particle appears to be spatially separated from its position. The status of this effect has however remained unclear, as claims of experimental observation of the QCC have been disputed by strong criticism of the experimental as well as the theoretical aspects of the effect. In this paper we clarify in what precise sense the QCC can be regarded as an unambiguous consequence of the standard quantum mechanical formalism applied to describe quantum pointers weakly coupled to a system. In light of this clarification, the raised criticisms of the QCC effect are rebutted. We further point out that the limitations of the experiments performed to date imply that a loophole-free experimental demonstration of the QCC has not yet been achieved.

show abstract

“…The technique was initially proposed almost thirty years ago [3], and has been extensively studied and applied after the first successful implementation twenty years later [4]. The technique has been used to measure shifts of a laser frequency [5], linear velocities [6], optical phases [7,8], displacements due to the optical spin Hall effect [4,[9][10][11][12], temperature shifts [13,14], angular rotations of a laser beam [15], tilts of a mirror [16][17][18][19][20], polarization rotations [21], angular rotations of chiral molecules [22,23], and glucose concentration [24]. Advantages of WVA for metrology rely on practical aspects of anomalous amplification and low detected power.…”

Section: Introductionmentioning

confidence: 99%

Practical advantages of almost-balanced-weak-value metrological techniques

2017

View full text Add to dashboard Cite

Precision measurements of ultra-small linear velocities of one of the mirrors in a Michelson interferometer are performed using two different weak-values techniques. We show that the technique of Almost-Balanced Weak Values (ABWV) offers practical advantages over the technique of WeakValue Amplification (WVA), resulting in larger signal-to-noise ratios and the possibility of longer integration times due to robustness to slow drifts. As an example of the performance of the ABWV protocol we report a velocity sensitivity of 60 fm/s after 40 hours of integration time. The sensitivity of the Doppler shift due to the moving mirror is of 150 nHz.

show abstract

Measurement of sub-pulse-width temporal delays via spectral interference induced by weak value amplification

Cited by 56 publications

References 32 publications

Observation of spectral interference for any path difference in an interferometer

Observation of spectral interference for any path difference in an interferometer

The Quantum Cheshire Cat effect: Theoretical basis and observational implications

Practical advantages of almost-balanced-weak-value metrological techniques

Contact Info

Product

Resources

About