Phase-unlocked Hong-Ou-Mandel interferometry

Abouraddy, Ayman F.; Yarnall, Timothy M.; Giuseppe, Giovanni Di

doi:10.1103/physreva.87.062106

Cited by 17 publications

(28 citation statements)

References 28 publications

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“…We now analyze the discreteness of the frequency entanglement by the ratio of the center wavelength difference between two photons to the bandwidth of single photons. In fact, the spectral properties of a single photon can be extracted from the HOM fringes width because we used single mode cw pumped SPDC process [20,21]. From the fitting parameter in Eq.…”

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confidence: 99%

Highly efficient source for frequency-entangled photon pairs generated in a 3^rd-order periodically poled MgO-doped stoichiometric LiTaO_3 crystal

Kim

Lee

et al. 2015

Opt. Lett.

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Received Month X, XXXX; revised Month X, XXXX; accepted Month X, XXXX;posted Month X, XXXX (Doc. ID XXXXX); published Month X, XXXXWe present a highly efficient source for discrete frequency-entangled photon pairs based on spontaneous parametric downconversion using 3 rd order type-0 quasi-phase matching in a periodically poled MgO-doped stoichiometric LiTaO3 crystal pumped by a 355.66 nm laser. Correlated two-photon states were generated with automatic conservation of energy and momentum in two given spatial modes. These states have a wide spectral range, even under small variations in crystal temperature, which consequently results in higher discreteness. Frequency entanglement was confirmed by measuring twophoton quantum interference fringes without any spectral filtering.Entangled photon pairs are a very important resource in the field of quantum information science. Over the last three decades, various types of entangled photon-pair sources have been developed not only to study the foundation of quantum mechanics but also to implement real world quantum technologies [1,2]. Among them, polarization-entangled pairs of photons have been adopted as the most versatile light source because their polarization has a well-defined orthogonal basis, and which can be easily manipulated using only linear optics [3,4]. In combination with the polarization degree of freedom, the frequency (or wavelength) of a single photon can also be employed as a basic unit to prepare a quantum state [5][6][7][8][9][10]. Particularly, generation and manipulation of the multi-dimensional quantum states by utilizing frequency degree of freedom is one of the interesting issues for potential applications in practical quantum communication system [11][12][13][14]. To utilize the frequency degree of freedom as a quantum information resource, it is necessary to separate the center frequencies of the two photons over a range substantially larger than the spectral bandwidth of the two individual photons.Recently, certain types of photonic sources for discrete frequency-entangled states using correlated photon pairs were reported and used to explore the potential applications in quantum information and communication technologies. In the first experimental demonstration, Ramelow and co-workers reported a discrete tunable frequency-entangled photon-pair source generated by spontaneous parametric down-conversion (SPDC) using type-II collinear quasi-phase matching (QPM) in a periodically poled KTiOPO4 (PPKTP) crystal inside a polarization Sagnac interferometer [5,6]. To successfully obtain frequency symmetric states in the two spatial modes, they used a method of transferring the polarization entanglement onto a frequency-entangled state. Further work was performed using optical fibers, such as a dispersion shifted fiber [7,8] and a commercial polarization-maintaining fiber [9], to generate frequencyentangled photon-pair states via spontaneous four-wave mixing (SFWM). Occasionally, fiber sources have inevitably required cumbersome cooling systems to ...

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confidence: 99%

Highly efficient source for frequency-entangled photon pairs generated in a 3^rd-order periodically poled MgO-doped stoichiometric LiTaO_3 crystal

Kim

Lee

et al. 2015

Opt. Lett.

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“…For four-slit scheme this effect is found to have a rather peculiar form, with many oscillations of the coincidence probability in dependence on the delay time in one of two channels and with formation of finite-size temporal-comb structures. Various aspects of similar analyzes were considered in a series of works [8][9][10][11][12][13][14][15][16][17]. Whenever it's reasonable, the results of the present work will be compared with those obtained earlier by us or other authors.…”

Section: Spontaneous Parametric Down-conversion (Spdc)mentioning

confidence: 95%

“…10 remind to some extent the curves of Fig. 4 of the work [12] though there are big differences both in the problem formulation and in the meaning of curves. In our formulation the pictures of Fig.…”

Section: Hong-ou-mandel Effect In the Case Of Frequency-nondegeneratementioning

confidence: 99%

“…4 of [12] characterize the expected coincidence signal between photons coming from two different beamsplitters. Resemblance of our results with those of [12] occurring in spite of these differences is rather interesting and it emphasizes universality of the underlying interference phenomenon which shows up itself in similar ways at rather pronouncedly different conditions. Moreover, probably it can be said that to some extent the dual-delay scheme with two slits imitates the situation occurring in the scheme with four slits.…”

Section: Hong-ou-mandel Effect In the Case Of Frequency-nondegeneratementioning

confidence: 99%

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Temporal interference effects in noncollinear and frequency-nondegenerate spontaneous parametric down-conversion

et al. 2018

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We consider regimes of Spontaneous Parametric Down-Conversion both noncollinear and nondegenerate in frequencies.Parameters characterizing degrees of noncollinearity and of nondgeneracy are defined, and they are shown to be not independent of each other. At a given degree of nondegeneracy the emitted photons are shown to propagate along two different cones opening angles of which are determined by the degree of nondegeneracy. Based on this, the degree of nondegeneracy can be controlled by means of the angular selection of photons, e.g., with the help of appropriately installed slits. For such selected photons their wave functions are found depending on two frequency or on two temporal variables. Interference effects arising in such states are tested by analyzes of the Hong-Ou-Mandel type scheme with the varying delay time in one of two channels and with photons from two channels sent to the beamsplitter. The temporal pictures arising after the beamsplitter are found to demonstrate extremely strong interference exhibiting itself in formation of finite-size temporal combs filled with quantum beats. Parameters of combs depend on the degree of nondegeneracy, and the physical reasons of this dependence are clarified.

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“…Such interferometers can be realized using the well-known two-photon Hong-Ou-Mandel (HOM) interference, which was demonstrated in several systems [11][12][13][14][15][16][17].…”

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Modified two-photon interference achieved by the manipulation of entanglement

et al. 2017

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In this theoretical study we demonstrate that entangled states are able to significantly extend the functionality of Hong-Ou-Mandel (HOM) interferometers. By generating a coherent superposition of parametric-down-conversion photons and spatial entanglement in the input channel, the coincidence probability measured at the output changes from a typical HOM-type dip (photon bunching) into much richer patterns including an anti-bunching peak and rapid oscillation fringes with twice the optical frequency. The considered system should be realizable on a single chip using current waveguide technology in the LiN bO3 platform. [4][5][6], and quantum algorithms [7,8]. The highly attractive hyperentangled states extend possibilities of quantum technologies, allowing new quantum communication protocols, superdense teleportation [10], and objects with higher dimensionality [9]. Therefore the generation and application of photon states with a high degree of entanglement and hyperentangled states is an intensely studied topic in quantum optics.An important element in a computational infrastructure based on photons are quantum interferometers which allow to measure the degree of indistinguishability of photons. Such interferometers can be realized using the well-known two-photon Hong-Ou-Mandel (HOM) interference, which was demonstrated in several systems [11][12][13][14][15][16][17].For practical large-scale applications in quantum information processing free-space set-ups are not very reliable because of the experimental complexity that is required to achieve and maintain a precise and stable adjustment between the elements and due to the significant size of such systems. However, due to their small size and high stability integrated quantum optical systems [18] are very promising in this direction. Furthermore, they provide an attractive platform for the realization of a wide range of functionalities including quantum simulations [19,20], boson sampling [21-23], quantum computation, and quantum communication processing [24].In this paper, we propose and analyze a device which can be realized on a single integrated platform and is able to manipulate the two-photon coincidence probability by interference and to create hyperentanglement. The photon pair generation is incorporated into the system using an on-chip parametric-down-conversion (PDC) [25][26][27][28] source. We theoretically show that the creation of spatially-entangled photons in a singlet Bell state is possible in such a device and that the entanglement leads to novel features in the coincidence probability. In particular, different regimes of bunching (HOM-type dips) and anti-bunching (singlet Bell state) and rapid interference fringes corresponding to twice the optical frequency are predicted. Simultaneously, frequency correlations are preserved in the system which leads to the creation a hyperentanglement, see Fig. 1. FIG. 1. Two photons generated in a PDC process have frequency correlations. The creation of spatial entanglement between the photons leads to a hy...

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Phase-unlocked Hong-Ou-Mandel interferometry

Cited by 17 publications

References 28 publications

Highly efficient source for frequency-entangled photon pairs generated in a 3^rd-order periodically poled MgO-doped stoichiometric LiTaO_3 crystal

Highly efficient source for frequency-entangled photon pairs generated in a 3^rd-order periodically poled MgO-doped stoichiometric LiTaO_3 crystal

Temporal interference effects in noncollinear and frequency-nondegenerate spontaneous parametric down-conversion

Modified two-photon interference achieved by the manipulation of entanglement

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