Optimized heralding schemes for single photons

Huang, Yu Ping; Altepeter, Joseph B.; Kumar, Prem

doi:10.1103/physreva.84.033844

Cited by 18 publications

(23 citation statements)

References 40 publications

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“…Hence, the heralded signal does not form a pure single-photon state. The easiest solution to cope with this problem is to apply heavy spectral and spatial filtering in the heralding arm [33,47,48]. This will eliminate all distinguishing features and project the heralded signal into a spectrally as well as spatially pure state.…”

Section: Pdc State Generationmentioning

confidence: 99%

“…However, they also possess some inherent drawbacks: First, the photon heralding is a statistical process and, hence, PDC always only approximates a deterministic single-photon source. Second, multi-photon-pair emission [28][29][30][31][32][33][34][35][36][37] limits the heralding rates and the fidelity of the generated single-photon states. Finally, the spectral properties of the source may lead to a heralding of single photons in a mixture of frequency modes, diminishing the purity of the heralded state.…”

Section: Introductionmentioning

confidence: 99%

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Limits on the deterministic creation of pure single-photon states using parametric down-conversion

Christ¹,

Silberhorn²

2012

Phys. Rev. A

116

120

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Parametric down-conversion (PDC) is one of the most widely used methods to create pure single-photon states for quantum information applications. However, little attention has been paid to higher-order photon components in the PDC process, yet these ultimately limit the prospects of generating single photons of high quality. In this paper we investigate the impact of higher-order photon components and multiple frequency modes on the heralding rates and single-photon fidelities. This enables us to determine the limits of PDC sources for single-photon generation. Our results show that a perfectly single-mode PDC source in conjunction with a photon-number-resolving detector is ultimately capable of creating single-photon Fock states with unit fidelity and a maximal state creation probability of 25%. Hence, an array of 17 switched sources is required to build a deterministic (>99% emission probability) pure single-photon source

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Section: Pdc State Generationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Limits on the deterministic creation of pure single-photon states using parametric down-conversion

Christ¹,

Silberhorn²

2012

Phys. Rev. A

116

120

View full text Add to dashboard Cite

show abstract

“…This purification can be achieved by spectrally filtering out the correlated parts of the joint signal-idler spectrum [13], or by sophisticated methods such as temporal-mode matched filtering [14] or mode-sensitive frequency conversion [15,16]. However, all of these methods share a common downside in that they result in additional photon losses and, consequently, lead to lower * jesbch@fotonik.dtu.dk single-photon rates.…”

Section: Introductionmentioning

confidence: 99%

Temporally uncorrelated photon-pair generation by dual-pump four-wave mixing

2016

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We study the preparation of heralded single-photon states using dual-pump spontaneous four-wave mixing. The dual-pump configuration, which in our case employs cross-polarized pumps, allows for a gradual variation of the nonlinear interaction strength enabled by a birefringence-induced walk-off between the pump pulses. The scheme enables the preparation of highly pure heralded single-photon states, and proves to be extremely robust against the effect of nonlinear phase modulation at the required photon-pair production rates.

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“…As we have previously demonstrated [14][15][16], entangled photons can be generated in single modes in any nonlinear medium as long as BT < 1, where B is the phase-matching bandwidth and T is the temporal width of the pump pulses. Intuitively, this is because with BT < 1, it is impossible, even in principle, to determine the exact temporal location of the generated photons within T , so that they must subtend a single coherent mode on the detection apparatus.…”

mentioning

confidence: 99%

Mode-resolved photon counting via cascaded quantum frequency conversion

Huang

Kumar

2013

Opt. Lett.

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Resources for the manipulation and measurements of high-dimensional photonic signals are crucial for implementing qudit-based applications. Here we propose potentially high-performance, chip-compatible devices for such purposes by exploiting quantum-frequency conversion in nonlinear optical media. Specifically, by using sum-frequency generation in a χ (2) waveguide we show how mode-resolved photon counting can be accomplished for telecom-band photonic signals subtending multiple temporal modes. Our method is generally applicable to any nonlinear medium with arbitrary dispersion property. c 2013 Optical Society of America OCIS codes: 190.4410, 270.5290 Photonic signals are widely employed in many modern applications such as secure key generation, quantum computation, and near Holevo-capacity telecommunications [1]. In these applications, photons occupying low-dimensional Hilbert spaces composed of polarization or spatial degrees of freedom are most commonly used. Recently, the use of high-dimensional photonic signals, known as qud its, has attracted attention as they can offer significant advantages over qubits in terms of higher channel capacity, better information security, and so on. There have been quite a few proposals for using photonic qudits in applications such as secure telecommunications [2] and super-dense coding [3].Crucial to implementing the aforementioned quditbased applications are the capabilities for manipulating and measuring high-dimensional photonic signals. Existing solutions have been based on serializing multiple, linear, two-port optical devices [4] or using lossy spatialmode modulators [5]. Their performance in practice, particularly in large-d systems, will be highly inefficient due to the need for complicated experimental setups with high concomitant transmission losses.In this Letter, we study a potentially high efficiency, low-loss approach for manipulating and measuring photonic signals in high-dimensional Hilbert spaces composed of polarization, spatial, and temporal degrees of freedom. It is built on quantum-frequency conversion (QFC), a coherent process that can translate the carrier frequency (wavelength) of photonic signals without disturbing their quantum states, including any correlation or entanglement with other quantum objects [6]. It is well known that QFC in nonlinear media is efficient only for those appropriate combinations of wavelengths, spatiotemporal modes, and polarizations of the interacting light waves for which phase matching (PM) occurs. Thus it is possible to engineer the conditions for PM such that only photons in desired modes are frequency converted with high efficiency, while those in other modes remain unaffected [7]. By detecting the frequency-converted signals with ordinary single-photon detectors, differences in the photons' mode-profile details, which are otherwise difficult to monitor, can be precisely measured. In addition, by using photon-numberresolving (PNR) detectors, mode-resolved photon counting (MRPC) can be accomplished, based on which...

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Optimized heralding schemes for single photons

Cited by 18 publications

References 40 publications

Limits on the deterministic creation of pure single-photon states using parametric down-conversion

Limits on the deterministic creation of pure single-photon states using parametric down-conversion

Temporally uncorrelated photon-pair generation by dual-pump four-wave mixing

Mode-resolved photon counting via cascaded quantum frequency conversion

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