Observation of the Nonlinear Phase Shift Due to Single Post-Selected Photons

Feizpour, Amir; Hallaji, Matin; Dmochowski, Greg; Steinberg, Aephraim M.

doi:10.1364/cleo_qels.2015.fm1e.2

Cited by 10 publications

(15 citation statements)

References 6 publications

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“…These investigations are part of the general drive of using atomic ensembles to mediate strong photon–photon interactions1213, for example, via strong long-range dipole–dipole interaction between Rydberg atoms14 or via the a.c. Stark shift1516. Experimental realizations of photon–photon interaction using Rydberg states17181920, and the a.c. Stark shift212223242526 have furthermore enabled applications such as all-optical switching27282930. Finally, we note that non-destructive detection has been achieved for microwave photons inside cavities using superconducting circuits31 and Rydberg atoms323334.…”

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confidence: 89%

Proposal and proof-of-principle demonstration of non-destructive detection of photonic qubits using a Tm:LiNbO3 waveguide

et al. 2016

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Non-destructive detection of photonic qubits is an enabling technology for quantum information processing and quantum communication. For practical applications, such as quantum repeaters and networks, it is desirable to implement such detection in a way that allows some form of multiplexing as well as easy integration with other components such as solid-state quantum memories. Here, we propose an approach to non-destructive photonic qubit detection that promises to have all the mentioned features. Mediated by an impurity-doped crystal, a signal photon in an arbitrary time-bin qubit state modulates the phase of an intense probe pulse that is stored during the interaction. Using a thulium-doped waveguide in LiNbO3, we perform a proof-of-principle experiment with macroscopic signal pulses, demonstrating the expected cross-phase modulation as well as the ability to preserve the coherence between temporal modes. Our findings open the path to a new key component of quantum photonics based on rare-earth-ion-doped crystals.

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confidence: 89%

Proposal and proof-of-principle demonstration of non-destructive detection of photonic qubits using a Tm:LiNbO3 waveguide

et al. 2016

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“…One interesting example is that of stationary light, where two counter-propagating control fields are used to stop the propagation of an EIT polariton even though a portion of the excitation remains optical [16,17,18,19,20,21]. The optical part can be used to generate a nonlinear interaction, necessary for optical quantum gates [22,23,24,25].…”

Section: Introductionmentioning

confidence: 99%

Direct imaging of slow, stored and stationary EIT polaritons

Campbell

Cho

et al. 2017

Quantum Sci. Technol.

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Stationary and slow light effects are of great interest for quantum information applications. Using laser-cooled Rb87 atoms we have performed side imaging of our atomic ensemble under slow and stationary light conditions, which allows direct comparison with numerical models. The polaritions were generated using electromagnetically induced transparency (EIT), with stationary light generated using counter-propagating control fields. By controlling the power ratio of the two control fields we show fine control of the group velocity of the stationary light. We also compare the dynamics of stationary light using monochromatic and bichromatic control fields. Our results show negligible difference between the two situations, in contrast to previous work in EIT based systems. arXiv:1706.08208v1 [quant-ph]

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“…where n now refers to the photon number in the probe, Ĉ is the photon number in the system, and gS ( g) is the coupling due to the SPM (XPM). Integrating along the fiber yields the coefficient g S (g) for the SPM (XPM), such that the evolution is given by U = e −ig S n2 −ig Ĉ n. The XPM represents an interaction involving a single photon, and thus, measuring g is highly important for many applications [32,33]. An experiment to achieve this was recently performed by Matsuda et al [25], using the standard approach as described above.…”

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confidence: 99%

Heisenberg-scaling measurement of the single-photon Kerr non-linearity using mixed states

Chen¹,

Aharon²,

Sun³

et al. 2018

Nat Commun

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Improving the precision of measurements is a significant scientific challenge. Previous works suggest that in a photon-coupling scenario the quantum fisher information shows a quantum-enhanced scaling of N2, which in theory allows a better-than-classical scaling in practical measurements. In this work, utilizing mixed states with a large uncertainty and a post-selection of an additional pure system, we present a scheme to extract this amount of quantum fisher information and experimentally attain a practical Heisenberg scaling. We performed a measurement of a single-photon’s Kerr non-linearity with a Heisenberg scaling, where an ultra-small Kerr phase of ≃6 × 10−8 rad was observed with a precision of ≃3.6 × 10−10 rad. From the use of mixed states, the upper bound of quantum fisher information is improved to 2N2. Moreover, by using an imaginary weak-value the scheme is robust to noise originating from the self-phase modulation.

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Observation of the Nonlinear Phase Shift Due to Single Post-Selected Photons

Cited by 10 publications

References 6 publications

Proposal and proof-of-principle demonstration of non-destructive detection of photonic qubits using a Tm:LiNbO3 waveguide

Proposal and proof-of-principle demonstration of non-destructive detection of photonic qubits using a Tm:LiNbO3 waveguide

Direct imaging of slow, stored and stationary EIT polaritons

Heisenberg-scaling measurement of the single-photon Kerr non-linearity using mixed states

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