Low-power cross-phase modulation in a metastable xenon-filled cavity for quantum-information applications

Hickman, Garrett; Pittman, T. B.; Franson, J. D.

doi:10.1103/physreva.92.053808

Cited by 12 publications

(14 citation statements)

References 24 publications

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“…This proposal satisfies the conditions necessary to realize optical quantum computation using weak nonlinearities as proposed by Munro, et al [30], non-local interferometry as proposed by Kirby and Franson [31,32], and device-independent quantum key distribution [33]. It also supports some recent experimental efforts [34][35][36].…”

Section: Introductionsupporting

confidence: 81%

Cross-phase modulation enhancement via a resonating cavity: semiclassical description

Martínez-Rincón¹,

Howell²

2016

J. Opt. Soc. Am. B

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We evaluate the advantages of performing cross-phase modulation (XPM) on a very-far-off-resonance atomic system. We consider a ladder system with a weak (few-photon level) control coherent field imparting a conditional nonlinear phase shift on a probe beam. We find that by coupling to an optical resonator, the optimal XPM is enhanced proportional to the finesse of the resonator by a factor of F ∕4π. We present a semiclassical description of the system and show that the phenomenon is optimal in the self-defined condition of off-resonance effective cooperativity equal to one.

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Section: Introductionsupporting

confidence: 81%

Cross-phase modulation enhancement via a resonating cavity: semiclassical description

Martínez-Rincón¹,

Howell²

2016

J. Opt. Soc. Am. B

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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.…”

mentioning

confidence: 88%

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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“…There is also an argument that the locality of the AC-Stark shift effect causes phase noise and limits the total phase shift in some multimode systems [48,49]. This is not a problem for single mode systems, such as a cavity, where the whole cavity eigenmode is uniformly shifted [50]. In our proposed XPM scheme neither pulse is moving, and matching group velocities is not an issue.…”

Section: Resultsmentioning

confidence: 92%

Dynamical observations of self-stabilizing stationary light

Everett¹,

Campbell²,

Cho³

et al. 2016

Nature Phys

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Precise control of atom-light interactions is vital to many quantum information protocols. In particular, atomic systems can be used to slow and store light to form a quantum memory. Optical storage can be achieved via stopped light, where no optical energy remains in the atoms, or as stationary light, where some optical energy remains present during storage. In this work, we demonstrate a form of self-stabilising stationary light. From any initial state, our atom-light system evolves to a stable configuration that is devoid of coherent emission from the atoms, yet may contain bright optical excitation. This phenomenon is verified experimentally in a cloud of cold Rb87 atoms. The spinwave in our atomic cloud is imaged from the side allowing direct comparison with theoretical predictions.Coherent atom light interactions lie at the heart of many quantum information systems [1, 2]. In particular, implementations of quantum repeaters will likely rely on mapping of photonic states onto atomic systems to enable storage of quantum information [3,4]. Deterministic quantum logic gates in optical systems may also rely on atomic state mapping to enable nonlinear photon-photon interactions [5,6,7,8,9]. A fundamental issue facing any attempt to implement nonlinear cross phase modulation (XPM) is that the interaction is inherently very weak. Techniques are therefore required to increase the interaction time or interaction strength to allow useful amounts of phase shift. Interaction strength can be scaled up by choosing a nonlinear medium with strong optical interactions, such as Rydberg atoms [10,11]. A more general approach that works for any medium is to use smaller interaction volumes, since this increases the electric field per photon, and longer interaction times, which may be achieved by using an 1 arXiv:1609.08287v1 [quant-ph]

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Low-power cross-phase modulation in a metastable xenon-filled cavity for quantum-information applications

Cited by 12 publications

References 24 publications

Cross-phase modulation enhancement via a resonating cavity: semiclassical description

Cross-phase modulation enhancement via a resonating cavity: semiclassical description

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

Dynamical observations of self-stabilizing stationary light

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