Detecting an Itinerant Optical Photon Twice without Destroying It

Distante, Emanuele; Daiss, Severin; Langenfeld, Stefan; Hartung, Lukas; Thomas, Philip; Morin, Olivier; Rempe, Gerhard; Welte, Stephan

doi:10.1103/physrevlett.126.253603

Cited by 15 publications

(9 citation statements)

References 38 publications

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“…memories with single (Brekenfeld et al, 2020;Kalb et al, 2015;Specht et al, 2011) and several (Casabone et al, 2015;Langenfeld et al, 2020) atoms, photon-mediated quantum gates (Daiss et al, 2021;Dordevic et al, 2021;Hacker et al, 2016;Reiserer et al, 2014;Tiecke et al, 2014), nondestructive photon (Distante et al, 2021;Reiserer et al, 2013b) and photonic qubit (Niemietz et al, 2021) detection, and basic quantum repeater nodes (Langenfeld et al, 2021a). These advances have established trapped atoms as one of the leading experimental platforms for quantum networks.…”

Section: Atoms In Vacuummentioning

confidence: 99%

Cavity-enhanced quantum network nodes

Reiserer

2022

Preprint

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Section: Atoms In Vacuummentioning

confidence: 99%

Cavity-enhanced quantum network nodes

Reiserer

2022

Preprint

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“…While the theoretical model of quantum erasures is a very common one [24,26,41], recent experimental progress actually makes it feasible for the use in quantum communication. For example, non-destructive photon detectors [42,43] can be used to directly obtain all the erasure information; in principle, boosted teleportation schemes [44] should provide means to detect photons nondestructively with arbitrarily high success probabilities using linear optics and resource state generators alone. Alternatively, the necessary data may be obtained by storing the arriving photons in quantum memories in a heralding way [45][46][47][48], which may have benefits if the quantum information is to be manipulated in this form anyway.…”

Section: The "Reduced" Erasure Modelmentioning

confidence: 99%

Optimizing quantum codes with an application to the loss channel with partial erasure information

Desef

Plenio

2022

Quantum

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Quantum error correcting codes (QECCs) are the means of choice whenever quantum systems suffer errors, e.g., due to imperfect devices, environments, or faulty channels. By now, a plethora of families of codes is known, but there is no universal approach to finding new or optimal codes for a certain task and subject to specific experimental constraints. In particular, once found, a QECC is typically used in very diverse contexts, while its resilience against errors is captured in a single figure of merit, the distance of the code. This does not necessarily give rise to the most efficient protection possible given a certain known error or a particular application for which the code is employed.In this paper, we investigate the loss channel, which plays a key role in quantum communication, and in particular in quantum key distribution over long distances. We develop a numerical set of tools that allows to optimize an encoding specifically for recovering lost particles both deterministically and probabilistically, where some knowledge about what was lost is available, and demonstrate its capabilities. This allows us to arrive at new codes ideal for the distribution of entangled states in this particular setting, and also to investigate if encoding in qudits or allowing for non-deterministic correction proves advantageous compared to known QECCs. While we here focus on the case of losses, our methodology is applicable whenever the errors in a system can be characterized by a known linear map.

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“…The paradigmatic setup of waveguide QED is a two-level atom (qubit) coupled to the field propagating in a one-dimensional waveguide, the so-called one-dimensional (1D) atom. This system can be experimentally implemented in several state-of-the-art platforms of integrated photonics [ 14 ], superconducting circuits [ 15 , 16 ], and atomic physics [ 17 , 18 ]. A number of approaches to obtain the solution of this system have been considered and here we mention but a few important ones.…”

Section: Introductionmentioning

confidence: 99%

Closed-System Solution of the 1D Atom from Collision Model

Maffei

Camati

Auffèves

2022

Entropy

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Obtaining the total wavefunction evolution of interacting quantum systems provides access to important properties, such as entanglement, shedding light on fundamental aspects, e.g., quantum energetics and thermodynamics, and guiding towards possible application in the fields of quantum computation and communication. We consider a two-level atom (qubit) coupled to the continuum of travelling modes of a field confined in a one-dimensional chiral waveguide. Originally, we treated the light-matter ensemble as a closed, isolated system. We solve its dynamics using a collision model where individual temporal modes of the field locally interact with the qubit in a sequential fashion. This approach allows us to obtain the total wavefunction of the qubit-field system, at any time, when the field starts in a coherent or a single-photon state. Our method is general and can be applied to other initial field states.

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Detecting an Itinerant Optical Photon Twice without Destroying It

Cited by 15 publications

References 38 publications

Cavity-enhanced quantum network nodes

Cavity-enhanced quantum network nodes

Optimizing quantum codes with an application to the loss channel with partial erasure information

Closed-System Solution of the 1D Atom from Collision Model

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