Single-Photon Distillation via a Photonic Parity Measurement Using Cavity QED

Daiss, Severin; Welte, Stephan; Hacker, Bastian; Li, L.; Rempe, Gerhard

doi:10.1103/physrevlett.122.133603

Cited by 25 publications

(15 citation statements)

References 38 publications

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“…4: not operating the detector (blue), operating the detector in single-shot mode to create even (red) and odd cat states (black), and not distinguishing the parity detector states and thus creating a statistical mixture of cat states (orange symbols). We observe a continuous transition: in the low power regime the odd cat state is anti-bunched, g (2) (0) ∼ 0.2, as it is composed predominantly of the single photon Fock state [33], and the even cat state is strongly bunched, g (2) (0) ∼ 8, as it consists mostly of vacuum and 2-photon components. Both the coherent state and the mixture obey poissonian statistics with g (2) (0) ∼ 1.…”

Section: Heralding Of Cat States By Parity Detectionmentioning

confidence: 93%

Parity Detection of Propagating Microwave Fields

et al. 2020

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The parity of the number of elementary excitations present in a quantum system provides important insights into its physical properties. Parity measurements are used, for example, to tomographically reconstruct quantum states or to determine if a decay of an excitation has occurred, information which can be used for quantum error correction in computation or communication protocols. Here we demonstrate a versatile parity detector for propagating microwaves, which distinguishes between radiation fields containing an even or odd number n of photons, both in a single-shot measurement and without perturbing the parity of the detected field. We showcase applications of the detector for direct Wigner tomography of propagating microwaves and heralded generation of Schrödinger cat states. This parity detection scheme is applicable over a broad frequency range and may prove useful, for example, for heralded or fault-tolerant quantum communication protocols. * jbesse@phys.ethz.ch † Current address: Quantum Technology Laboratory, Chalmers University of Technology, SE-412 96 Gteborg, Sweden qubits for measurement based entanglement generation [13], for elements of error correction [14][15][16], and entanglement stabilization [17], an experiment which was also performed with ions [18,19].

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Section: Heralding Of Cat States By Parity Detectionmentioning

confidence: 93%

Parity Detection of Propagating Microwave Fields

et al. 2020

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“…An advantage of our protocol is that the underlying photon-reflection mechanism is robust with respect to the temporal shape of the employed photon as was demonstrated in Ref. [21]. This makes our scheme easy to implement in comparison to the conventionally employed overlapping of two identical photons on a beam splitter [6,9,11,22].…”

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confidence: 86%

Quantum Teleportation between Remote Qubit Memories with Only a Single Photon as a Resource

et al. 2021

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Quantum teleportation enables the deterministic exchange of qubits via lossy channels. While it is commonly believed that unconditional teleportation requires a preshared entangled qubit pair, here we demonstrate a protocol that is in principle unconditional and requires only a single photon as an ex-ante prepared resource. The photon successively interacts, first, with the receiver and then with the sender qubit memory. Its detection, followed by classical communication, heralds a successful teleportation. We teleport six mutually unbiased qubit states with average fidelity F = (88.3 ± 1.3)% at a rate of 6 Hz over 60 m.

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“…In this section we study the evolution of the Mandel Q parameter, the cavity number variance Δn 2 , and the generalized quadrature variance ΔX 2 θ of the intracavity field â, for a coupled vibration-cavity system with a photon frequency modulated according to equation (2). The ultrastrong coupling regime is assumed (λ g > 0.1) for a system initialized in the ground state |Ψ G or the lower polariton state |Ψ LP prior to the modulation pulse.…”

Section: Cavity Frequency Modulation In Ultrastrong Couplingmentioning

confidence: 99%

Ultrafast modulation of vibrational polaritons for controlling the quantum field statistics at mid-infrared frequencies

Triana

Herrera

2022

New J. Phys.

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Controlling the quantum field statistics of confined light is a long-standing goal in integrated photonics. We show that by coupling molecular vibrations with a confined mid-infrared cavity vacuum, the photocount and quadrature field statistics of the cavity field can be reversibly manipulated over sub-picosecond timescales. The mechanism involves changing the cavity resonance frequency through a modulation of the dielectric response of the cavity materials using femtosecond UV pulses. For a single anharmonic molecular vibration in an infrared cavity under ultrastrong coupling conditions, the pulsed modulation of the cavity frequency can adiabatically produce mid- infrared light that is simultaneously sub-Poissonian and quadrature squeezed, depending on the dipolar behavior of the vibrational mode. For a vibration-cavity system in strong coupling, non-adiabatic polariton excitations can be produced after the frequency modulation pulse is over, when the system is initially prepared in the lower polariton state. We propose design principles for the generation of mid-infrared quantum light by analyzing the dependence of the cavity field statistics on the shape of the electric dipole function of the molecule, the cavity detuning at the modulation peak and the anharmonicity of the Morse potential. Feasible experimental implementations of the modulation scheme are suggested. This work paves the way for the development of molecule-based mid-infrared quantum optical devices at room temperature.

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Single-Photon Distillation via a Photonic Parity Measurement Using Cavity QED

Cited by 25 publications

References 38 publications

Parity Detection of Propagating Microwave Fields

Parity Detection of Propagating Microwave Fields

Quantum Teleportation between Remote Qubit Memories with Only a Single Photon as a Resource

Ultrafast modulation of vibrational polaritons for controlling the quantum field statistics at mid-infrared frequencies

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