Resolution of 100 photons and quantum generation of unbiased random numbers

Eaton, Miller; Hossameldin, Amr; Birrittella, Richard J.; Alsing, Paul M.; Gerry, Christopher C.; Dong, Hai; Cuevas, C.; Pfister, Olivier

doi:10.1038/s41566-022-01105-9

Cited by 48 publications

(30 citation statements)

References 43 publications

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“…. n k photons in k measurement modes by modern TES detectors resolution of which has been improved 37 . The measurement-induced CV states have a well-defined parity.…”

Section: Resultsmentioning

confidence: 99%

“…Second, we numerically demonstrate a possibility of generating even/ odd SCSs amplitudes β ≥ 5 with a fidelity exceeding > 0.99 (so-called perfect values) at the exit from the hub in the case of subtraction of 90, 91 photons from the initial SMSV by ideal PNR detectors. Third, we show advantage of using multiphoton state demultiplexing 37 resulting in a significant gain in the success probability of generating the SCSs on compared to the case of redirecting the multiphoton state into one PNR detector. In addition, the use of several PNR detectors reduces the requirements on maximum number of measurable photons detected with single-photon resolution.…”

Section: Algorithm Of Quantum Engineering Of Large-amplitude High-fid...mentioning

confidence: 90%

“…But the detection of photons diverted by such HTBS into the measuring mode becomes a fairly rare event even in the case of small values of the SCS amplitude β ≤ 2 . Undoubtedly, given the serious progress in PNR detection based on transition-edge sensor (TES) technology [33][34][35][36][37] , further modification of the photon subtraction technique could go in the direction of increase of number of subtracted photons 17,18,21,22,[29][30][31][32] , as well as using BS with arbitrary OPEN 1 Laboratory of Quantum Engineering of Light, South Ural State University (SUSU), Chelyabinsk, Russia. 2 Institute of Physics, Kazan Federal University (KFU), Kazan, Russia.…”

Section: Algorithm Of Quantum Engineering Of Large-amplitude High-fid...mentioning

confidence: 99%

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Algorithm of quantum engineering of large-amplitude high-fidelity Schrödinger cat states

Podoshvedov

Kulik

2023

Sci Rep

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We present an algorithm of quantum engineering of large-amplitude $$\ge 5$$ ≥ 5 high-fidelity $$\ge 0.99$$ ≥ 0.99 even/odd Schrödinger cat states (SCSs) using a single mode squeezed vacuum (SMSV) state as resource. Set of $$k$$ k beam splitters (BSs) with arbitrary transmittance and reflectance coefficients sequentially following each other acts as a hub that redirects a multiphoton state into the measuring modes simultaneously measured by photon number resolving (PNR) detectors. We show that the multiphoton state splitting guarantees significant increase of the success probability of the SCSs generator compared to its implementation in a single PNR detector version and imposes less requirements on ideal PNR detectors. We prove that the fidelity of the output SCSs and its success probability are in conflict with each other (which can be quantified) in a scheme with ineffective PNR detectors, especially when subtracting large (say, $$100$$ 100 ) number of photons, i.e., increasing the fidelity to perfect values leads to a sharp decrease in the success probability. In general, the strategy of subtracting up to $$20$$ 20 photons from initial SMSV in setup with two BSs is acceptable for achieving sufficiently high values of the fidelity and success probability at the output of the generator of the SCSs of amplitude $$\le 3$$ ≤ 3 with two inefficient PNR detectors.

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“…. n k photons in k measurement modes by modern TES detectors resolution of which has been improved 37 . The measurement-induced CV states have a well-defined parity.…”

Section: Resultsmentioning

confidence: 99%

Section: Algorithm Of Quantum Engineering Of Large-amplitude High-fid...mentioning

confidence: 90%

Section: Algorithm Of Quantum Engineering Of Large-amplitude High-fid...mentioning

confidence: 99%

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Algorithm of quantum engineering of large-amplitude high-fidelity Schrödinger cat states

Podoshvedov

Kulik

2023

Sci Rep

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“…and thus allows to increase the probability of success of the protocol despite the non-orthogonality of the state. Experimentally, the choice of the PNR detector could be the one described in [62]. Reaching a 3/4 probability of success has also been found by using non-linear process or ancilla entangled states [63,64].…”

Section: Teleportation-based Error Correction Of Time-frequency Qubit...mentioning

confidence: 99%

Teleportation-based error correction protocol of time-frequency qubits states

Fabre¹

2023

Preprint

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We present a linear optical protocol for teleporting and correcting both temporal and frequency errors in two time-frequency qubit states. The first state is the frequency (or time-of-arrival) cat qubit, which is a single photon in a superposition of two frequencies (or time-of-arrival), while the second is the time-frequency Gottesman-Kitaev-Preskill (GKP) state, which is a single photon with a frequency comb structure. The proposed optical scheme could be valuable for reducing error rate in quantum communication protocols involving one of these qubits.

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“…The latter have come of age in superconducting devices such as transition edge sensors [13] and superconducting nanowire single-photon detectors [14]. Both the former and the latter have recently been used to make PNR measurements of as many as 100 photons [15,16].…”

Section: A Gaussian Boson Samplingmentioning

confidence: 99%

Sample efficient graph classification using binary Gaussian boson sampling

Anteneh¹,

Pfister²

2023

Preprint

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We present a variation of a quantum algorithm for the machine learning task of classification with graph-structured data. The algorithm implements a feature extraction strategy that is based on Gaussian boson sampling (GBS) a near term model of quantum computing. However, unlike the currently proposed algorithms for this problem, our GBS setup only requires binary (light/no light) detectors, as opposed to photon number resolving detectors. These detectors are technologically simpler and can operate at room temperature, making our algorithm less complex and less costly to implement on the physical hardware. We also investigate the connection between graph theory and the matrix function called the Torontonian which characterizes the probabilities of binary GBS detection events.

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Resolution of 100 photons and quantum generation of unbiased random numbers

Cited by 48 publications

References 43 publications

Algorithm of quantum engineering of large-amplitude high-fidelity Schrödinger cat states

Algorithm of quantum engineering of large-amplitude high-fidelity Schrödinger cat states

Teleportation-based error correction protocol of time-frequency qubits states

Sample efficient graph classification using binary Gaussian boson sampling

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