निकटवर्ती क्वांटम फोटोनिक उपकरण पर त्रुटि शमन

समय टिकट: 4 मई, 2021 7:18 पूर्वाह्न
स्रोत नोड: 844782

Daiqin Su1, Robert Israel1, कुणाल शर्मा2, Haoyu Qi1, Ish Dhand1, and Kamil Brádler1

1Xanadu, टोरंटो, ओन्टेरियो, M5G 2C8, कनाडा
2Hearne इंस्टीट्यूट फॉर सैद्धांतिक भौतिकी और भौतिकी और खगोल विज्ञान विभाग, लुइसियाना स्टेट यूनिवर्सिटी, बैटन रूज, LA USA

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सार

Photon loss is destructive to the performance of quantum photonic devices and therefore suppressing the effects of photon loss is paramount to photonic quantum technologies. We present two schemes to mitigate the effects of photon loss for a Gaussian Boson Sampling device, in particular, to improve the estimation of the sampling probabilities. Instead of using error correction codes which are expensive in terms of their hardware resource overhead, our schemes require only a small amount of hardware modifications or even no modification. Our loss-suppression techniques rely either on collecting additional measurement data or on classical post-processing once the measurement data is obtained. We show that with a moderate cost of classical post processing, the effects of photon loss can be significantly suppressed for a certain amount of loss. The proposed schemes are thus a key enabler for applications of near-term photonic quantum devices.

Featured image: Mitigate the effect of photon loss for a two-mode squeezed vacuum state. Here $P([n, n])$ is the probability of detecting a photon number pattern $[n, n]$.

लोकप्रिय सारांश

The Gaussian boson sampling (GBS) device is one of the most promising quantum photonic devices. It has recently been used to demonstrate the quantum computational advantage over classical computers in a specific sampling problem. The GBS device may also find practical applications, e.g., in solving molecular docking problems, in the near future. However, the performance of the GBS device is dramatically degraded by photon loss. In principle, the photon loss can be corrected using quantum error-correcting codes, but these codes introduce a large resource overhead. This work proposes two schemes to mitigate the effect of photon loss for the near-term GBS device, with a small hardware modification or even no modification. The price to pay is to perform multiple experiments and classical post-processing. This work finds that the effect of photon loss can be significantly suppressed with a moderate amount of classical resources. Therefore, the proposed loss mitigation schemes are essential for near-term applications of quantum photonic technologies.

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द्वारा उद्धृत

[११] एम। सेरेज़ो, एंड्रयू अर्र्समिथ, रयान बाबुश, साइमन सी। बेंजामिन, सगुरू एंडो, कीसुके फ़ूजी, जारोद आर। मैकक्लेन, कोसुके मितराई, जिओ युआन, लतास सिनसियो, और पैट्रिक जे। कोल्स, "वैरिएंट क्वांटम एल्गोरिथम"। arXiv: 2012.09265.

[२] टायलर वोल्कॉफ, ज़ो होम्स, और एंड्रयू सोर्नबोर्गर, "यूनिवर्सल कंपाइलिंग एंड (नो-) फ्री-लंच थ्योरम्स फॉर कंटीन्यूअस वेरिएबल क्वांटम लर्निंग", arXiv: 2105.01049.

[3] Shreya P. Kumar, Leonhard Neuhaus, Lukas G. Helt, Haoyu Qi, Blair Morrison, Dylan H. Mahler, and Ish Dhand, “Mitigating linear optics imperfections via port allocation and compilation”, arXiv: 2103.03183.

[२] साद यलूज़, ब्रूनो सेनजेन, फिलिप्पो मिआटो, और वेदरन डोंजको, "एक फोटोनिक क्वांटम कंप्यूटर पर कई-बोसोन तरंगों को जोरदार रूप से सहसंबद्ध करते हुए, आकर्षक बोस-हबर्ड मॉडल के लिए": arXiv: 2103.15021.

उपरोक्त उद्धरण से हैं SAO / NASA ADS (अंतिम अद्यतन सफलतापूर्वक 2021-05-07 23:43:35)। सूची अधूरी हो सकती है क्योंकि सभी प्रकाशक उपयुक्त और पूर्ण उद्धरण डेटा प्रदान नहीं करते हैं।

On Crossref की उद्धृत सेवा द्वारा कार्यों का हवाला देते हुए कोई डेटा नहीं मिला (अंतिम प्रयास 2021-05-07 23:43:33)।

यह पत्र क्वांटम में प्रकाशित हुआ है क्रिएटिव कॉमन्स एट्रिब्यूशन 4.0 इंटरनेशनल (CC बाय 4.0) लाइसेंस। कॉपीराइट मूल कॉपीराइट धारकों जैसे लेखकों या उनकी संस्थाओं के पास रहता है।

स्रोत: https://quantum-journal.org/papers/q-2021-05-04-452/

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