Measurement-Induced State Transitions in a Superconducting Qubit: Within the Rotating Wave Approximation

Khezri, Mostafa; Opremcak, Alex; Chen, Zijun; Bengtsson, Andreas; White, Theodore C.; Naaman, Ofer; Acharya, Rajeev; Anderson, K. R.; Ansmann, M.; Arute, Frank; Arya, Kunal; Asfaw, Abraham; Bardin, Joseph C.; Bourassa, Alexandre; Bovaird, Jenna; Brill, Leon; Buckley, Bob B.; Buell, David A.; Burger, Tim; Burkett, Brian; Bushnell, Nicholas; Campero, Juan; Chiaro, B.; Collins, Roberto; Crook, Alexander L.; Curtin, Ben; Demura, Sean; Dunsworth, A.; Erickson, Catherine; Fatemi, Reza; Ferreira, Vinicius S.; Burgos, Leslie Flores; Forati, Ebrahim; Foxen, Brooks; Garcı́a, Gonzalo; Giang, W.; Giustina, Marissa; Gosula, Raja; Dau, Alejandro Grajales; Hamilton, Michael C.; Harrington, Sean D.; Heu, Paula; Hilton, Jeremy; Hoffmann, Markus R.; Hong, Sabrina; Huang, Trent; Huff, Ashley; Iveland, Justin; Jeffrey, E.; Kelly, J.; Kim, Seon; Klimov, Paul V.; Kostritsa, Fedor; Kreikebaum, John Mark; Landhuis, David; Laptev, Pavel; Laws, Lily; Lee, Kenneth; Lester, Brian; Lill, Alexander T.; Liu, Wayne; Locharla, Aditya; Lucero, Erik; Martin, Steven W.; McEwen, Matt; Megrant, A.; Xiao, Mei; Miao, Kevin C.; Montazeri, Shirin; Morvan, Alexis; Neeley, M.; Neill, Charles; Nersisyan, Ani; Ng, Jiun How; Nguyen, Anthony; Nguyen, Murray; Potter, Rebecca; Quintana, Chris; Rocque, Charles; Roushan, P.; Sankaragomathi, Kannan; Satzinger, Kevin J.; Schuster, Christopher; Shearn, Michael; Shorter, Aaron; Shvarts, Vladimir; Skruzny, Jindra; Smith, W. C.; Sterling, George; Szalay, Marco; Thor, Douglas; Torres, Alfredo G.; Woo, Bryan W. K.; Yao, Z. Jamie; Yeh, P.; Yoo, Juhwan; Young, Grayson; Zhu, Ningfeng; Zobrist, Nicholas; Sank, D.; Korotkov, Alexander N.; Chen, Yu; Smelyanskiy, Vadim

doi:10.48550/arxiv.2212.05097

Cited by 2 publications

(3 citation statements)

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“…Superconducting qubits, such as the transmon [1], are many-level systems in which a qubit is represented by the two lowest-energy states |g and |e . However, leakage to non-computational states is a risk for all quantum operations, including single-qubit gates [2], two-qubit gates [3][4][5] and measurement [6,7]. While the typical probability of leakage per operation may pale in comparison to conventional qubit errors induced by control errors and decoherence [5,8], unmitigated leakage can build up with increasing circuit depth.…”

Section: Introductionmentioning

confidence: 99%

All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits

Marques¹,

Ali²,

M.³

et al. 2023

Preprint

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Minimizing leakage from computational states is a challenge when using many-level systems like superconducting quantum circuits as qubits. We realize and extend the quantum-hardware-efficient, all-microwave leakage reduction unit (LRU) for transmons in a circuit QED architecture proposed by Battistel et al. This LRU effectively reduces leakage in the second-and third-excited transmon states with up to 99% efficacy in 220 ns, with minimum impact on the qubit subspace. As a first application in the context of quantum error correction, we demonstrate the ability of multiple simultaneous LRUs to reduce the error detection rate and to suppress leakage buildup within 1% in data and ancilla qubits over 50 cycles of a weight-2 parity measurement.

show abstract

Section: Introductionmentioning

confidence: 99%

All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits

Marques¹,

Ali²,

M.³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…We find that the remaining ancilla leakage is dominated by higher states above jfi (see Fig. S10 [42]) likely caused by the readout [6,7]. Given the observation leakage transfer between transmons, which can result in higher excited leakage states [34], data qubits can also potentially benefit from h-LRUs.…”

mentioning

confidence: 99%

“…Introduction.-Superconducting qubits, such as the transmon [1], are many-level systems in which a qubit is represented by the two lowest-energy states jgi and jei. However, leakage to noncomputational states is a risk for all quantum operations, including single-qubit gates [2], two-qubit gates [3][4][5], and measurement [6,7]. While the typical probability of leakage per operation may pale in comparison to conventional qubit errors induced by control errors and decoherence [5,8], unmitigated leakage can build up with increasing circuit depth.…”

mentioning

confidence: 99%

All-Microwave Leakage Reduction Units for Quantum Error Correction with Superconducting Transmon Qubits

Marques

Ali

et al. 2023

Phys. Rev. Lett.

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Measurement-Induced State Transitions in a Superconducting Qubit: Within the Rotating Wave Approximation

Cited by 2 publications

References 0 publications

All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits

All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits

All-Microwave Leakage Reduction Units for Quantum Error Correction with Superconducting Transmon Qubits

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