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Crystal Noel

Assistant Professor of Electrical and Computer Engineering
Electrical and Computer Engineering
701 W Main St, Chesterfield Building, Durham, NC 27701

Selected Publications


Experimental implementation of an efficient test of quantumness

Journal Article Physical Review A · January 1, 2024 A test of quantumness is a protocol where a classical user issues challenges to a quantum device to determine if it exhibits nonclassical behavior, under certain cryptographic assumptions. Recent attempts to implement such tests on current quantum computer ... Full text Cite

Interactive cryptographic proofs of quantumness using mid-circuit measurements

Journal Article Nature Physics · November 1, 2023 The ability to perform measurements in the middle of a quantum circuit is a powerful resource. It underlies a wide range of applications, from remote state preparation to quantum error correction. Here we apply mid-circuit measurements for a particular tas ... Full text Cite

Digital quantum simulation of NMR experiments.

Journal Article Science advances · November 2023 Simulations of nuclear magnetic resonance (NMR) experiments can be an important tool for extracting information about molecular structure and optimizing experimental protocols but are often intractable on classical computers for large molecules such as pro ... Full text Cite

Cross-platform comparison of arbitrary quantum states.

Journal Article Nature communications · November 2022 As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can be easily verifie ... Full text Cite

Measurement-induced quantum phases realized in a trapped-ion quantum computer

Journal Article Nature Physics · July 1, 2022 Many-body open quantum systems balance internal dynamics against decoherence and measurements induced by interactions with an environment1,2. Quantum circuits composed of random unitary gates with interspersed projective measurements represent a minimal mo ... Full text Open Access Cite

Control of Transverse Motion for Quantum Gates on Individually Addressed Atomic Qubits

Journal Article PRX Quantum · March 1, 2022 Individual trapped atomic qubits represent one of the most promising technologies to scale quantum computers, owing to their low idle errors and the ability to implement a full set of reconfigurable gate operations via focused optical fields. However, the ... Full text Cite

Optimizing Stabilizer Parities for Improved Logical Qubit Memories.

Journal Article Physical review letters · December 2021 We study variants of Shor's code that are adept at handling single-axis correlated idling errors, which are commonly observed in many quantum systems. By using the repetition code structure of the Shor's code basis states, we calculate the logical channel ... Full text Cite

Fault-tolerant control of an error-corrected qubit.

Journal Article Nature · October 2021 Quantum error correction protects fragile quantum information by encoding it into a larger quantum system1,2. These extra degrees of freedom enable the detection and correction of errors, but also increase the control complexity of the encoded l ... Full text Open Access Cite

Experimental implementation of an efficient test of quantumness

Journal Article Physical Review A · January 1, 2024 A test of quantumness is a protocol where a classical user issues challenges to a quantum device to determine if it exhibits nonclassical behavior, under certain cryptographic assumptions. Recent attempts to implement such tests on current quantum computer ... Full text Cite

Interactive cryptographic proofs of quantumness using mid-circuit measurements

Journal Article Nature Physics · November 1, 2023 The ability to perform measurements in the middle of a quantum circuit is a powerful resource. It underlies a wide range of applications, from remote state preparation to quantum error correction. Here we apply mid-circuit measurements for a particular tas ... Full text Cite

Digital quantum simulation of NMR experiments.

Journal Article Science advances · November 2023 Simulations of nuclear magnetic resonance (NMR) experiments can be an important tool for extracting information about molecular structure and optimizing experimental protocols but are often intractable on classical computers for large molecules such as pro ... Full text Cite

Cross-platform comparison of arbitrary quantum states.

Journal Article Nature communications · November 2022 As we approach the era of quantum advantage, when quantum computers (QCs) can outperform any classical computer on particular tasks, there remains the difficult challenge of how to validate their performance. While algorithmic success can be easily verifie ... Full text Cite

Measurement-induced quantum phases realized in a trapped-ion quantum computer

Journal Article Nature Physics · July 1, 2022 Many-body open quantum systems balance internal dynamics against decoherence and measurements induced by interactions with an environment1,2. Quantum circuits composed of random unitary gates with interspersed projective measurements represent a minimal mo ... Full text Open Access Cite

Control of Transverse Motion for Quantum Gates on Individually Addressed Atomic Qubits

Journal Article PRX Quantum · March 1, 2022 Individual trapped atomic qubits represent one of the most promising technologies to scale quantum computers, owing to their low idle errors and the ability to implement a full set of reconfigurable gate operations via focused optical fields. However, the ... Full text Cite

Optimizing Stabilizer Parities for Improved Logical Qubit Memories.

Journal Article Physical review letters · December 2021 We study variants of Shor's code that are adept at handling single-axis correlated idling errors, which are commonly observed in many quantum systems. By using the repetition code structure of the Shor's code basis states, we calculate the logical channel ... Full text Cite

Fault-tolerant control of an error-corrected qubit.

Journal Article Nature · October 2021 Quantum error correction protects fragile quantum information by encoding it into a larger quantum system1,2. These extra degrees of freedom enable the detection and correction of errors, but also increase the control complexity of the encoded l ... Full text Open Access Cite

Realization of Translational Symmetry in Trapped Cold Ion Rings.

Journal Article Physical review letters · February 2017 We crystallize up to 15 ^{40}Ca^{+} ions in a ring with a microfabricated silicon surface Paul trap. Delocalization of the Doppler laser-cooled ions shows that the translational symmetry of the ion ring is preserved at millikelvin temperatures. By characte ... Full text Cite

Surface traps for freely rotating ion ring crystals

Journal Article Journal of Physics B: Atomic, Molecular and Optical Physics · October 28, 2015 Full text Cite

Experimental violation of three families of Bell's inequalities

Journal Article Physical Review A · March 8, 2013 Full text Cite