Article
Quantum Science & Technology
Wen-Qiang Liu, Hai-Rui Wei, Leong-Chuan Kwek
Summary: Universal quantum entangling gates are crucial for large-scale quantum computation and communication, and this paper presents a simple and effective quantum circuit for their implementation. It also demonstrates the design of polarization CNOT and Toffoli gates using linear optics.
ADVANCED QUANTUM TECHNOLOGIES
(2022)
Article
Optics
Adenilton J. da Silva, Daniel K. Park
Summary: The paper presents a systematic procedure for decomposing multiqubit controlled unitary gates into controlled -NOT and single-qubit gates to minimize quantum circuit depth. The algorithm does not require ancillary qubits and achieves a quadratic reduction in circuit depth compared to known methods.
Article
Quantum Science & Technology
Iivari Pietikainen, Ondrej Cernotik, Shruti Puri, Radim Filip, S. M. Girvin
Summary: In hybrid circuit quantum electrodynamics, a controlled beam splitter gate is a powerful resource for creating ancilla-controlled SWAP gates, executing swap tests, preparing quantum non-Gaussian entanglement, and measuring nonlinear functionals of quantum states. A new realization of a hybrid cSWAP using "Kerr-cat" qubits offers important benefits for quantum computation.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Physics, Applied
Dongmin Yu, Han Wang, Jin-Ming Liu, Shi-Lei Su, Jing Qian, Weiping Zhang
Summary: This paper demonstrates a method for implementing a multiqubit blockade gate using atoms arranged in a three-dimensional spheroidal array. By optimizing the control qubit distributions, an enhanced asymmetric Rydberg blockade is achieved, with robustness and negligible position error. Numerical calculations show that high-fidelity multiqubit quantum computation can be achieved.
PHYSICAL REVIEW APPLIED
(2022)
Article
Computer Science, Hardware & Architecture
Sergey Bravyi, Theodore J. Yoder, Dmitri Maslov
Summary: The Hidden Weighted Bit function is significant in classical models of computation. It is believed to be exponentially difficult to implement using reversible ancilla-free circuits, but a small number of ancillae can greatly improve the efficiency. This paper refutes the exponential hardness conjecture by developing a polynomial-size reversible ancilla-free circuit and a quantum ancilla-free circuit for computing the Hidden Weighted Bit function, using techniques from Theoretical Computer Science and Physics.
IEEE TRANSACTIONS ON COMPUTERS
(2022)
Article
Quantum Science & Technology
Sven Jandura, Jeff D. Thompson, Guido Pupillo
Summary: Researchers introduced a new gate sequence that is robust against intensity inhomogeneity and Doppler shifts, reducing the sensitivity of gate operations in neutral-atom qubits to experimental imperfections. The gates outperform existing ones for moderate or large imperfections, and show improved performance even for very small imperfections when applied to erasure-biased qubits based on metastable 171Yb.
Article
Quantum Science & Technology
Sven Jandura, Guido Pupillo
Summary: In this study, we identify time-optimal laser pulses for implementing the controlled-Z gate and its generalization, the C(2)Z gate, for Rydberg atoms. The pulses are optimized using quantum optimal control techniques, resulting in smooth waveforms with only a few variational parameters. The short gate duration helps mitigate errors while achieving theoretical gate fidelities compatible with error correction.
Article
Optics
He Wang, Jin Wang
Summary: In this paper, we investigate nonstationary behavior in a fully connected qubit network using a random unitary evolution model. We observe that the environmental effect is reflected in the partial swap interaction between qubits. The nonstationary oscillatory state encoding memory of the initial state indicates the presence of a continuous time crystal phase. We also demonstrate the widespread occurrence of this nonstationary behavior in our model due to the generalized dynamical symmetry. Remarkably, the constructed time crystal phase shows robustness to most types of noise.
Article
Quantum Science & Technology
Jongheon Lee, Yousung Kang, You-Seok Lee, Boheung Chung, Dooho Choi
Summary: In this study, we propose an efficient method for decomposing mixed polarity multiple controlled Toffoli (MPMCT) gates. By addressing the issues with previous techniques, our method achieves lower T-depth.
QUANTUM INFORMATION PROCESSING
(2023)
Article
Physics, Multidisciplinary
Patrick Barthel, Patrick H. Huber, Jorge Casanova, Inigo Arrazola, Dorna Niroomand, Theeraphot Sriarunothai, Martin B. Plenio, Christof Wunderlich
Summary: We demonstrate the experimental implementation of a two-qubit phase gate using a radio frequency controlled trapped-ion quantum processor. The gate is generated by applying a pulsed dynamical decoupling sequence to the ions' carrier transitions, allowing for tunable and high-fidelity phase shift. The gate's performance is robust against various sources of error and holds potential for fast gate speeds.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
Seokho Jeong, Xiao-Feng Shi, Minhyuk Kim, Jaewook Ahn
Summary: Rydberg atom arrays are useful for various quantum applications. In this study, researchers propose an all-optical gate-based quantum computing scheme using auxiliary atoms for remote couplings and optical addressing for constructing universal quantum gates. They also provide a detailed resource estimate for implementing this scheme in a Rydberg quantum simulator.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Yewei Yuan, Chao Wang, Bei Wang, Zhao-Yun Chen, Meng-Han Dou, Yu-Chun Wu, Guo-Ping Guo
Summary: This paper proposes a quantum-classical comparator based on the quantum Fourier transform, which is used for comparing two quantum integers and modular arithmetic. The proposed algorithms reduce computing resources and make them valuable for noisy intermediate-scale quantum computers.
NEW JOURNAL OF PHYSICS
(2023)
Article
Optics
Kamanasish Debnath, Alexander Holm Kiilerich, Klaus Molmer
Summary: The study proposes a method to read the qubit state by utilizing the optical signal of nearby ancilla ions through Bayesian analysis. It investigates the effects of incoherent processes and suggests ways to mitigate their impact. Furthermore, entanglement of qubit ions is achieved through continuous monitoring of fluorescence signals from ancilla ions in remote cavities.
Article
Optics
W. X. Guo, Y. K. Wu, Y. Y. Huang, L. Feng, C. X. Huang, H. X. Yang, J. Y. Ma, L. Yao, Z. C. Zhou, L. M. Duan
Summary: This experiment demonstrates the ultrafast manipulation of qubits and spin-phonon entanglement in picoseconds using spin-dependent momentum kicks (SDKs) from single resonant laser pulses. The approach simplifies large-scale trapped-ion quantum computing by improving speed and reducing vulnerability to noise.
Article
Quantum Science & Technology
R. C. Souza, W. F. Balthazar, J. A. O. Huguenin
Summary: This study focuses on codifying qubits in the internal degrees of freedom of light, especially in the path degree of freedom, and presents a linear optical circuit design for encoding qubits on different bases. Geometrical representations for path degree of freedom, such as the Poincare-like sphere and Bloch sphere, were introduced. The designed linear optical circuits were used to construct universal quantum gates for photonic propagation path degree of freedom, with experimental simulations matching predictions of quantum theory.
QUANTUM INFORMATION PROCESSING
(2022)
Article
Computer Science, Hardware & Architecture
Woojoo Lee, Taewook Kang, Jae-Jin Lee, Kyuseung Han, Joongheon Kim, Massoud Pedram
IEEE TRANSACTIONS ON COMPUTER-AIDED DESIGN OF INTEGRATED CIRCUITS AND SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Coenrad Johann Fourie, Kyle Jackman, Matthys M. Botha, Sasan Razmkhah, Pascal Febvre, Christopher Lawrence Ayala, Qiuyun Xu, Nobuyuki Yoshikawa, Erin Patrick, Mark Law, Yanzi Wang, Murali Annavaram, Peter Beerel, Sandeep Gupta, Shaheen Nazarian, Massoud Pedram
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2019)
Article
Engineering, Electrical & Electronic
Naveen Kumar Katam, Oleg Mukhanov, Massoud Pedram
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2019)
Article
Engineering, Electrical & Electronic
Naveen Kumar Katam, Massoud Pedram
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2019)
Article
Engineering, Electrical & Electronic
Ghasem Pasandi, Kolsoom Mehrabi, Behzad Ebrahimi, Sied Mehdi Fakhraei, Ali Afzali-Kusha, Massoud Pedram
IET CIRCUITS DEVICES & SYSTEMS
(2019)
Article
Engineering, Electrical & Electronic
Farhad Ebrahimi-Azandaryani, Omid Akbari, Mehdi Kamal, Ali Afzali-Kusha, Massoud Pedram
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2020)
Article
Engineering, Electrical & Electronic
Mehdi Saeedi, Boris Ivanovic, Tomasz Stolarczyk, Ihab Amer, Gabor Sines
SIGNAL IMAGE AND VIDEO PROCESSING
(2020)
Proceedings Paper
Computer Science, Cybernetics
Mohamed Hegazy, Khaled Diab, Mehdi Saeedi, Boris Ivanovic, Ihab Amer, Yang Liu, Gabor Sines, Mohamed Hefeeda
PROCEEDINGS OF THE 10TH ACM MULTIMEDIA SYSTEMS CONFERENCE (ACM MMSYS'19)
(2019)
Proceedings Paper
Computer Science, Theory & Methods
Karunveer Singh, Rishabh Gupta, Vikram Gupta, Arash Fayyazi, Massoud Pedram, Shahin Nazarian
GLSVLSI '19 - PROCEEDINGS OF THE 2019 ON GREAT LAKES SYMPOSIUM ON VLSI
(2019)
Proceedings Paper
Computer Science, Theory & Methods
Ghasem Pasandi, Massoud Pedram
GLSVLSI '19 - PROCEEDINGS OF THE 2019 ON GREAT LAKES SYMPOSIUM ON VLSI
(2019)
Proceedings Paper
Automation & Control Systems
Arash Fayyazi, Soheil Shababi, Pierluigi Nuzzo, Shahin Nazarian, Massoud Pedram
2019 DESIGN, AUTOMATION & TEST IN EUROPE CONFERENCE & EXHIBITION (DATE)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Alvin D. Wong, Kevin Su, Hang Sun, Arash Fayyazi, Massoud Pedram, Shahin Nazarian
PROCEEDINGS OF THE 2019 20TH INTERNATIONAL SYMPOSIUM ON QUALITY ELECTRONIC DESIGN (ISQED)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Ming Yan, Yuntao Song, Yiyu Feng, Ghasem Pasandi, Massoud Pedram, Shahin Nazarian
PROCEEDINGS OF THE 2019 20TH INTERNATIONAL SYMPOSIUM ON QUALITY ELECTRONIC DESIGN (ISQED)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Ghasem Pasandi, Shahin Nazarian, Massoud Pedram
PROCEEDINGS OF THE 2019 20TH INTERNATIONAL SYMPOSIUM ON QUALITY ELECTRONIC DESIGN (ISQED)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Amir Erfan Eshratifar, Amirhossein Esmaili, Massoud Pedram
PROCEEDINGS OF THE 2019 20TH INTERNATIONAL SYMPOSIUM ON QUALITY ELECTRONIC DESIGN (ISQED)
(2019)
