A5068519828- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Quantum and electron transport phenomena
- Quantum-Dot Cellular Automata
- Quantum Mechanics and Applications
- Advanced Fiber Laser Technologies
- Scientific Measurement and Uncertainty Evaluation
- Quantum many-body systems
- Religion and Sociopolitical Dynamics in Nigeria
- Paranormal Experiences and Beliefs
- Topological Materials and Phenomena
- Scientific Computing and Data Management
- Advanced MRI Techniques and Applications
- Mass Spectrometry Techniques and Applications
- Advancements in PLL and VCO Technologies
- Artificial Intelligence in Games
- Advanced Memory and Neural Computing
- Nuclear Physics and Applications
- Acoustic Wave Resonator Technologies
- Atomic and Molecular Physics
- Neural Networks and Reservoir Computing
Harvard University
2023-2025
Weizmann Institute of Science
2017-2023
Suppressing errors is the central challenge for useful quantum computing
The ability to perform entangling quantum operations with low error rates in a scalable fashion is central element of useful information processing1. Neutral-atom arrays have recently emerged as promising computing platform, featuring coherent control over hundreds qubits2,3 and any-to-any gate connectivity flexible, dynamically reconfigurable architecture4. main outstanding challenge has been reduce errors mediated through Rydberg interactions5. Here we report the realization two-qubit...
Understanding the collective quantum dynamics of non-equilibrium many-body systems is an outstanding challenge in science. In particular, driven by fluctuations are important for formation exotic phases matter1, fundamental high-energy processes2, metrology3,4 and algorithms5. Here we use a programmable simulator based on Rydberg atom arrays to experimentally study across (2+1)-dimensional Ising phase transition. After crossing critical point, observe gradual growth correlations through...
High-fidelity two-qubit entangling gates play an important role in many quantum information processing tasks and are a necessary building block for constructing universal computer. Such high-fidelity have been demonstrated on trapped-ion qubits, however, control errors noise gate parameters may still lead to reduced fidelity. Here we propose demonstrate general family of which robust different sources errors. These generalize the celebrated M{\o}lmer-S{\o}rensen by using multi-tone drives....
Atomic isotope shifts (ISs) are the isotope-dependent energy differences between atomic electron levels. These have an important role in and nuclear physics, been recently suggested as unique probes of physics beyond standard model under condition that they determined significantly more precisely than current state art. In this Letter, we present a simple robust method for measuring ISs by taking advantage Hilbert subspaces insensitive to common-mode noise yet sensitive IS. Using evaluate IS...
Quantum computers are expected to achieve a significant speed-up over classical in solving range of computational problems. Chains ions held linear Paul trap promising platform for constructing such quantum computers, due their long coherence times and high quality control. Here, we report on the construction small five-qubit universal computer using 88Sr+ radio-frequency (rf) trap. All basic operations, including initialization, logic readout, performed with fidelity. Selective two-qubit...
The prevalent approach to executing quantum algorithms on computers is break down the a concatenation of universal gates, typically single and two-qubit gates. However such decomposition results in long gate sequences which are exponential qubit register size. Furthermore, fidelities tend decrease when acting larger registers. Thus high-fidelity implementations large registers still prominent challenge. Here we propose investigate multiqubit entangling gates for trapped ions. Our couple many...
Many-body systems of quantum interacting particles in which time-reversal symmetry is broken give rise to a variety rich collective behaviors and are, therefore, major target research modern physics. Quantum simulators can potentially be used explore understand such systems, are often beyond the computational reach classical simulation. Of these, platforms with universal control experimentally access wide range physical properties. However, simultaneously achieving strong programmable...
Engineering entanglement between quantum systems often involves coupling through a bosonic mediator, which should be disentangled from the at operation's end. The quality of such an operation is generally limited by environmental and control noise. One prime techniques for suppressing noise dynamical decoupling, where one actively applies pulses rate that faster than typical time scale However, boson-mediated gates, current decoupling schemes require executing only when boson are...
In recent years, arrays of atomic ions in a linear radio-frequency trap have proven to be particularly successful platform for quantum simulation. However, wide range models and phenomena have, so far, remained beyond the reach such simulators. this work we introduce technique that can substantially extend using an external field gradient along ion chain global, uniform driving field. The used generate both static time-varying synthetic gauge fields trapped ions, enables continuous...
Quantum simulations of many-body systems are among the most promising applications quantum computers. In particular, models based on strongly-correlated fermions central to our understanding chemistry and materials problems, can lead exotic, topological phases matter. However, due non-local nature fermions, such challenging simulate with qubit devices. Here we realize a digital simulation architecture for two-dimensional fermionic reconfigurable atom arrays. We utilize fermion-to-qubit...
We present a method that uses radio-frequency pulses to cancel the quadrupole shift in optical clock transitions. Quadrupole shifts are an inherent inhomogeneous broadening mechanism trapped ion crystals and impose one of limitations forcing current clocks work with single probe ion. Canceling this shift, at each interrogation cycle frequency, reduces complexity using $N>1$ ions clocks, thus allowing for reduction instability frequency by $\sqrt{N}$ according standard quantum limit. Our...
Suppressing errors is the central challenge for useful quantum computing, requiring error correction large-scale processing. However, overhead in realization of error-corrected ``logical'' qubits, where information encoded across many physical qubits redundancy, poses significant challenges to logical computing. Here we report a programmable processor based on operating with up 280 qubits. Utilizing logical-level control and zoned architecture reconfigurable neutral atom arrays, our system...
The ability to perform entangling quantum operations with low error rates in a scalable fashion is central element of useful information processing. Neutral atom arrays have recently emerged as promising computing platform, featuring coherent control over hundreds qubits and any-to-any gate connectivity flexible, dynamically reconfigurable architecture. major outstanding challenge has been reduce errors mediated through Rydberg interactions. Here we report the realization two-qubit gates...
In some quantum computing architectures, entanglement of an arbitrary number qubits can be generated in a single operation. This property has many potential applications, and may specifically useful for error correction (QEC). Stabilizer measurements then implemented using multiqubit gate instead several two-qubit gates, thus reducing circuit depth. this study, the toric code is used as benchmark to compare performance five-qubit gates within parity-check circuits. We consider trapped ion...
At radioactive ion beam (RIB) facilities, ions of short-lived radionuclides are cooled and bunched in buffer-gas-filled Paul traps to improve the ion-beam quality for subsequent experiments. To deliver even colder ions, beneficial RIB experiments' sensitivity or accuracy, we employ Doppler sympathetic cooling a trap cooler-buncher. The improved emittance ${\mathrm{Mg}}^{+}$, ${\mathrm{K}}^{+}$, ${\mathrm{O}}_{2}^{+}$ beams is demonstrated by reduced time-of-flight spread extracted bunches...
The use of entangled states was shown to improve the fundamental limits spectroscopy beyond standard-quantum limit. Here, rather than probing free evolution phase an state with respect a local oscillator, we probe initially separable two-atom register under Ising spin Hamiltonian transverse field. resulting correlated spin-rotation spectrum is twice as narrow that uncorrelated rotation. We implement this ideally Heisenberg-limited Rabi scheme on optical-clock electric-quadrupole transition...
Understanding the collective quantum dynamics of nonequilibrium many-body systems is an outstanding challenge in science. In particular, driven by fluctuations are important for formation exotic phases matter \cite{altman2023quantum}, fundamental high-energy processes \cite{bauer2023highenergy}, metrology \cite{degen2017sensing, li2023scrambling}, and algorithms \cite{ebadi2022quantum}. Here, we use a programmable simulator based on Rydberg atom arrays to experimentally study across (2+1)D...
Realizing universal fault-tolerant quantum computation is a key goal in information science. By encoding into logical qubits utilizing error correcting codes, physical errors can be detected and corrected, enabling substantial reduction rates. However, the set of operations that easily implemented on such encoded often constrained, necessitating use special resource states known as 'magic states' to implement universal, classically hard circuits. A method prepare high-fidelity magic perform...
Many-body systems of quantum interacting particles in which time-reversal symmetry is broken give rise to a variety rich collective behaviors, and are therefore major target research modern physics. Quantum simulators can potentially be used explore understand such systems, often beyond the computational reach classical simulation. Of these, platforms with universal control experimentally access wide range physical properties. However, simultaneously achieving strong programmable...
In some quantum computing (QC) architectures, entanglement of an arbitrary number qubits can be generated in a single operation.This property has many potential applications, and may specifically useful for error correction (QEC).Stabilizer measurements then implemented using multi-qubit gate instead several two-qubit gates, thus reducing circuit depth.In this study, the toric code is used as benchmark to compare performance twoqubit five-qubit gates within parity-check circuits.We consider...