Joshua Ramette
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View article: Carving entangled multiparticle states with exponentially improved fidelity
Carving entangled multiparticle states with exponentially improved fidelity Open
View article: Fault-tolerant optical interconnects for neutral-atom arrays
Fault-tolerant optical interconnects for neutral-atom arrays Open
We analyze the use of photonic links to enable large-scale fault-tolerant connectivity of locally error-corrected modules based on neutral atom arrays. Our approach makes use of recent theoretical results showing the robustness of surface …
View article: Site-selective cavity readout and classical error correction of a 5-bit atomic register
Site-selective cavity readout and classical error correction of a 5-bit atomic register Open
Optical cavities can provide fast and non-destructive readout of individual atomic qubits; however, scaling up to many qubits remains a challenge. Using locally addressed excited-state Stark shifts to tune atoms out of resonance, we realiz…
View article: Fault-tolerant optical interconnects for neutral-atom arrays
Fault-tolerant optical interconnects for neutral-atom arrays Open
We analyze the use of photonic links to enable large-scale fault-tolerant connectivity of locally error-corrected modules based on neutral atom arrays. Our approach makes use of recent theoretical results showing the robustness of surface …
View article: Fault-tolerant connection of error-corrected qubits with noisy links
Fault-tolerant connection of error-corrected qubits with noisy links Open
One of the most promising routes toward scalable quantum computing is a modular approach. We show that distinct surface code patches can be connected in a fault-tolerant manner even in the presence of substantial noise along their connecti…
View article: Counter-factual carving exponentially improves entangled-state fidelity
Counter-factual carving exponentially improves entangled-state fidelity Open
We propose a new method, "counter-factual" carving, that uses the "no-jump" evolution of a probe to generate entangled many-body states of high fidelity. The probe is coupled to a target ensemble of qubits and engineered to exponentially d…
View article: Landau-Forbidden Quantum Criticality in Rydberg Quantum Simulators
Landau-Forbidden Quantum Criticality in Rydberg Quantum Simulators Open
The Landau-Ginzburg-Wilson theory of phase transitions precludes a continuous transition between two phases that spontaneously break distinct symmetries. However, quantum mechanical effects can intertwine the symmetries, giving rise to an …
View article: Fault-Tolerant Connection of Error-Corrected Qubits with Noisy Links
Fault-Tolerant Connection of Error-Corrected Qubits with Noisy Links Open
One of the most promising routes towards scalable quantum computing is a modular approach. We show that distinct surface code patches can be connected in a fault-tolerant manner even in the presence of substantial noise along their connect…
View article: Machine-learning-accelerated Bose-Einstein condensation
Machine-learning-accelerated Bose-Einstein condensation Open
Machine learning is emerging as a technology that can enhance physics experiment execution and data analysis. Here, we apply machine learning to accelerate the production of a Bose-Einstein condensate (BEC) of ^{87}Rb atoms by Bayesian opt…
View article: Landau-Forbidden Quantum Criticality in Rydberg Quantum Simulators
Landau-Forbidden Quantum Criticality in Rydberg Quantum Simulators Open
The Landau-Ginzburg-Wilson theory of phase transitions precludes a continuous transition between two phases that spontaneously break distinct symmetries. However, quantum mechanical effects can intertwine the symmetries, giving rise to an …
View article: Machine-learning-accelerated Bose-Einstein condensation
Machine-learning-accelerated Bose-Einstein condensation Open
Machine learning is emerging as a technology that can enhance physics experiment execution and data analysis. Here, we apply machine learning to accelerate the production of a Bose-Einstein condensate (BEC) of $^{87}\mathrm{Rb}$ atoms by B…
View article: Any-To-Any Connected Cavity-Mediated Architecture for Quantum Computing with Trapped Ions or Rydberg Arrays
Any-To-Any Connected Cavity-Mediated Architecture for Quantum Computing with Trapped Ions or Rydberg Arrays Open
We propose a hardware architecture and protocol for connecting many local quantum processors contained within an optical cavity. The scheme is compatible with trapped ions or Rydberg arrays, and realizes teleported gates between any two qu…
View article: Any-to-any connected cavity-mediated architecture for quantum computing with trapped ions or Rydberg arrays
Any-to-any connected cavity-mediated architecture for quantum computing with trapped ions or Rydberg arrays Open
We propose a hardware architecture and protocol for connecting many local quantum processors contained within an optical cavity. The scheme is compatible with trapped ions or Rydberg arrays, and realizes teleported gates between any two qu…
View article: Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap
Direct Laser Cooling to Bose-Einstein Condensation in a Dipole Trap Open
We present a method for producing three-dimensional Bose-Einstein condensates using only laser cooling. The phase transition to condensation is crossed with 2.5×10^{4} ^{87}Rb atoms at a temperature of T_{c}=0.6 μK after 1.4 s of cooling. …
View article: Thermal modelling of Advanced LIGO test masses
Thermal modelling of Advanced LIGO test masses Open
High-reflectivity fused silica mirrors are at the epicentre of current\nadvanced gravitational wave detectors. In these detectors, the mirrors interact\nwith high power laser beams. As a result of finite absorption in the high\nreflectivit…
View article: Analytical model for ring heater thermal compensation in the Advanced Laser Interferometer Gravitational-wave Observatory
Analytical model for ring heater thermal compensation in the Advanced Laser Interferometer Gravitational-wave Observatory Open
Advanced laser interferometer gravitational-wave detectors use high laser power to achieve design sensitivity. A small part of this power is absorbed in the interferometer cavity mirrors where it creates thermal lenses, causing aberrations…
View article: Analytical Model for Ring Heater Thermal Compensation in Advanced LIGO
Analytical Model for Ring Heater Thermal Compensation in Advanced LIGO Open
Advanced laser interferometer gravitational-wave detectors use high laser power to achieve design sensitivity. A small part of this power is absorbed in the interferometer cavity mirrors where it creates thermal lenses, causing aberrations…