664 citations · 1.6k across the 24 of their papers we have counts for
24 papers
20 Second Parity Lifetime in an InAs--Pb Tetron Device
Morteza Aghaee, Zulfi Alam, Mariusz Andrzejczuk +162
A central promise of topological quantum computing is that increasing the excitation gap improves device performance significantly. Here, we experimentally validate this principle…
Distinct Lifetimes for and Loop Measurements in a Majorana Tetron Device
Morteza Aghaee, Zulfi Alam, Rikke Andersen +164
We present a hardware realization and measurements of a tetron qubit device in a superconductor-semiconductor heterostructure. The device architecture contains two parallel superco…
Response to recent comments on Phys. Rev. B 107, 245423 (2023) and Subsection S4.3 of the Supp. Info. for Nature 638, 651-655 (2025)
Morteza Aghaee, Zulfi Alam, Mariusz Andrzejczuk +127
The topological gap protocol (TGP) is a statistical test designed to identify a topological phase with high confidence and without human bias. It is used to determine a promising p…
Roadmap to fault tolerant quantum computation using topological qubit arrays
David Aasen, Morteza Aghaee, Zulfi Alam +179
We describe a concrete device roadmap towards a fault-tolerant quantum computing architecture based on noise-resilient, topologically protected Majorana-based qubits. Our roadmap e…
Interferometric Single-Shot Parity Measurement in an InAs-Al Hybrid Device
Morteza Aghaee, Alejandro Alcaraz Ramirez, Zulfi Alam +159
The fusion of non-Abelian anyons or topological defects is a fundamental operation in measurement-only topological quantum computation. In topological superconductors, this operati…
Scalable nanomechanical logic gate
Erick Romero, Nicolas P. Mauranyapin, Timothy M. F. Hirsch +4
Nanomechanical computers promise robust, low energy information processing. However, to date, electronics have generally been required to interconnect gates, while no scalable, pur…
Tunnelling of transverse acoustic waves on a silicon chip
Nicolas P. Mauranyapin, Erick Romero, Rachpon Kalra +3
Nanomechanical circuits for transverse acoustic waves promise to enable new approaches to computing, precision biochemical sensing and many other applications. However, progress is…
A Cryogenic Interface for Controlling Many Qubits
S. J. Pauka, K. Das, R. Kalra +9
A scaled-up quantum computer will require a highly efficient control interface that autonomously manipulates and reads out large numbers of qubits, which for solid-state implementa…
Propagation and imaging of mechanical waves in a highly-stressed single-mode phononic waveguide
Erick Romero, Rachpon Kalra, Nicolas P. Mauranyapin +3
We demonstrate a single-mode phononic waveguide that enables robust propagation of mechanical waves. The waveguide is a highly-stressed silicon nitride membrane that supports the p…
Free spectral range electrical tuning of a high quality on-chip microcavity
Christiaan Bekker, Christopher G. Baker, Rachpon Kalra +4
Reconfigurable photonic circuits have applications ranging from next-generation computer architectures to quantum networks, coherent radar and optical metamaterials. However, compl…
Injection locking of an electro-optomechanical device
Christiaan Bekker, Rachpon Kalra, Christopher Baker +1
The techniques of cavity optomechanics have enabled significant achievements in precision sensing, including the detection of gravitational waves and the cooling of mechanical syst…
Coherent control via weak measurements in P single-atom electron and nuclear spin qubits
J. T. Muhonen, J. P. Dehollain, A. Laucht +8
The understanding of weak measurements and interaction-free measurements has greatly expanded the conceptual and experimental toolbox to explore the quantum world. Here we demonstr…
A single-atom quantum memory in silicon
S. Freer, S. Simmons, A. Laucht +10
Long coherence times and fast gate operations are desirable but often conflicting requirements for physical qubits. This conflict can be resolved by resorting to fast qubits for op…
Optimization of a solid-state electron spin qubit using Gate Set Tomography
Juan P. Dehollain, Juha T. Muhonen, Robin Blume-Kohout +8
State of the art qubit systems are reaching the gate fidelities required for scalable quantum computation architectures. Further improvements in the fidelity of quantum gates deman…
Breaking the rotating wave approximation for a strongly-driven, dressed, single electron spin
Arne Laucht, Stephanie Simmons, Rachpon Kalra +10
We investigate the dynamics of a strongly-driven, microwave-dressed, donor-bound electron spin qubit in silicon. A resonant oscillating magnetic field is used to dress the el…
A Dressed Spin Qubit in Silicon
Arne Laucht, Rachpon Kalra, Stephanie Simmons +10
Coherent dressing of a quantum two-level system provides access to a new quantum system with improved properties - a different and easily tuneable level splitting, faster control,…
Vibration-induced electrical noise in a cryogen-free dilution refrigerator: characterization, mitigation, and impact on qubit coherence
Rachpon Kalra, Arne Laucht, Juan P. Dehollain +5
Cryogen-free low-temperature setups are becoming more prominent in experimental science due to their convenience and reliability, and concern about the increasing scarcity of heliu…
Transport of Spin Qubits with Donor Chains under Realistic Experimental Conditions
Fahd A. Mohiyaddin, Rachpon Kalra, Arne Laucht +3
The ability to transport quantum information across some distance can facilitate the design and operation of a quantum processor. One-dimensional spin chains provide a compact plat…
Bell's inequality violation with spins in silicon
Juan P. Dehollain, Stephanie Simmons, Juha T. Muhonen +8
Bell's theorem sets a boundary between the classical and quantum realms, by providing a strict proof of the existence of entangled quantum states with no classical counterpart. An…
Electrically controlling single spin qubits in a continuous microwave field
Arne Laucht, Juha T. Muhonen, Fahd A. Mohiyaddin +12
Large-scale quantum computers must be built upon quantum bits that are both highly coherent and locally controllable. We demonstrate the quantum control of the electron and the nuc…
Quantifying the quantum gate fidelity of single-atom spin qubits in silicon by randomized benchmarking
J. T. Muhonen, A. Laucht, S. Simmons +9
Building upon the demonstration of coherent control and single-shot readout of the electron and nuclear spins of individual 31-P atoms in silicon, we present here a systematic expe…
Storing quantum information for 30 seconds in a nanoelectronic device
Juha T. Muhonen, Juan P. Dehollain, Arne Laucht +7
The spin of an electron or a nucleus in a semiconductor [1] naturally implements the unit of quantum information -- the qubit -- while providing a technological link to the establi…
High-fidelity adiabatic inversion of a electron spin qubit in natural silicon
Arne Laucht, Rachpon Kalra, Juha T. Muhonen +7
The main limitation to the high-fidelity quantum control of spins in semiconductors is the presence of strongly fluctuating fields arising from the nuclear spin bath of the host ma…
Robust two-qubit gates for donors in silicon controlled by hyperfine interactions
Rachpon Kalra, Arne Laucht, Charles Hill +1
We present two strategies for performing two-qubit operations on the electron spins of an exchange-coupled pair of phosphorus donors in silicon, using the ability to set the donor…