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Sustained quantum coherence and entanglement in the avian compass.
It is found that superposition and entanglement are sustained in this living system for at least tens of microseconds, exceeding the durations achieved in the best comparable man-made molecular systems. Expand
Electron spin coherence exceeding seconds in high-purity silicon.
These coherence lifetimes are without peer in the solid state and comparable to high-vacuum qubits, making electron spins of donors in silicon ideal components of quantum computers, or quantum memories for systems such as superconducting qubits. Expand
A single-atom electron spin qubit in silicon
This work demonstrates the coherent manipulation of an individual electron spin qubit bound to a phosphorus donor atom in natural silicon, measured electrically via single-shot read-out. Expand
Solid-state quantum memory using the 31P nuclear spin
The transfer of information between different physical forms—for example processing entities and memory—is a central theme in communication and computation. This is crucial in quantum computation,Expand
High-fidelity readout and control of a nuclear spin qubit in silicon
Electrical detection and coherent manipulation of a single 31P nuclear spin qubit with sufficiently high fidelities for fault-tolerant quantum computing are demonstrated. Expand
Quantum computing with an electron spin ensemble.
It is proposed to encode a register of quantum bits in different collective electron spin wave excitations in a solid medium by locating them in the vicinity of a superconducting transmission line cavity, and making use of their strong collective coupling to the quantized radiation field. Expand
Will spin-relaxation times in molecular magnets permit quantum information processing?
In deuterated samples T2 reaches 3 micros at low temperatures, which is several orders of magnitude longer than the duration of spin manipulations, satisfying a prerequisite for the deployment of molecular nanomagnets in quantum information applications. Expand
Reaching the quantum limit of sensitivity in electron spin resonance.
This work improves the state-of-the-art sensitivity of inductive ESR detection by nearly four orders of magnitude, and demonstrates the detection of 1,700 bismuth donor spins in silicon within a single Hahn echo with unit signal-to-noise ratio. Expand
Room-Temperature Quantum Bit Storage Exceeding 39 Minutes Using Ionized Donors in Silicon-28
Eliminating isotopic impurities from the host material improves coherence times, as observed for qubits, based on the nuclear spin of neutral P donors in Si, and shows that a coherent spin superposition can be cycled from 4.2 kelvin to room temperature and back, and a cryogenic coherence time of 3 hours is reported. Expand
High-cooperativity coupling of electron-spin ensembles to superconducting cavities.
The coupling of electron-spin ensembles to a superconducting transmission-line cavity at strengths greatly exceeding the cavity decay rates and comparable to the spin linewidths is demonstrated. Expand