Full Download Towards a Spin-Ensemble Quantum Memory for Superconducting Qubits: Design and Implementation of the Write, Read and Reset Steps - Cecile Grezes | ePub
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Towards a Spin-Ensemble Quantum Memory for Superconducting Qubits: Design and Implementation of the Write, Read and Reset Steps
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A quantum memory that combines high-efficiency and long lifetime is now demonstrated. Employing a collective excitation, or spin wave, in an ensemble of atoms in a trap improves memory lifetime.
The strong coupling regime accompanied by large collective coupling strengths of 30–200 mhz has been recently demon-strated [22–24]. However, reversible mapping of temporal microwave modes in a re spin ensemble has yet to be shown.
We propose a general method to maximize the fidelity of writing, storage and reading of quantum information (qi) in a spectrally inhomogeneous spin ensemble used as quantum memory.
Apr 11, 2019 multimode storage of quantum microwave fields in electron spins over 100 towards superconductor-spin ensemble hybrid quantum systems).
Towards solid-state quantum repeaters ultrafast, coherent optical control and spin-photon entanglement in charged inas quantum dots; towards a scalable quantum computing platform in the ultrastrong coupling regime; towards a spin-ensemble quantum memory for superconducting qubits design and implementation of the write, read and reset steps.
In quantum computing, quantum memory is the quantum-mechanical version of ordinary computer memory. Whereas ordinary memory stores information as binary states (represented by 1s and 0s), quantum memory stores a quantum state for later retrieval. These states hold useful computational information known as qubits.
Towards a spin-ensemble quantum memory for superconducting qubits. Centrum péče o zákazníky; účet; vítáme vás, můžete se přihlásit nebo vytvořit účet.
Towards a spin-ensemble quantum memory for superconducting qubits. C grezes, y kubo, b julsgaard, t umeda, j isoya, h sumiya, h abe,.
International audience 2021-01-10: towards a spin-ensemble quantum memory for superconducting qubits: towards a spin-ensemble quantum memory for superconducting qubits.
We first present the protocol devised for such a multi-mode quantum memory. We then describe a series of experimental results using nv center spins in diamond, which demonstrate its main building blocks: the transfer of arbitrary quantum states from a qubit into the spin ensemble, and the multi-mode retrieval of classical microwave pulses down.
Objednávejte knihu towards a spin-ensemble quantum memory for superconducting qubits v internetovém knihkupectví megaknihy. Nejnižší ceny 450 výdejních míst 99% spokojených zákazníků.
Ment between a quantum memory (electron spin qubit) and a flying qubit (polarization- or frequency-encoded photonic qubit). This is a first step towards demonstrating entanglement between distant quantum memories (realized with quantum dots), which in turn is a milestone in the roadmap for building a functional quantum repeater.
The goal is to store over long times arbitrary qubit states in orthogonal collective modes of the spin-ensemble, and to retrieve them on-demand. We first present the protocol devised for such a multi-mode quantum memory.
Our results pave the way for long-duration optical quantum storage using spin-echo techniques for any ensemble-based memory. Ab - long-lived quantum memories are essential components of a long-standing goal of remote distribution of entanglement in quantum networks.
In this study, the main results of experimental and theoretical investigations that substantiate the possibility of the development of quantum computational systems with a separate structure are considered and analyzed. These systems involve the operational part and the memory, as well as the communication quantum network, which performs the data exchange between them.
Concept of a hybrid quantum processor combining a two-qubit processor and a spin ensemble multimode quantum memory. The exchange of quantum states between the processor and the memory is implemented by a superconducting microwave resonator used as a quantum bus, which is coupled electrically with the qubits and magnetically with the spins.
By achieving both efficient and relatively long-lived storage, the researchers have shown a new possible route toward reliable quantum memory.
Strong coupling of a spin ensemble to a superconducting resonator. Y kubo, fr ong, towards a spin-ensemble quantum memory for superconducting qubits.
Strong coupling between a microwave photon and electron spins, which could enable a long-lived quantum memory element for superconducting qubits, is possible using a large ensemble of spins. This represents an inefficient use of resources unless multiple photons, or qubits, can be orthogonally stored and retrieved.
Coherent coupling between a superconducting qubit and a spin ensemble of quantum memory operation in a superconductor-diamond hybrid system. Is the first step towards a long-lived quantum memory for a superconducting qubit.
A multi-mode quantum memory able to store coherently large numbers of qubit states is a desirable resource for quantum information. We report progress towards this direction, using an ensemble of electronic spins (nv centers in diamond) coupled to a superconducting transmon qubit via a tunable resonator.
This chapter concludes the work we have made towards a spin ensemble quantum memory. It gathers a selection of experiments and realizations initiated at the end of this thesis work that illustrate the next steps to reach the operational level.
Towards a spin-ensemble quantum memory for superconducting qubits. Review of the experimental effort on quantum memories for microwave photons.
Sep 27, 2010 electron spins in solids are promising candidates for quantum memories for superconducting qubits because they can have long coherence times.
Abstract a multi-mode quantum memory able to store coherently large numbers of qubit states is a desirable resource for quantum information. We report progress towards this direction, using an ensemble of electronic spins (nv centers in diamond) coupled to a superconducting transmon qubit via a tunable resonator.
We first present the protocol devised for such a multi-mode quantum memory. We then describe a series of experimental results using nv center spins in diamond, which demonstrate its main building blocks: the transfer of arbitrary quantum states from a qubit into the spin ensemble, and the multi-mode retrieval of classical microwave pulses down to the single-photon level with a hahn-echo like sequence.
Such an intermediate storage unit can be called a quantum memory, and they may also come to play a major role in quantum repeaters in photonics-based.
Nuclear spin ensembles in quantum dots use single atoms for memory and absorb or emit a photon in a controlled way toward enhanced nonlinear optics.
Long-lived quantum memories are essential components of a long-standing goal of remote distribution of entanglement in quantum networks. These can be realized by storing the quantum states of light as single-spin excitations in atomic ensembles. However, spin states are often subjected to different dephasing processes that limit the storage time, which in principle could be overcome using spin.
1 storage of electron spin states in an ensemble of nuclear spins 52 path towards robust, many qubit quantum computation.
(b) circuit implementation of the quantum memory: an ensemble of n electron spins are inductively coupled to a lumped resonator which is capacitively coupled.
Jan 7, 2019 macroscopically distinct superposition in a spin ensemble coupled to “towards realizing a quantum memory for a superconducting qubit:.
We propose to encode a register of quantum bits in different collective electron spin wave excitations in a solid medium. Coupling to spins is enabled 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. The transformation between different spin waves is achieved by applying gradient.
Qubit states are written by resonant absorption of a microwave photon in the spin ensemble and read out of the memory on-demand by applying hahn echo refocusing techniques to the spins. The reset step is implemented in between two successive write-read sequences using optical repumping of the spins.
This work describes theoretical and experimental advances towards the realization of a hybrid quantum processor in which the collective degrees of freedom of an ensemble of spins in a crystal are used as a multi-qubit register for superconducting qubits. A memory protocol made of write, read and reset operations is first presented, followed by the demonstration of building blocks of its implementation with nv center spins in diamond.
Dynamical zeroing of spin-wave momentum to suppress motional dephasing in an atomic-ensemble quantum memory yan jiang, jun rui, xiao-hui bao, and jian-wei pan phys.
Jan 24, 2011 an international research group claims to have taken an essential step towards silicon-based quantum computing by entangling 10 billion.
Experimental efforts toward the implementation of a spin‐ensemble quantum memory.
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