Quantum memory photon echo-like techniques in solids

Моисеев, С. А.; Tarasov, V. F.; Ham, Byoung S.

doi:10.1088/1464-4266/5/4/356

Cited by 73 publications

(89 citation statements)

References 23 publications

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“…Gaseous media are, however, hampered of short storage times, determined by phase randomization of the emitted radiation due to atomic movement, velocity change, and loss of atoms from the interaction region [92]. A first adaption of the protocol towards solid state systems was suggested in 2003 [93] using methods from nuclear magnetic resonance that allow quantum memory for microwave photons. In 2005 and 2006 three groups then described how the quantum memory scheme could be extended to solid state materials and photonic wave packets encoded into the optical part of the electromagnetic spectrum [25][26][27].…”

Section: Historical Developmentmentioning

confidence: 99%

Photon‐echo quantum memory in solid state systems

Tittel¹,

Afzelius

Chanelière

et al. 2010

Laser & Photonics Reviews

429

418

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Many applications of quantum communication crucially depend on reversible transfer of quantum states between light and matter. Motivated by rapid recent developments in theory and experiment, we review research related to quantum memory based on a photon-echo approach in solid state material with emphasis on use in a quantum repeater. After introducing quantum communication, the quantum repeater concept, and properties of a quantum memory required to be useful in a quantum repeater, we describe the historical development from spin echoes, discovered in 1950, to photon-echo quantum memory. We present a simple theoretical description of the ideal protocol, and comment on the impact of a non-ideal realization on its quantum nature. We extensively discuss rare-earth-ion doped crystals and glasses as material candidates, elaborate on traditional photon-echo experiments as a test-bed for quantum state storage, and describe the current state-of-the-art of photon-echo quantum memory. Finally, we give a brief outlook on current research.The picture shows a Europium doped Y2SiO5 crystal surrounded by electrodes in the setup used for the first proof-of-principle demonstration of the novel, photon-echo based quantum memory protocol.

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Section: Historical Developmentmentioning

confidence: 99%

Photon‐echo quantum memory in solid state systems

Tittel¹,

Afzelius

Chanelière

et al. 2010

Laser & Photonics Reviews

429

418

View full text Add to dashboard Cite

show abstract

“…Compared with optical coherence, spin coherence is much more robust, roughly ten times longer than the optical counterpart (Ham et al, 1997). Thus, if the optical coherence can be transferred into spin ensembles, longer storage time can be obtained (Moiseev & Kroll, 2001;Moiseev et al, 2003). In 1998, spin coherence excitation using temporally separated Raman optical pulses was investigated, where optical coherence between the optical pulses forming a Raman pulse plays a major role (Ham et al, 1998).…”

Section: To Solve Short Storage Time In Two-pulse Photon Echoesmentioning

confidence: 99%

“…Since the first observation of coherent retrieval of a stored optical pulse in a Bose Einstein condensate using slow light (Liu et al, 2001), interest in quantum memories has increased in the last decade (Alexander et al, 2006;Afzelius et al, 2010;Chaneliere et al, 2005. Choi et al, 2008110 Ham, 1998;Ham 2009a;Ham, 2010a;Hedges et al, 2010;Hetet et al, 2008;Hosseini et al, 2009;Julsgaard et al, 2004;Kocharovskaya et al, 2001;Kraus et al, 2006;Liu et al, 2001;Moiseev & Kroll, 2001;Moiseev et al, 2003;Neumann et al, 2009;Nilsson & Kroll, 2005;Sangouard et al, 2007;Turukhin et al, 2002;Van der Wal, et al, 2003). Because temporal multimode storage capability is required for the quantum repeaters, a photon echo-type protocol has emerged as a best candidate.…”

Section: Introductionmentioning

confidence: 99%

Control of Photon Storage Time in Photon Echoes using a Deshelving Process

Ham¹

2011

Numerical Simulations - Applications, Examples and Theory

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“…One of the approaches taken towards this goal is to use ensembles of atoms that can be controlled in such a way as to store and then controllably release light at some later time. Numerous techniques have been developed including electromagnetically induced transparency (EIT) 4 , the atomic frequency comb (AFC) 5,6,7 , four-wave mixing (FWM) 8 , Raman absorption 9 , Faraday interaction 10 and photon echo techniques 11,12,13,14,13,15,16,17,18,19 .…”

Section: Introductionmentioning

confidence: 99%

Gradient Echo Quantum Memory in Warm Atomic Vapor

Pinel

Hosseini

Sparkes

et al. 2013

JoVE

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Gradient echo memory (GEM) is a protocol for storing optical quantum states of light in atomic ensembles. The primary motivation for such a technology is that quantum key distribution (QKD), which uses Heisenberg uncertainty to guarantee security of cryptographic keys, is limited in transmission distance. The development of a quantum repeater is a possible path to extend QKD range, but a repeater will need a quantum memory. In our experiments we use a gas of rubidium 87 vapor that is contained in a warm gas cell. This makes the scheme particularly simple. It is also a highly versatile scheme that enables in-memory refinement of the stored state, such as frequency shifting and bandwidth manipulation. The basis of the GEM protocol is to absorb the light into an ensemble of atoms that has been prepared in a magnetic field gradient. The reversal of this gradient leads to rephasing of the atomic polarization and thus recall of the stored optical state. We will outline how we prepare the atoms and this gradient and also describe some of the pitfalls that need to be avoided, in particular four-wave mixing, which can give rise to optical gain.

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Quantum memory photon echo-like techniques in solids

Cited by 73 publications

References 23 publications

Photon‐echo quantum memory in solid state systems

Photon‐echo quantum memory in solid state systems

Control of Photon Storage Time in Photon Echoes using a Deshelving Process

Gradient Echo Quantum Memory in Warm Atomic Vapor

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