Time Symmetries of Quantum Memory Improve Thermodynamic Efficiency

• URL: http://arxiv.org/abs/2501.04865v1
• Date: Wed, 08 Jan 2025 22:30:35 GMT
• Title: Time Symmetries of Quantum Memory Improve Thermodynamic Efficiency
• Authors: Alexander B. Boyd, Paul M. Riechers,
• Abstract summary: Quantum memory offers a continuum of possible time-reversal symmetries. This enables the design of quantum memories that minimize irreversibility. As a result, quantum memory reduces energy dissipation several orders of magnitude below classical memory.
• Score: 49.1574468325115
• License:
• Abstract: Classical computations inherently require energy dissipation that increases significantly as the reliability of the computation improves. This dissipation arises when transitions between memory states are not balanced by their time-reversed counterparts. While classical memories exhibit a discrete set of possible time-reversal symmetries, quantum memory offers a continuum. This continuum enables the design of quantum memories that minimize irreversibility. As a result, quantum memory reduces energy dissipation several orders of magnitude below classical memory.

Related papers

• Theoretical framework for quantum associative memories [0.8437187555622164]
  Associative memory refers to the ability to relate a memory with an input and targets the restoration of corrupted patterns. We develop a comprehensive framework for a quantum associative memory based on open quantum system dynamics.
  arXiv  Detail & Related papers  (2024-08-26T13:46:47Z)
• Amplification of quantum transfer and quantum ratchet [56.47577824219207]
  We study a model of amplification of quantum transfer and making it directed which we call the quantum ratchet model. The ratchet effect is achieved in the quantum control model with dissipation and sink, where the Hamiltonian depends on vibrations in the energy difference synchronized with transitions between energy levels. Amplitude and frequency of the oscillating vibron together with the dephasing rate are the parameters of the quantum ratchet which determine its efficiency.
  arXiv  Detail & Related papers  (2023-12-31T14:04:43Z)
• Characterising the Hierarchy of Multi-time Quantum Processes with Classical Memory [1.3749490831384266]
  We study multi-time quantum processes with memory mechanisms that transmit only classical information forward in time. We also study two related processes that could also be considered to have classical memory from a structural perspective.
  arXiv  Detail & Related papers  (2023-07-21T21:08:08Z)
• Entanglement Distribution in Quantum Repeater with Purification and Optimized Buffer Time [53.56179714852967]
  We explore entanglement distribution using quantum repeaters with optimized buffer time. We observe that increasing the number of memories on end nodes leads to a higher entanglement distribution rate per memory. When imperfect operations are considered, however, we make the surprising observation that the per-memory entanglement rate decreases with increasing number of memories.
  arXiv  Detail & Related papers  (2023-05-23T23:23:34Z)
• Anticipative measurements in hybrid quantum-classical computation [68.8204255655161]
  We present an approach where the quantum computation is supplemented by a classical result. Taking advantage of its anticipation also leads to a new type of quantum measurements, which we call anticipative. In an anticipative quantum measurement the combination of the results from classical and quantum computations happens only in the end.
  arXiv  Detail & Related papers  (2022-09-12T15:47:44Z)
• Quantum associative memory with a single driven-dissipative nonlinear oscillator [0.0]
  We propose a realization of associative memory with a single driven-dissipative quantum oscillator. The model can improve the storage capacity of discrete neuron-based systems in a large regime. We show that the associative-memory capacity is inherently related to the existence of a spectral gap in the Liouvillian superoperator.
  arXiv  Detail & Related papers  (2022-05-19T12:00:35Z)
• Multimode capacity of atomic-frequency comb quantum memories [48.7576911714538]
  Ensemble-based quantum memories are key to developing multiplexed quantum repeaters. Rare-earth ion doped crystals are main candidates for highly multimode quantum memories. AFC quantum memory provides large temporal multimode capacity.
  arXiv  Detail & Related papers  (2022-02-24T22:07:01Z)
• Quantum coarse-graining for extreme dimension reduction in modelling stochastic temporal dynamics [0.0]
  coarse-graining in quantum state space drastically reduces requisite memory dimension for modelling temporal dynamics. In contrast to classical coarse-graining, this compression is not based on temporal resolution, and brings memory-efficient modelling within reach of present quantum technologies.
  arXiv  Detail & Related papers  (2021-05-14T13:47:21Z)
• Memory compression and thermal efficiency of quantum implementations of non-deterministic hidden Markov models [0.0]
  We provide a systematic prescription for constructing quantum implementations of non-deterministic HMMs. We show that our implementations will both mitigate some of this dissipation, and achieve an advantage in memory compression.
  arXiv  Detail & Related papers  (2021-05-13T13:32:25Z)
• Continuous-time dynamics and error scaling of noisy highly-entangling quantum circuits [58.720142291102135]
  We simulate a noisy quantum Fourier transform processor with up to 21 qubits. We take into account microscopic dissipative processes rather than relying on digital error models. We show that depending on the dissipative mechanisms at play, the choice of input state has a strong impact on the performance of the quantum algorithm.
  arXiv  Detail & Related papers  (2021-02-08T14:55:44Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.